Endress+Hauser FTL50H, FTL51H, FTL51, FTL50 Specifications

TI00328F/00/EN/17.17
71379381

Products Solutions Services

Technical Information

Liquiphant M
FTL50, FTL51, FTL50H, FTL51H

Vibronic

Point level switch for all kinds of liquids

Application

• Process temperatures from –50 °C to 150 °C (-58 to 302 °F)

• Pressures up to 100 bar (1450 psi)

• Viscosities up to 10,000 mm/s (cSt)

• For liquids with densities 0.5 g/cm

FTL50: Compact design
FTL51: Extension pipe up to 3 m (9.8 ft) and up to 6 m (20 ft) on request
FTL50H, FTL51H:

Ideal substitute for float switches, as reliable function not affected by flow, turbulence,
bubbles, foam, vibration, solids content or buildup.

Your benefits

• Recommended for safety systems requiring functional safety to SIL2/SIL3 as per IEC
61508/IEC 61511-1

• Design in accordance with ASME B31.3

• Recommended for use in sterile applications in the life science industry
(design in accordance with ASME BPE)

• No adjustment: quick, low-cost startup

• No mechanically moving parts: no maintenance, no wear, long operating life

• Functional safety: Monitoring of tuning fork for damage

• Compact stainless steel housing (optional): the IP69 protection rating guarantees
that the unit remains impermeable, even in the event of intensive cleaning or
flooding for several hours

Certified for the food and pharmaceutical industries



(SGU)

Table of contents

Liquiphant M FTL50(H), FTL51(H)

Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Point level detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Function and system design . . . . . . . . . . . . . . . . . . . . . .4

Measuring principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Modularity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Electronic versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Electronics for continuous density measurement . . . . . . . . . . . 5

Galvanic isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Measured variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Measuring range (detection range) . . . . . . . . . . . . . . . . . . . . . . 5

Density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Electronic insert FEL51 (AC 2-wire) . . . . . . . . . . . . . . .6

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Electronics FEL51 (AC, in compact housing) . . . . . . . .8

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Electronic insert FEL52 (DC PNP). . . . . . . . . . . . . . . . 10

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Electronic insert FEL56 (NAMUR L-H edge) . . . . . . . 15

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Electronic insert FEL58 (NAMUR H-L edge) . . . . . . . 16

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Electronics FEL58 (NAMUR H-L edge, compact

housing) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Electronic insert FEL57 (PFM) . . . . . . . . . . . . . . . . . . 18

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Electronic insert FEL50A (PROFIBUS PA) . . . . . . . . . 20

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Electronics FEL52 (DC PNP, in compact housing) . . 11

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Electronic insert FEL50D (density). . . . . . . . . . . . . . . 22

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Operating principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Light signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Electronic insert FEL54 (AC/DC with relay output). 13

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Electronic insert FEL55 (8/16 mA) . . . . . . . . . . . . . . 14

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Connection and function . . . . . . . . . . . . . . . . . . . . . . . 24

Connecting cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Safety mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Switching time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Switch-on behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Performance characteristics . . . . . . . . . . . . . . . . . . . . 24

Reference operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . 24

Maximum measured error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Repeatability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

2 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

Influence of medium temperature . . . . . . . . . . . . . . . . . . . . . . . 24

Influence of medium density . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Influence of medium pressure . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Switching delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Operating conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Examples of mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Ambient temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Installation height as per

IEC61010-1 Ed.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Climate class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Degree of protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Vibration resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Electromagnetic compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Medium conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Medium temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Thermal shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Medium pressure pe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Test pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

State of aggregation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Viscosity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Solids content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Lateral loading capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Weld-in adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Weather protection cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Lap joint flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Lap joint flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Sliding sleeves for unpressurized operation . . . . . . . . . . . . . . . 54

High pressure sliding sleeves . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Cover with sight glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Cover with sight glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Circular connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Functional safety (SIL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Safety Instructions (NEPSI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Control Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

System information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Mechanical construction . . . . . . . . . . . . . . . . . . . . . . . 30

Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Materials and surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Process connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Human interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Electronic inserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Compact housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Operating concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Certificates and approvals . . . . . . . . . . . . . . . . . . . . . . 41

CE mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

RoHS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

RCM-tick mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

EAC conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

CRN approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Pressure Equipment Directive 2014/68/EU (PED) . . . . . . . . . 41

Process seal according to ANSI/ISA 12.27.01 . . . . . . . . . . . . . 42

General approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Other certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Manufacturer declarations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Use in hazardous zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

ASME B 31.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Pressure equipment directive . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Product structure for Liquiphant M FTL50, FTL51 . . . . . . . . . 44

Product structure for Liquiphant M FTL50H, FTL51H . . . . . . 48

3 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

FEL51/52/54

…

…

FEL55/56/57/58/50A

Ex i

E

X

E

X

Switching unit
PLC
Isolating
amplifier
Segment
coupler

Application

Point level detection Maximum or minimum detection in tanks or pipes containing all kinds of liquids, including use in

hazardous areas, food and pharmaceuticals.

L00-FTL5xxxx-11-05-xx-xx-000

Function and system design

Measuring principle The sensor's fork vibrates at its intrinsic frequency. This frequency is reduced when covered with liquid.

This change in frequency causes the point level switch to switch.

Modularity

Point level switch

Liquiphant M FTL with electronic versions
FEL51, FEL52, FEL54

L00-FTL5xxxx-15-05-xx-xx-000

Point level switch

Liquiphant M FTL with electronic versions
FEL55, FEL56, FEL57, FEL58
for connecting to a separate switching unit
or an isolating amplifier FEL50A
for connecting to a PROFIBUS PA segment

4 Endress+Hauser

L00-FTL5xxxx-15-05-xx-en-000

Liquiphant M FTL50(H), FTL51(H)

Electronic versions FEL51:

Two-wire AC version;
Switches the load directly into the power supply circuit via an electronic switch.

FEL52:
Three-wire DC version;
Switches the load via the transistor (PNP) and separate connection e.g. in conjunction with
programmable logic controllers (PLCs), DI modules as per EN 61131-2.

FEL54:
Universal current version with relay output;
Switches the loads via 2 floating change-over contacts.

FEL55:
Signal transmission 16/8 mA on two-wire cabling e.g. in conjunction with programmable logic
controllers (PLCs), AI modules 4 to 20 mA as per EN 61131-2.

FEL56:
For separate switching unit; signal transmission L-H edge 0.6 to 1.0 / 2.2 to 2.8 mA
to EN 50227 (NAMUR) on two-wire cabling.

FEL58:
For separate switching unit; signal transmission H-L edge 2.2 to 3.5 / 0.6 to 1.0 mA
to EN 50227 (NAMUR) on two-wire cabling.
Checking of connecting cabling and other devices by pressing a key on the electronic insert.

FEL57:
For separate switching unit; PFM signal transmission;
Current pulses superposed on the power supply along the two-wire cabling.
Proof test from the switching unit without changing levels.

FEL50A:
For connecting to PROFIBUS PA;
Cyclic and acyclic data exchange acc. to PROFIBUS-PA Profile 3.0
Discrete Input

Electronics for continuous density measurement

Galvanic isolation FEL51, FEL52, FEL50A: between sensor and power supply

Design FTL50: Compact

FEL50D:
For connecting to Density Computer FML621

FEL54: between sensor and power supply and load

FEL55, FEL56, FEL57, FEL58, FEL50D: see connected switching unit

FTL51: With extension pipe

FTL50H: Compact, with polished tuning fork and hygienic process connections

FTL51H: With extension pipe, polished tuning fork and hygienic process connections

Input

Measured variable Level (limit value)

Measuring range (detection range)

FTL50: dependent on mounting point

FTL51: dependent on mounting point and the extension pipe ordered.
Standard extension pipe up to 3 m (9.8 ft) and up to 6 m (20 ft) on request.

Density Setting on the electronic insert > 0.5 g/cm (SGU) or > 0.7 g/cm (SGU) (others on request)

Endress+Hauser 5

Electronic insert FEL51 (AC 2-wire)

L1

U~ max. 253 V AC

50/60 Hz

NNPE

(Ground)

1A

min.
19 V

12

FEL51

*

R

*

External load R

be connectedmust

MAX

MIN

Power supply Supply voltage: AC 19 to 253 V

Power consumption: < 0.83 W
Residual current consumption: < 3.8 mA
Short-circuit protection
Overvoltage protection FEL51: overvoltage category III

Electrical connection Two-wire AC connection

Switches the load directly into the power supply
circuit via an electronic switch.

Always connect in series with a load!

Check the following:

• The residual current in blocked state
(up to 3.8 mA)

• That for low voltage
– the voltage drop across the load is such that

the minimum terminal voltage at the
electronic insert (19 V)
when blocked is not undershot.

– the voltage drop across the electronics when

switched through is observed (up to 12 V)

• That a relay cannot de-energize with holding
power below 3.8 mA.
If this is the case, a resistor should be
connected parallel to the relay. An RC module is
available under the part number: 71107226

• When selecting the relay, pay attention to the
holding power
/ rated power
(see "Connectable load")

Liquiphant M FTL50(H), FTL51(H)

L00-FTL5xxxx-04-05-xx-en-007

Output signal

I

L

= load current

Safety mode Level Output signal LEDs

(switched through)

< 3.8 mA

= residual current

(blocked)

= lit

= unlit

L00-FTL2xxxx-07-05-

xx-xx-000

Signal on alarm Output signal on power failure or in the event of damaged sensor: < 3.8 mA

Connectable load • Voltage drop via FEL51

12 V

• Residual current if electrical switch is blocked:

 3.8 mA

• Load switched directly into the power supply circuit via the thyristor.
Transient (40 ms)

 1.5 A,  375 VA at 253 V or  36 VA at 24 V (not short-circuit-proof)

The load is switched via an electronic switch directly in the power circuit.
Always connect in series with a load!
Not suitable for connection to low-voltage PLC inputs!

green red

L00-FTL5xxxx-04-05-xx-xx-001

6 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

2.7

2.5

2.3

2.1

1.9

1.7

1.5

1.3

1.1

0.9

0.7

0.5
20 24 27 43 48 53 60 110 121 207 230 253

P/S

U

P1

Selection guide for relays

TI00328F_001

Minimum nominal power of load
P/S nominal power in [W] / [VA]
U operating voltage in [V]

Position Operating voltage Nominal power

min. max.

P1
AC operation

24 V
110 V
230 V

> 1.3 VA
> 1.5 VA
> 2.5 VA

< 8.4 VA
< 38.5 VA
< 80.5 VA

Relays with less nominal power can be operated via an RC module connected in parallel (optional).

Endress+Hauser 7

Electronics FEL51 (AC, in compact housing)

(Ground)

1

(BU)

3

(BN)

R

1.0 A

L1

N

PE

> 19 V

(Ground)

1

(BU)

2

(BK)

R

1.0 A

L1

N

PE

> 19 V

(GN/YE) (GN/YE)

1

3

1

2

FTL5#(H)- #######D3#
(Pg11)

FTL5#(H)- #######E3#
(NPT ½")

FTL5#(H)- #######C3#

(Ground)

R

1.0 A

L1

N

PE

> 19 V

(Ground)

R

1.0 A

L1

N

PE

> 19 V

oder

-30°C ≤ TA ≤ +70°C

-°≤TA≤+ °22 F 158 F

MAX

MIN

1 3

1 2

1 2

I

L

I

L

< 3.8 mA

< 3.8 mA

1 3

Power supply Supply voltage: AC 19 to 253 V

Power consumption: < 0.83 W
Residual current consumption: < 3.8 mA
Short-circuit protection
Overvoltage protection FEL51: overvoltage category III

Electrical connection Two-wire AC connection

Switches the load directly into the
power supply circuit via an
electronic switch.

Always connect in series with a
load!

Check the following:

• The residual current in blocked
state (up to 3.8 mA)

• That for low connection voltage

Liquiphant M FTL50(H), FTL51(H)

Connector MAX MIN

– the voltage drop across the

load is such that the
minimum
terminal voltage at the
electronic insert (19 V) when
blocked is not
undershot.

– the voltage drop across

the electronics when
switched
through is observed
(up to 12 V)

• That a relay cannot de-energize with holding power below 3.8 mA.
If this is the case, a resistor should be connected parallel to the relay (e.g. RC module: part number

71107226).

• When using in conjunction with a cable end (FTL5#(H)- #######C3#), the compact housing
should only be used in enclosed areas.

Output signal

I

L

< 3.8 mA

L00-FTL2xxxx-07-05-

xx-xx-000

= load current

(switched through)

= residual current

(blocked)

= lit

= unlit

Signal on alarm Output signal on power failure or in the event of damaged sensor: < 3.8 mA

Safety mode Level Output signal LEDs

L00-FTL5xxxx-04-05-xx-xx-012

green red

L00-FTL5xxxx-04-05-xx-xx-001a

8 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

2.7

2.5

2.3

2.1

1.9

1.7

1.5

1.3

1.1

0.9

0.7

0.5
20 24 27 43 48 53 60 110 121 207 230 253

P/S

U

P1

Connectable load • Voltage drop via FEL51  12 V

• Residual current if electrical switch is blocked:  3.8 mA

• Load switched directly into the power supply circuit via the thyristor.
Transient (40 ms)

 1.5 A,  375 VA at 253 V or  36 VA at 24 V (not short-circuit-proof)

The load is switched via an electronic switch directly in the power circuit.
Always connect in series with a load!
Not suitable for connection to low-voltage PLC inputs!

Selection guide for relays

Minimum nominal power of load
P/S nominal power in [W] / [VA]
U operating voltage in [V]

Position Operating voltage Nominal power

P1
AC operation

Relays with less nominal power can be operated via an RC module connected in parallel (optional).

Endress+Hauser 9

24 V
110 V
230 V

> 1.3 VA
> 1.5 VA
> 2.5 VA

TI00328F_001

min. max.

< 8.4 VA
< 38.5 VA
< 80.5 VA

Electronic insert FEL52 (DC PNP)

1 2 3

(+)

FEL52

L+

L–

–

0.5 A

U– 10…55 V DC

...

Relais,
PLC, ...

PE

(Ground)

R

MAX

MIN

L+ +

1 3

L+ +

1 3

1 3

1 3

I

L

I

L

< 100 μA

< 100 μA

Power supply Supply voltage: DC 10 to 55 V

 1.7 V, 0 to 400 Hz

Ripple:
Current consumption:  15 mA
Power consumption:  0.83 W
Reverse polarity protection
Overvoltage protection FEL52: overvoltage category III

Electrical connection Three-wire DC connection

Switches the load via the transistor (PNP) and
separate connection.
Preferably used with programmable logic
controllers (PLC),
DI modules as per EN 61131-2.
Positive signal at switching output of the
electronics (PNP); Output blocked on reaching
point level.

Liquiphant M FTL50(H), FTL51(H)

L00-FTL5xxxx-04-05-xx-xx-030

Output signal

Safety mode Level Output signal LEDs

green red

I

L

= load current

(switched through)

< 100 μA

= residual current

(blocked)

= lit

= unlit

L00-FTL2xxxx-07-05-

xx-xx-000

L00-FTL5xxxx-04-05-xx-xx-004

Signal on alarm Output signal on power failure or in the event of damaged sensor: < 100 μA

Connectable load • Load switched via the transistor and separate PNP connection,

•Load current

 DC 55 V

 350 mA (pulsed overload and short-circuit protection)

• Residual current < 100 μA (with transistor blocked).

• Capacitance load  0.5 μF at 55 V,  1.0 μF at 24 V

10 Endress+Hauser

• Residual voltage < 3 V (with transistor switched through);

Liquiphant M FTL50(H), FTL51(H)

52018763

52010285 / 52024216

FTL5#(H)- #######N3#
(M12x1)

FTL5#(H)- #######N3#
(M12x1)

FTL5#(H)- #######D3#
(Pg11)

FTL5#(H)- #######E3#
(NPT ½")

FTL5#(H)- #######C3#

(Ground) (Ground)

0.5 A

L– L–L+ L+

PE PE

+

–

R

33

0.5 A

22

11

+

–

R

(Ground) (Ground)

1

(BU)

3

(BN)

0.5 A

L– L–L+ L+

PE PE

2

(BK)

+

–

R

3

(BN)

0.5 A

1

(BU)

2

(BK)

+

–

R

(GN/YE)

(GN/YE)

0.5 A

L– L+

R

0.5 A

L– L+

2

(WT)

1

(BN)

3

(BU)

4

(BK)

2

(WT)

1

(BN)

3

(BU)

4

(BK)

R

oder

-30°C ≤ TA ≤ +70°C

-°C≤TA≤+ °C22 158

MAX

MIN

L+ +

3 2

I

L

I

L

< 100 μA

< 100 μA

L+ +

3 2

L+ +

2 3

L+ +

2 3

Electronics FEL52 (DC PNP, in compact housing)

Power supply Supply voltage: DC 10 to 55 V

 1.7 V, 0 to 400 Hz

Ripple:
Current consumption:  15 mA
Power consumption:  0.83 W
Reverse polarity protection
Overvoltage protection FEL52: overvoltage category III

Electrical connection Three-wire DC connection

Preferably used with
programmable logic
controllers (PLC),
DI module as per EN 61131-2.
Positive signal at switching
output of the electronics (PNP);
Output blocked on reaching point
level.

Note!
When using in conjunction with a
cable end (FTL5#(H)­#######C3#), the compact
housing should only be used in
enclosed areas.

Connector MAX MIN

Output signal With valve connector or cable tail

Endress+Hauser 11

I

L

< 100 μA

L00-FTL2xxxx-07-05-

xx-xx-000

= load current

(switched through)

= residual current

(blocked)

= lit

= unlit

L00-FTL5xxxx-04-05-xx-xx-014

Safety mode Level Output signal LEDs

green red

L00-FTL5xxxx-04-05-xx-xx-004a

With M12x1 connector 52010285 / 52024216 (without LEDs)

rd

ye

gn

MAX

MIN

L+ –

1 2

I

L

I

L

< 100 μA

< 100 μA

L+ –

1 2

L+ –

1 4

L+ –

1 4

ye 1

ye 2

gn

MAX

MIN

L+ –

1 2

I

L

I

L

< 100 μA

< 100 μA

L+ –

1 2

L+ –

1 4

L+ –

1 4

Safety mode Level Output signal LEDs

L00-FTL5xxxx-16-05-

xx-xx-002

Liquiphant M FTL50(H), FTL51(H)

I

L

< 100 μA

= load current

(switched through)

= residual current

(blocked)

= lit

= unlit

L00-FTL2xxxx-07-05-

xx-xx-000

With M12x1 connector 52018763 (with LEDs)

Safety mode Level Output signal LEDs

L00-FTL5xxxx-16-05-

xx-xx-001

I

L

< 100 μA

= load current

(switched through)

= residual current

(blocked)

L00-FTL5xxxx-04-05-xx-xx-010

= lit

= unlit

L00-FTL2xxxx-07-05-

xx-xx-000

Signal on alarm Output signal on power failure or in the event of damaged sensor: < 100 μA

Connectable load • Load switched via the transistor and separate PNP connection,

•Load current

 350 mA (pulsed overload and short-circuit protection)

 DC 55 V

• Residual current < 100 μA (with transistor blocked).

• Capacitance load

 0.5 μF at 55 V,  1.0 μF at 24 V

• Residual voltage < 3 V (with transistor switched through);

L00-FTL5xxxx-04-05-xx-xx-011

12 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

L1
L+

a

NO

a

NO

u

C

u

C

N

L–

r

NC

r

NC

0.5 A

PE

(Ground)

*

** **

12 678345

FEL54

U~ 19…253 V AC, 50/60 Hz
U– 19… 55 V DC

...

MAX

MIN

354

354

687

687

354

354

687

687

Electronic insert FEL54 (AC/DC with relay output)

Power supply Supply voltage: AC 19 to 253 V, 50/60 Hz or DC 19 to 55 V

Power consumption:
Reverse polarity protection
Overvoltage protection FEL54: overvoltage category III

Electrical connection Universal current connection with relay output

Power supply:
Please note the different
voltage ranges for AC and DC.
AC.

Output:
When connecting an instrument with
high inductance, provide a spark arrester
to protect the relay contact.
A fine-wire fuse (depending on the
load connected) protects the relay
contact on short-circuiting.
Both relay contacts switch simultaneously.

 1.3 W

Output signal

* When jumpered, the relay
output works with NPN logic.

** See "Connectable load"

= relay energized

= relay de-energized

= lit

= unlit

L00-FTL2xxxx-07-05-

xx-xx-001

L00-FTL5xxxx-04-05-xx-xx-002

Safety mode Level Output signal LEDs

green red

L00-FTL5xxxx-04-05-xx-xx-005

Signal on alarm Output signal on power failure or in the event of damaged sensor: relay de-energized

Connectable load • Loads switched via 2 floating change-over contacts (DPDT).

Endress+Hauser 13

 6 A (Ex de 4 A), U~  AC 253 V; P~  1500 VA, cos  = 1, P~  750 VA, cos  > 0.7

•I~

 6 A (Ex de 4 A) to DC 30 V , I%  0.2 A to 125 V

•I%

• When connecting a low-voltage circuit with double insulation according to IEC 1010, the following
applies: the sum of the voltages of the relay output and power supply is  300 V

• The electronic insert FEL52 DC-PNP is preferred for low DC load currents (e.g. when connecting to
a PLC)

• Relay contact material: silver/nickel AgNi 90/10

Electronic insert FEL55 (8/16 mA)

1 2

FEL55

–

Ex ia

+

E

X

E

X

U 11...36 V DC

–

+

–

+

R

R =

max

U–11 V

16.8 mA

PLC/SPS,
AI-Modules, ...

F=T50mA

MMAX

MIN

+
2 1

+
2 1

+
2 1

+
2 1

~16 mA

~8 mA

~8 mA

~16 mA

Power supply Supply voltage: DC 11 to 36 V

Power consumption: < 600 mW
Reverse polarity protection
Overvoltage protection FEL55: overvoltage category III

Electrical connection Two-wire connection for separate switching unit

For separate switching unit.
Signal transmission 16/8 mA on two-wire cabling.
For connection to programmable logic controllers
(PLC) for example, AI modules 4 to 20 mA to
EN 61131-2.
Output signal jump from high to low current on
point level.

Fuse required for non-Ex applications!
Only use power units with safe galvanic isolation (e.g.
SELV).

Liquiphant M FTL50(H), FTL51(H)

Output signal

~ 16 mA

~8 mA

= 16 mA ± 5 %

= 8 mA ± 6 %

Safety mode Level Output signal LEDs

= lit

= unlit

L00-FTL2xxxx-07-05-

xx-xx-000

Signal on alarm Output signal on power failure or in the event of damaged sensor: < 3.6 mA

Connectable load • R = (U - 11 V) : 16.8 mA

• U = connection voltage: DC 11 to 36 V (in wet environments DC 11 to 35 V)

Example: PLC with 250  with 2-wire version

250  = (U – 11V) / 16.8 mA

4.2 [/] = U – 11 V
U = 15.2 V

L00-FTL5xxxx-04-05-xx-en-000

green red

L00-FTL5xxxx-04-05-xx-xx-006

14 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

12

FEL56

–

EEx ia

H

L

+

E

X

E

X

I

Isolating amplifier
to
(NAMUR)

IEC 60947-5-6

MAX

MIN

+
2 1

+
2 1

+
2 1

+
2 1

0.6 …

1.0 mA

0.6 …

1.0 mA

2.2 …

2.8 mA

2.2 …

2.8 mA

Electronic insert FEL56 (NAMUR L-H edge)

Power supply Supply voltage: DC 8.2 V ±20 %

Power consumption: < 6 mW at I < 1 mA; < 38 mW at I = 2.8 mA
Connection data interface: IEC 60947-5-6

Electrical connection Two-wire connection for separate switching unit

For connecting to isolating amplifiers acc. to
NAMUR (IEC 60947-5-6), e.g. FTL325N,
FTL375N from Endress+Hauser.
Output signal jump from low to high current on
point level.

(L–H edge)

Connecting to multiplexer:
Set clock time to min. 2 s.

Output signal

Safety mode Level Output signal LEDs

= lit

= flashes

= unlit

L00-FTL5xxxx-07-05-

xx-xx-002

Signal on alarm Output signal in the event of damaged sensor: > 2.2 mA

Connectable load • See Technical Data of the isolating amplifier connected according to IEC 60947–5–6 (NAMUR)

L00-FTL5xxxx-04-05-xx-en-004

green red

L00-FTL5xxxx-04-05-xx-xx-003

Endress+Hauser 15

Electronic insert FEL58 (NAMUR H-L edge)

12

FEL58

–

EEx ia

H

L

+

E

X

E

X

I

Isolating amplifier
to
(NAMUR)

IEC 60947-5-6

MAX

MIN

+
2 1

+
2 1

+
2 1

+
2 1

2.2 …

3.5 mA

2.2 …

3.5 mA

0.6 …

1.0 mA

0.6 …

1.0 mA

Power supply Supply voltage: DC 8.2 V ±20 %

Power consumption: < 6 mW at I < 1 mA; < 38 mW at I = 3.5 mA
Connection data interface: IEC 60947-5-6

Electrical connection Two-wire connection for separate switching unit

For connecting to isolating amplifiers
as per NAMUR (IEC 60947-5-6), e.g. FTL325N,
FTL375N from Endress+Hauser.
Output signal jump from high to low current on
point level.

(H–L edge)

Additional function:
Test key on the electronic insert.
Pressing the key breaks the connection to the
isolating amplifier.

Note!

!

In Ex–d applications, the additional function
can only be used if the housing is not exposed
to an explosive atmosphere.

Liquiphant M FTL50(H), FTL51(H)

Output signal

Connecting to multiplexer:
Set clock time to min. 2 s.

= lit

= flashes

= unlit

L00-FTL5xxxx-07-05-

xx-xx-002

L00-FTL5xxxx-04-05-xx-en-002

Safety mode Level Output signal LEDs

green

yellow

L00-FTL5xxxx-04-05-xx-xx-007

Signal on alarm Output signal in the event of damaged sensor: < 1.0 mA

Connectable load • See Technical Data of the isolating amplifier connected according to IEC 60947–5–6 (NAMUR)

16 Endress+Hauser

• Connection also to isolating amplifiers which have special safety circuits (I > 3.0 mA)

Liquiphant M FTL50(H), FTL51(H)

–+

–

+

2

(WT)

1

(BN)

3

(BU)

4

(BK)

2

(WT)

1

(BN)

3

(BU)

4

(BK)

–

+

–

+

1

3

1

2

–

+

3

(BN)

1

(BU)

2

(BK)

52018763

52010285 / 52024216

FTL5#(H)- #######N3#
(M12x1)

FTL5#(H)- #######N3#
(M12x1)

FTL5#(H)- #######D3#
(Pg11)

FTL5#(H)- #######E3#
(NPT½")

FTL5#(H)- #######C3#

-30°C ≤ TA ≤ +70°C

-°≤TA≤+ °22 F 158 F

+

––

1

(BU)

MAX

MIN

+–
1 3

+–
1 2

2.2…

3.5 mA

2.2…

3.5 mA

0.6…

1.0 mA

0.6…

1.0 mA

+–
1 3

+–
1 2

Electronics FEL58 (NAMUR H-L edge, compact housing)

Power supply Supply voltage: DC 8.2 V ±20 %

Power consumption: < 6 mW at I < 1 mA; < 38 mW at I = 3.5 mA
Connection data interface: IEC 60947-5-6

Electrical connection Two-wire connection for separate switching unit

Connector MAX MIN

For connecting to isolating
amplifiers acc. to NAMUR
(IEC 60947-5-6), e.g. FTL325N,
FTL375N from Endress+Hauser.
Output signal jump from high to
low current on point level.

(H–L edge)

Additional function:
If the test magnet is held against
the
marking on the nameplate,
the output signal is inverted.

Output signal

Signal on alarm Output signal in the event of damaged sensor: < 1.0 mA

Connectable load • See Technical Data of the isolating amplifier according to IEC 60947–5–6 (NAMUR)

Endress+Hauser 17

!

Connecting to multiplexer:
Set clock time to min. 3 s.

The NAMUR interface has
a defined power consumption
rate.
Thus, it is not possible to use the
M12 connector
with an integrated LED
(52018763).

L00-FTL5xxxx-04-05-xx-xx-013

Safety mode Level Output signal LEDs

green

yellow

= lit

= flashes

= unlit

L00-FTL5xxxx-07-05-

Note!

xx-xx-002

L00-FTL5xxxx-04-05-xx-xx-007a

The light emitting diodes are not readable on the version FTL5x(H)-## ## ## #C 3# (compact IP66/68
316L with a 5 m cable).

• Connection also to isolating amplifiers which have special safety circuits (I > 3.0 mA)

Electronic insert FEL57 (PFM)

– +

78

33 34

37 38

d4 d2

z6d6

z4 z2

PFM
50 /
150 Hz

E

X

E

X

12

FEL57

EEx ia

Nivotester
FTL320
FTL325P 1CH
FTL325P 3CH

FTL370/372
FTL375P 1CH
Input 1

FTL372
FTL375P 2CH
Input 2

FTL375P 3CH
Input 3

Power supply Supply voltage: DC 9.5 to 12.5 V

Current consumption: 10 to 13 mA
Power consumption: < 150 mW
Reverse polarity protection

Electrical connection Two-wire connection for separate switching unit

For connecting to Endress+Hauser switching units
Nivotester FTL320, FTL325P, FTL370, FTL372,
FTL375P (also with proof test).

Output signal jump of the PFM signal from high to
low frequency when sensor is covered. Switching
between minimum/maximum safety in the
Nivotester.

Additional function “proof test”:
After interruption of the power supply,
a test cycle is activated
which checks the sensor and electronics
without any change in level.
Approved for overfill protection acc. to WHG
(German Water Resources Act).
The following can be switched at the electronic
insert:

– Standard

(STD):
Corrosion of the fork unlikely;
simulation approx. 8 s
tuning fork exposed – covered – exposed.
For proof testing, the Nivotester tests the
sensor's level notification function.

– Extended (EXT):

Corrosion of the fork possible;
Simulation approx. 41 s: tuning fork exposed –
covered – corroded – exposed.
For proof testing, the Nivotester tests the
sensor's level notification function and fault
notification (alarm) function.

The check is activated and monitored at the switching unit.

The twin-core connecting cable (instrument cable) with a cable resistance of
connected to the screw terminals (conductor cross-sections 0.5 to 2.5 mm / 0.02 to 0.1 in) in the
connection compartment. Protective circuits against reverse polarity, HF influences and overvoltage
peaks are installed.
Maximum cable length up to 1000 m (3281 ft).

A shielded connecting cable is recommended in the event of strong electromagnetic interference. Here
the shielding must be connected to the sensor and the power supply.

Liquiphant M FTL50(H), FTL51(H)

L00-FTL5xxxx-04-05-xx-en-003

 25  per core is

18 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

Fail-safe mode
set at
switching unit

MAX

MAX

MAX

MAX

MIN

MIN

MIN

MIN

Setting
at FEL57

STD

EXT

STD

EXT

STD

EXT

STD

EXT

Fork

free

free

covered

covered

free

free

covered

covered

Switching status of relay in switching unit
on = energised off = de-energised

Te st start End of test start
(power off) (power on)

> 3 s

on

on

off

off

off

off

on

on

off

off

off

off

~ 3 s on

~ 3 s on

~ 3 s on

~ 3 s on

~ 5 s off

~ 5 s off

off

off

~ 5 s off

~ 7 s off

~ 5 s off

~ 5 s off

~ 2 s on

~ 2 s on

~ 3 s on

on

~ 35 s on

~ 3 s off

~ 2 s off

~ 35 s off

off

~ 30 s on

on

on

on

off









150 Hz

50 Hz

Switching behavior of the connected device:

* De-energized on power supply failure

Please note this switching response and function of the plant especially when replacing a Liquiphant
incorporating electronic insert EL17Z or FEL37 with a Liquiphant M incorporating electronic insert
FEL57.

Output signal

Safety mode Level Output signal

(PFM)

LEDs

green

yellow

= lit

= unlit

L00-FTL2xxxx-07-05-

xx-xx-000

L00-FTL5xxxx-04-05-xx-xx-008

Signal on alarm Output signal on power failure or in the event of damaged sensor: 0 Hz

Connectable load • Floating relay contacts in the connected switching unit Nivotester FTL325P, FTL375P

• For contact load, see the Technical Data of the switching unit.

L00-FTL5xxxx-05-05-xx-en-000

Endress+Hauser 19

Electronic insert FEL50A (PROFIBUS PA)

PA– PA+

PROFIBUS PA

–

–

–

–

E

X

E

X

U– 9…32 V DC

...

12

FEL50A

Segment coupler

PLC

PROFIBUS DP

PROFIBUS PA

E

X

E

X

PC mit Commuwin II
Proficard oder Profiboard

Segmentkoppler

Power supply Bus voltage: DC 9 to 32 V

Bus current:

• 12.5 mA +/– 1.0
mA (software version: 01.03.00, hardware version: 02.00)

• 10.5 mA +/– 1.0
mA (software version: 01.03.00, hardware version: 01.00)

Electrical connection Two-wire connection for power supply and data transfer

For connecting to PROFIBUS PA

Additional functions:

– Digital communication enables the

representation, reading and editing
of the following parameters:
Fork frequency, switch-on frequency,
switch-off frequency, switch-on time and
switch-off time, status, measured value, density
switch.

Liquiphant M FTL50(H), FTL51(H)

– Matrix locking possible
– Switch to WHG mode possible

(WHG approval)

– For a detailed description, see BA00198F

L00-FTL5xxxx-04-05-xx-en-005

20 Endress+Hauser

L00-FTL5xxxx-04-05-xx-en-006

Liquiphant M FTL50(H), FTL51(H)

Output signal

Setting Level LEDs

green yellow

not
inverted

= lit inverted

= unlit

L00-FTL2xxxx-07-05-

xx-xx-000

Signal on alarm • Failure information can be opened using the following interfaces:

Yellow LED flashing, status code, diagnostic code; see BA00198F

FEL50A

OUT_D = 0
PA bus signal

OUT_D = 1
PA bus signal

OUT_D = 0
PA bus signal

OUT_D = 1
PA bus signal

L00-FTL5xxxx-04-05-xx-xx-009

Endress+Hauser 21

Electronic insert FEL50D (density)

– +

10 82

112 182

E

X

E

X

12

FEL50D

EEx ia

FML621

Endress+Hauser

On

FML621

–

+

Impuls

Power supply Frequency range: 300 to 1500 Hz

Signal level: 4 mA
Pulse height: 16 mA
Pulse width: 20 μS

Electrical connection Two-wire connection at Density Computer FML621

For connecting to the density and concentration computer
FML621.

The output signal is based on pulse technology.
With the aid of this signal, the fork frequency is constantly
forwarded to the switching unit.

Caution!

"

Operation with other switching units,
such as FTL325P, is not permitted.

This electronic insert cannot be installed in devices that were originally used as a point level switch.

Liquiphant M FTL50(H), FTL51(H)

Signal on alarm Output signal on power failure or in the event of damaged sensor: 0 Hz

Adjustment In the Liquiphant M modular system, the option of an adjustment is also provided in addition to the

electronics
(see feature 60: "Accessories").

There are three types of adjustment:

Standard adjustment (see ordering information for additional option, basic version A)

• Here, two fork parameters are determined to describe the sensor characteristics, indicated in the
adjustment report and provided with the product.
These parameters must be transmitted to the Density Computer FML621.

Special adjustment (see ordering information for additional option, special adjustment, density H
(K) or special adjustment, density H2O with 3.1 certificate (L))

• Here, three fork parameters are determined to describe the sensor characteristics, indicated in the
adjustment report and provided with the product.
These parameters must be transmitted to the Density Computer FML621.
Greater accuracy is achieved with this type of adjustment (see also "Performance characteristics").

Field Adjustment

!

• During field adjustment, a density value actually determined by the customer is entered and the
system is automatically adjusted to this value (wet adjustment).

Note!
More information on Liquiphant M Density is available in Technical Information TI00420F. This can
be downloaded from www.endress.com => Download.

TI420Fen004

2

O

22 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

Endress+Hauser

On

RMM621

*

*

Endress+Hauser

On

RMM621

1. 2. 3. 4.

PLC/SPS

PLC/SPS

FML621

FML621

E

X

E

X

Operating principle Measuring the density of a liquid medium in pipes and tanks. Also suitable for use in hazardous areas,

and preferably for applications in the chemical and food industry.

Light signals

TI420Fxx016

* Pressure and temperature information required depending on the application.

1. Liquiphant M sensor with electronic insert FEL50D (pulse output);

2. Temperature sensor (e.g. 4 to 20 mA output);

3. Pressure transmitter (4 to 20 mA output);

4. Liquiphant density and concentration computer FML621 with display and operating unit

LED Symbol Information

Yello

Measurement valid

w

Unstable process situation

Maintenance required

Green Power on

Power off

Red No fault

Maintenance required

Device failure

Endress+Hauser 23

Connection and function

13

(0,51)

mm (in)

*

Liquiphant M FTL50(H), FTL51(H)

Connecting cables • Electronic inserts: cross-section  2.5 mm (14 AWG); strand in ferrule as per DIN 46228

• Protective ground in housing: cross-section

 2.5 mm



(14 AWG)

• External equipotential bonding connection on housing: cross-section  4 mm(12 AWG)

Safety mode Minimum/maximum residual current safety selectable on electronic insert.

(with FEL57 on Nivotester only)

MAX = maximum safety:
The output switches to the power fail response when the fork is covered
For use with overfill protection for example

MIN = minimum safety:
The output switches to the power fail response when the fork is exposed
For use with dry running protection for example

Switching time When fork is covered: approx. 0.5 s

When fork is exposed: approx. 1.0 s
Additionally configurable for PROFIBUS PA:

0.5-60 s

Other switching times available on request.

Switch-on behavior When switching on the power supply, the output assumes the alarm signal.

 3 s it assumes the correct switching mode (exception: FEL57)

After

Performance characteristics

Reference operating conditions

Maximum measured error Under reference operating conditions: max. +/–1 mm (0.04 in)

Repeatability 0.1 mm (0.004 in)

Hysteresis approx. 2 mm (0.08 in)

Influence of medium temperature

Influence of medium density max. +4.8 to –3.5 mm ((0.5 to 1.5 g/cm

Ambient temperature: 23 °C (73 °F)

Medium temperature: 23 °C (73 °F)



Medium density (water): 1 g/cm

(SGU)

Medium viscosity: 1 mm/s (cSt)

Medium pressure pe: 0 bar (0 psi)

Sensor mounting: vertical from above

Density switch: to > 0.7 g/cm³ (SGU)

* Switch point under reference operating conditions

max. +1.8 to –2.8 mm (–50 to +150 °C / -58 to 302 °F)



(SGU))

max. +0.19 to -0.14 in

L00-FTL5xxxx-06-05-xx-xx-031

Influence of medium pressure max. 0 to –2.5 mm (–1 to 64 bar (-14.5 to 928 psi))

max. 0 to -0.1 in

Switching delay • When fork is covered: 0.5 s

• When fork is exposed: 1.0 s

• Available on request: 0.2 s; 1.5 s or 5 s (when the tuning fork is covered or exposed)

24 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

13

(0.51)

mm (in)

*

13

(0.51)

4

(0.16)

4

( 0.16)

mm (in)

*

*

Operating conditions

Installation Installation instructions

Switch points on the sensor depend on the mounting position, with reference to water,



Density 1 g/cm

Mounting from above Mounting from below Mounting from the side

(SGU), 23 °C (73 °F), pe 0 bar (0 psi).

L00-FTL5xxxx-06-05-xx-xx-051

!

Note!

• The switch points of the LiquiphantM are at other positions to those of the previous version
LiquiphantII.

• Minimum distance between the tip of the fork and the tank wall or pipe wall: 10 mm

Examples of mounting Examples of mounting with regard to the viscosity  of the liquid and the tendency to form buildup

Optimum mounting, without problem even with high viscosity:

Position the fork so that the narrow edge of the tines is vertical to ensure that the liquid can run off
easily.

L00-FTL5xxxx-11-05-xx-xx-001

Vertical from above Flush-mounted from the side

With buildup on the tank walls:

* Ensure that there is sufficient distance between the buildup expected on the tank wall and the fork.

L00-FTL5xxxx-11-05-xx-xx-002

Vertical from above Protruding into the tank from the side

Endress+Hauser 25

Liquiphant M FTL50(H), FTL51(H)

min. 25

*

*

Mounting positions in the case of low viscosity up to 2000 mm/s (cSt):

* Deburr the nozzle surfaces

Mounting in piping from 2"

Flow velocities up to 5 m/s for viscosity of 1 mm/s (cSt) and density 1 g/cm (SGU).
(Check the function for other medium conditions.)

L00-FTL5xxxx-11-05-xx-en-003

Dynamic load

Support the Liquiphant M FTL51(H) in the event of a severe dynamic load.

L00-FTL5xxxx-11-05-xx-xx-004

L00-FTL5xxxx-11-05-xx-xx-005

26 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .

.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..

...........................................

.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..

.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..

.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .

...........................................

.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .

T

a

T

p

70

(158)

T

a

50

(122)

0

(32)

*

100

(212)

150

(302)

T

p

90

(194)

-50

(-58)

**

-50

(-58)

0

(32)

50

(122)

°C (°F)

-30

(-22)***

****

-40

(-40)

Ensure adequate space outside the tank for
mounting, connection and configuration.

Orientation • FTL50(H) and FTL51(H) with short pipe up to approx. 500 mm (19.7 in): any position

• FTL51(H) with long pipe: vertical

Environment

L00-FTL5xxxx-11-05-xx-xx-006

Ambient temperature range Permitted ambient temperature Ta at the housing depending on the medium temperature Tp in the

tank:

*

Additional temperature range for devices with a temperature spacer or pressure-tight

L00-FTL5xxxx-05-05-xx-xx-001

feedthrough.

**

Maximum ambient temperature with FEL50D/FEL50A in hazardous areas.

***

The following applies for devices with a compact housing according to version D3, E3: -30 °C 
Ta +70 °C

****

The following applies for the F16 housing: -40 °C Ta +70 °C

Storage temperature –50 to +80 °C (-58 to 176 °F)

Installation height as per IEC61010-1 Ed.3

Climate class Climate protection to IEC 68, Part 2-38,

Endress+Hauser 27

Up to 2000 m (6600 ft) above sea level.

Can be extended up to 3000 m (9800 ft) above sea level if overvoltage protection is used, for example
HAW562 or HAW569.

Fig. 2a

Liquiphant M FTL50(H), FTL51(H)

Degree of protection

Types of housing IP65 IP66* IP67* IP68* IP69 NEMA

type**

Compact housing with valve connector
Pg11/NPT ½

Compact housing with 5 m (16 ft) cable
tail

Compact housing with M12x1
connector (52010285) 316L (metal)

Compact housing with elbowed
connector (52024216) / L= 5 m (16 ft),
without integrated LEDs

Compact housing with elbowed
connector (52018763) / L= 5 m (16 ft),
with integrated LEDs

Polyester housing F16 – X X – – 4X
Stainless steel housing F15 – X X – – 4X
Aluminum housing F17 – X X – – 4X
Aluminum housing F13**** – X – X*** – 4X/6P
Stainless steel housing F27 – X – X – 4X/6P
Aluminum housing T13

with separate connection compartment
(Ex d)

* As per EN60529
** As per NEMA 250
*** only with M20 cable entry or G1/2 thread
**** F13 housing only in conjunction with XP or Ex d approval

X–– –––

–X– X––

–X– X––

–X– XX–

–X– XX–

–X– X***–4X/6P

Vibration resistance As per IEC 68, parts 2-6 (10 to 55 Hz, 0.15 mm (0.01 in), 100 cycles)

In the event of increased vibrations, the following additional option is recommended: feature "060"
version "P" 100 bar (1450 psi) process pressure.

Electromagnetic compatibility

Interference emission to EN 61326, Electrical Equipment Class B
Interference immunity to EN 61326; Annex A (Industrial) and NAMUR Recommendation NE 21
(EMC)

28 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

**

pp

ee

barbar

(p(psi)si)

TT

pp

°C°C

(°F)(°F)

6464

(928)(928)

–50–50

(–58)(–58)

150150

(300)(300)

00

(32)(32)

–1–1

(–14.5)(–14.5)

100100

(1450)(1450)

Medium conditions

Medium temperature –50 to +150 °C (-58 to 302 °F); for exceptions, see "Process connections"

Thermal shock

Medium pressure p

 120 °C/s (248 °F/s)

e

L00-FTL5xxxx-05-05-xx-xx-003

* Permitted pressure rating when the "100 bar (1450 psi)" option is selected (see "Product structure
FTL51",
feature 060, from  ä 43).
See "Process connections"  ä 33 for exceptions.
Canadian CRN approval: Additional details on maximum pressure values are available in the download
area of the product page at "www.endress.com".

Please refer to the standards listed for the permitted pressure values of the flanges at higher
temperatures:

• pR EN 1092-1: 2005
With regard to their stability-temperature property, the materials 1.4435 and 1.4404 are identical
and are grouped together in EN 1092-1 Tab. 18 under 13E0. The chemical composition of the two
materials can be identical.

• ASME B 16.5 - 2013 Tab. 2-2.2 F316

• ASME B 16.5 - 2013 Tab. 2-3.8 N10276

• JIS B 2220

The lowest value from the derating curves of the device and selected flange applies in each case.

Test pressure p

= 64 bar (928 psi):

e

•

 100 bar (1450 psi) or 1.5 times the medium pressure p

e

• Sensor burst pressure at 200 bar (2900 psi)

p

= 100 bar (1450 psi):

e

 150 bar (2175 psi) or 1.5 times the medium pressure p

•

)

e

• Sensor burst pressure at 400 bar (5800 psi)

!

Note!
The device function is restricted during pressure testing.

State of aggregation Liquid

3

Density 0.7 g/cm

(SGU) = delivery status

0.5 g/cm3* (SGU) can be adjusted via switches

Viscosity

Solids content  ø5 mm (0.2 in)

* Density settings for the compact housing on request

 10,000 mm

2

/s (cSt)

Lateral loading capacity  75 Nm

Endress+Hauser 29

Liquiphant M FTL50(H), FTL51(H)

+ 140
(5.51)

Isolation

Mechanical construction

!

Design Summary of all electrical and mechanical versions

L00-FTL5xxxx-03-05-xx-xx-019 L00-FTL5xxxx-03-05-xx-xx-001 L00-FTL5xxxx-03-05-xx-xx-002 L00-FTL5xxxx-03-05-xx-xx-031 L00-FTL5xxxx-03-05- xx-xx-033 L00-FTL 5xxxx-03-05-xx-xx-004

Compact

Pipe housing (316L)

F16

Polyester (PBT)

Note!
2D and 3D drawings containing individual dimensions can be generated and downloaded in the
Configurator on the product pages of the Liquiphant FTL5x at www.endress.com.

Housing

F15

Stainless steel (316L)

F17

Aluminum
Housing coated

F27
Stainless steel (316L)

F13

Aluminum
(also for Ex d/XP),
housing coated

T13

Aluminum with separate
connection compartment
(also Ex de and Ex d), housing
coated

Plug-in electronic inserts to mount in the housing

FEL51*:
FEL52*:
FEL54:
FEL55:
FEL56:

L00-FTL5xxxx-03-05-xx-xx-000

* Electronics also available as compact housing. The electronics cannot be exchanged!
If the housing is ordered with a cable gland: the cable gland is ready-mounted upon delivery. A second cable
gland is included in conjunction with FEL54.

FEL58*:
FEL57:
FEL50A:
FEL50D:

Two-wire AC connection
Three-wire DC connection PNP
Universal current connection, 2 relay outputs
Output 16/8 mA for separate switching unit
Output 0.6 to 1.0 / 2.2 to 2.8 mA for separate switching unit (NAMUR)
Output 2.2 to 3.5 / 0.6 to 1.0 mA for separate switching unit (NAMUR)
Output 150/50 Hz, PFM, for separate switching unit (Nivotester)
Digital communication PROFIBUS PA
Pulse output for Density Computer FML621

Temperature spacer and pressure-tight feedthrough

Temperature spacer (optional)
Provides sealed insulation for the vessel and
normal ambient temperatures for the housing.

Pressure-tight feedthrough (optional)
Protects the housing from pressures up to 100 bar
(1450 psi) if the sensor is damaged. Provides
sealed insulation for the vessel and normal
ambient temperatures for the housing.

L00-FTL5xxxx-06-05-xx-xx-091

30 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

*

*

*

ø40

(1.57)

133

(5.24)

30

(1.18)

40

(1.57)

141

(5.55)

166

(6.54)

ø40

(1.57)

ø40

(1.57)

1.

2.

3.

*

ø85

(3.35)

£ 76

(2.99)

17.5

(0.69)

£ 40.7

(1.6)

£ 155

(6.1)

Process connections

L00-FTL5xxxx-03-05-xx-xx-006 L00-FTL5xxxx-03-05-xx-xx-007 L00-FTL5xxxx-03-05-xx-xx-008 L00-FTL5xxxx-03-05-xx-xx-009

G ¾, DIN ISO 228/I
R ¾, EN10226
NPT ¾, ASME B 1.20.1
(AF 32)

G 1, DIN ISO 228/I
R 1, EN10226
NPT 1, ASME B 1.20.1
(AF 41)

Diverse
hygienic and
aseptic
connections

Sensors

Compact, with extension pipe up to 3 m (up to 6 m on request)
or special "length L II" (see  ä 33ff.)

Flanges as per DIN,
ASME,
JIS
from DN 25 / 1"

Compact Length L Length L II

pe = bar/psi 64/928 64/928 64/928

Dimensions Dimensions in mm (in)!

Housing FTL50(H), FTL51(H) with sensor FTL50(H)

Compact housing, primarily for
hygiene applications

1. 5 m cable

2. M12 connector

3. Pg11/NPT ½ connector

Polyester housing F16

L00-FTL5xxxx-03-05-xx-xx-018

100/1450 100/1450

L00-FTL5xxxx-06-05-xx-xx-085

L00-FTL5xxxx-06-05-xx-xx-086

Endress+Hauser 31

F15 stainless steel housing primarily for

*

ø76

(2.99)

£ 64

(2.52)

£ 150

(5.91)

~25

(0.98)

*

ø80

(3.15)

£ 60

(2.36)

£ 69

(2.72)

£ 169

(6.65)

10

(0.39)

ø21.5
(0.85)

*

£ 173

(6.81)

ø80

(3.15)

£ 69

(2.72)

£ 60

(2.36)

10

(0.39)

ø21.5
(0.85)

*

£ 65

(2.56)

£ 97

(3.82)

£ 190

(7.48)

hygiene applications

Liquiphant M FTL50(H), FTL51(H)

Aluminum housing F17

Stainless steel housing (316L) F27
Aluminum housing F13

L00-FTL5xxxx-06-05-xx-xx-087

L00-FTL5xxxx-06-05-xx-xx-088

Aluminum housing T13

L00-FTL5xxxx-06-05-xx-xx-089

with separate connection compartment

32 Endress+Hauser

L00-FTL5xxxx-06-05-xx-xx-090

* See "Process connections"

Liquiphant M FTL50(H), FTL51(H)

50.5

(2.19)

66.5

(2.62)

SW/AF

32

50.5

(2.19)

66.5

(2.62)

SW/AF

32

69

(2.72)

50.5

(1.99)

SW/AF

41

80

(3.15)

61.3

(2.41)

SW/AF

41

R: 66.5

(2.62)

50.5

(1.99)

NPT: 71.5

(2.81)

SW/AF

32

NPT: 75.5

(2.97)

50.5

(1.99)

R: 69

(2.72)

SW/AF

41

!

Note!
The switch points of the LiquiphantM are at other positions to those of the previous version
LiquiphantII.

Process connections for FTL50(H) and FTL51(H)

Process connection Dimensions Accessories Pressure

Temperature

G ¾

DIN ISO 228/l
with defined
thread start;
Flat seal to DIN 7603:
supplied

G ¾

DIN ISO 228/l
with defined
thread start

for flush-mounted
installation in
weld-in adapter

G 1

DIN ISO 228/l

GQ2
GQ6

GQ2
GQ6

GR2
GR6

L00-FTL5xxxx-06-05-xx-xx-092

L00-FTL5xxxx-06-05-xx-xx-093

Weld-in adapter

(with defined
thread start)
with silicone O­ring
only FTL50,
FTL50H

See "Accessories"
In conformity with
FDA*

 100 bar / only FTL51
( 1450 psi)

 150 °C (302 °F)

 25 bar (363 psi)
 150 °C (302 °F)

 40 bar (580 psi)
 100 °C (212 °F)

 100 bar / only FTL51

(1450 psi)

Flat seal to DIN 7603:
supplied

G 1

DIN ISO 228/l
with defined
thread start

With seal surface
for flush-mounted
installation in
weld-in adapter

NPT ¾

ASME B 1.20.1

or

R ¾

DIN/EN 10226

NPT1

ASME B 1.20.1

GW2

GM2
GM6

GE2
GE6

GN2
GN6

L00-FTL5xxxx-06-05-xx-xx-094

L00-FTL5xxxx-06-05-xx--095

L00-FTL5xxxx-06-05-xx-xx-096

Weld-in adapter

(with defined
thread start)
with silicone O­ring

See "Accessories"
In conformity with
FDA*

 150 °C (302 °F)

25 bar
150 °C (302 °F)

40 bar (580 psi
100 °C (212 °F)

 100 bar / only FTL51

(1450 psi)

150 °C (302 °F)

 100 bar / only FTL51

(1450 psi)

(363 psi)

)

or

GF2

R 1

DIN/EN 10226

Endress+Hauser 33

GF6

L00-FTL5xxxx-06-05-xx-xx-097

 150 °C (302 °F)

Liquiphant M FTL50(H), FTL51(H)

66.5

(2.62)

66.5

(

2.62)

D

66.5

(2.62)

D

34

(. )134

66.5

(2.62)

55.5

(

2.19)

Process connection Dimensions Accessories Pressure

Temperature

* FDA-compliant material in accordance with 21 CFR Part 177.2600 (silicone)

Flanges

ASME B 16.5
EN 1092-1
(DIN 2527 B)
JIS B2220

Tri-Clamp

ISO 2852 DN25-38
(1 to 1 ½")
DIN 32676 DN25-40
ø D = 50.5 mm
(1.99 in)

Seal
A##
B##
C##

depending on

design

installed on site
F##
N##
K##

L00-FTL5xxxx-06-05-xx-xx-098

For higher chemical-resistance, AlloyC22-plated flanges are available. The flange
carrier material is made of 316L and is welded with a 2 to 3 mm (0.08 to 0.12 in) thick
AlloyC22 disk.

Clamping ring and
TC2
TE2

front seal

installed on site**

See nominal pressure
of flange, however
 100 bar (1450 psi)
(only FTL51)

 150 °C (302 °F)

 25 bar (363 psi)
 150 °C (302 °F)

ISO 2852 DN40-51
(2")
DIN 32676 DN50
ø D = 64.0 mm
(2.52 in)

Tri-Clamp NA
Connect only for

FTL50H, FTL51H
ISO 2852 DN25-38
(1 to 1 ½")
DIN 32676 DN25-40
ø D = 50.5 mm
(1.99 in)

ISO 2852 DN40-51
(2")
DIN 32676 DN50
ø D = 64.0 mm
(2.52 in)

Threaded pipe joint

DN 32
DN 40
DN 50
DIN 11851

with thread adapter
nut

Flush-mounted for
weld-in adapter

Factory standard
Endress+Hauser with
silicone seal
and thread adapter
nut:
supplied

L00-FTL5xxxx-06-05-xx-xx-099

TE2: Mounting with NA connector only in conjunction with housing T13, F13 and
compact housing.
TC2: Mounting with NA connector only in conjunction with compact housing.

 25 bar (363 psi)
 150 °C (302 °F)

TD2
TF2

Clamping ring and

front seal

installed on site**

L00-FTL5xxxx-06-05-xx-xx-099

TD2, TF2: Mounting with NA connector only in conjunction with housing F15, F16 and
F17.

DN 32, DN 40:
 40 bar (580 psi) up to
100 °C (212 °F)
 25 bar (363 psi) up to

MA2
MC2
ME2

Sealing ring with

collar,

installed on site**

140 °C (284 °F)

DN 50:

L00-FTL5xxxx-06-05-xx-xx-100

 25 bar (363 psi)
 140 °C (284 °F)

EE2

Weld-in adapter

(fork can be

 40 bar (580 psi)
 100 °C (212 °F)

positioned)

 25 bar (363 psi)

See "Accessories"

 150 °C (302 °F)

In conformity with

L00-FTL5xxxx-06-05-xx-xx-101

FDA*

34 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

66.5

(2.62)

66.5

(2.62)

66.5

(

2.62)

56.5

(

2.22)

ø68

(2.68)

46

(1.81)

51.5

(2.03)

Process connection Dimensions Accessories Pressure

Temperature

Aseptic

DN 50

HE2

sealing ring
installed on site**

 25 bar (363 psi)
 140 °C (284 °F)

DIN 11864-1
Form A
for pipe DIN 11850
with thread adapter
nut

L00-FTL5xxxx-06-05-xx-xx-102

DRD

With clamped flange

PE2

Welding flange
with

 40 bar (580 psi)
100 °C (212 °F)

PTFE flat seal
(fork can be
positioned)

 25 bar (363 psi)
 150 °C (302 °F)

See "Accessories"

L00-FTL5xxxx-06-05-xx-xx-103

(or installed on
site)**

In conformity with
FDA*

* FDA-compliant material in accordance with 21 CFR Part 177/2600 (silicone), 21 CFR Part 177.1550 (PTFE)
** The maximum temperature and the maximum pressure are dependent on the clamping ring used and the seal
used. The lowest value applies in each case.

SMS

2"

UE2

sealing ring
installed on site**

 25 bar (363 psi)
 140 °C (284 °F)

(DN 51)
with thread adapter
nut

L00-FTL5xxxx-06-05-xx-xx-104

Varivent

for piping

 DN 65
 O.D. 3"
 I.P.S. 3"

WE2

Clamping ring and
O-ring seal,
installed on site**

However, see
specification as per
Tuchenhagen
VARIVENT-Inline
housing:

 25 bar (363 psi)
 150 °C (302 °F)

L00-FTL5xxxx-06-05-xx-xx-105

Ingold fitting

TT2  16 bar (232 psi)

 150 °C (302 °F)

DN 25
Fitting length 46 mm
(2.52 in)

Thread adapter nut G
1 ¼

with O-ring seal,
EPDM (FDA­compliant, USP Class

L00-FTL5xxxx-06-05-xx-xx-106

VI*)

* FDA-compliant material in accordance with 21 CFR Part 177/2600 (EPDM)
** The maximum temperature and the maximum pressure are dependent on the clamping ring used and the seal
used. The lowest value applies in each case.

Endress+Hauser 35

Liquiphant M FTL50(H), FTL51(H)

L

ø21.5
(0.85)

L

L

Sensor length L for FTL51 and FTL51H, depending on process connection

Thread: G ¾

G 1

L00-FTL5xxxx-06-05-xx-xx-107

From seal surface of
thread adapter

Customized length L:

• 148 mm to 3000 mm (6 to 115
in); special version (TSP) on request up to 6000 mm (235
in)

• Length tolerances L: < 1 m (–5 mm), 1 to 3 m (–10 mm) / < 3.3 ft (-0.2 in), 3.3 to 9.8 ft (-0.39 in)

Thread: NPT ¾

NPT1
R ¾
R 1

L00-FTL5xxxx-06-05-xx-xx-017

From lower edge of
thread

Flanges and
flange-like process connections

L00-FTL5xxxx-06-05-xx-xx-018

!

Note!
The switch points of the LiquiphantM are at other positions to those of the previous version
LiquiphantII.
Special length "L II":
With vertical mounting from above approximately the same switch point as for the Liquiphant II
FTL360, FTL365, FDL30, FDL35

"L II" depends on process connection:

L = 115 mm (4.53 in) for flanges and flange-like process connections such as Clamp, DRD...
L = 99 mm (3.9 in) for threads NPT and R (BSPT)
L = 118 mm (4.65 in) for threads G1 (BSP 1)
L = 115 mm (4.53 in) for threads G ¾ (BSP ¾)
L = 104 mm (4.09 in) for flush-mounted 1" (G1" Endress+Hauser welding bosses)

Weights See "Ordering information"  ä 43ff

Materials and surfaces Material specifications as per AISI and DIN-EN.

Parts in contact with process

• Process connection and extension pipe:
–FTL5x  316L (1.4404 or 1.4435) optional 2.4602 (AlloyC22)
–FTL5xH  316L (1.4435)

• Tuning fork: 316L (1.4435) optional 2.4602 (AlloyC22)

•Flanges:
– ASME: 316/316L
– EN: 316L (1.4404)
– JIS: 316L (1.4404)

• Flange plating: AlloyC22 (2.4602)

• Flat seal for process connection G ¾ or G 1: elastomer fiber, asbestos-free

Surface roughness

Choice of mechanically polished surface roughness (version  probe length  type):

• Ra < 1.5 m (59.1 μin), with EHEDG approval

36 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

!

• Ra < 0.3 m (11.8 μin), 3-A and EHEDG approval and CoC-ASME-BPE

Note!
The surface is electropolished if the additional option "B"
(CoC - ASME BPE) is selected in addition to surface roughness quality Ra < 0.3 m (11.8 μin). The
surface roughness is then: Ra < 0.38 m (15.0 μin).
With this combination, the wetted parts are made of 316L (1.4435) in accordance with BN2 (delta­ferrite content < 1 %).

Parts with no process contact

• Tuning fork/housing seal: EPDM

• Temperature spacer: 316 L (1.4435)

• Pressure-tight feedthrough: 316L (1.4435)

• Ground terminal on housing (external): 316L (1.4404)

• Cable glands
– Housing F13, F15, F16, F17: polyamide (PA)

With B or C approval ( ä 43 ordering information): nickel-plated brass
– Housing F27: polyamide PA, with approval "B" or "C" 316L (1.4435)
– Housing T13: nickel-plated brass

• Polyester housing F16: PBT-FR with PBT-FR cover or with PA12 transparent cover
– Cover seal: EPDM
– Nameplate glued: polyester film (PET)
– Pressure compensation filter: PBT-GF20

• Stainless steel housing F15: 316L (1.4404)
– Cover seal: silicone
– Safety claw: 304 (1.4301)
– Pressure compensation filter: PBT-GF20, PA

• Aluminum housing F17/F13: EN-AC-AlSi10Mg, plastic-coated
– Nameplate: aluminum, anodized
– Cover seal: EPDM
– Safety claw: nickel-plated brass
– Pressure compensation filter: silicone

• Stainless steel housing F27: 316L
– Nameplate: 316L (1.4404)
– Cover seal: FVMQ (optional: EPDM seal available as spare part)
– Safety claw: 316L (1.4435)

• Aluminum housing T13: EN-AC-AlSi10Mg, plastic-coated,
– Nameplate: aluminum, anodized
– Cover seal: EPDM
– Safety claw: nickel-plated brass

• Compact housing (valve connector or M12 connector): 316L (1.4435)

Process connections • Parallel thread G ¾, G 1 to DIN ISO 228/I with flat seal to DIN 7603

• Tapered thread R ¾, R 1 to EN10226

• Tapered thread ¾ -14 NPT, 1 - 11½ NPT as per ASME B 1.20.1

• Flush-mounted installation with weld-in adapter to factory standard Endress+Hauser (G ¾, G 1)

• Flush-mounted installation with weld-in adapter to factory standard Endress+Hauser (1"),
sensor can be positioned

• Tri-Clamp 1½", 2" to ISO 2852

• Threaded pipe joint DN 32, 40, 50 to DIN 11851

• Aseptic connection DN 50 to DIN 11864-1
Form A for pipe DIN 11850

• SMS connection 2" (DN 51)

•DRD flange

•Varivent

• Flanges: as per EN/DIN 1092-1 from DN 25, as per ASME B 16.5 from 1", as per JIS B2220 (RF)

• Ingold DN25 fitting length 46 mm (1.81 in) with thread adapter nut G1 ¼

Further details at Ordering information  ä 43.

®

DN 50 (50/40) to factory standard Tuchenhagen

Endress+Hauser 37

Human interface

Min

Max1

2

>0,7

>0,5

FEL51

12

L1 N U~

19...253V AC
50/60Hz

I max : 350mA

Connecting terminal LEDs Switches

HW

OFF

ON

Address

SW

12345678

FEL50A

12

PA– PA+

Connecting terminal LEDs Switches

–

Impuls

FEL50D

+

GNYERD

Liquiphant M FTL50(H), FTL51(H)

Electronic inserts

With FEL51, FEL52, FEL54, FEL55:

• 2 switches for safety mode and density change

• green LED to indicate operational status

• red LED to indicate the switching status,
flashes in the event of corrosion damage on sensor
or if the electronics are defective

With FEL56:

• 2 switches for safety mode and density change

• green LED flashes to indicate operational status

• red LED to indicate the switching status,
flashes in the event of corrosion damage on sensor
or if the electronics are defective

With FEL57:

• 2 switches for density change and
Testing

• green LED to indicate operational status

• yellow LED to indicate the covered status,
flashes in the event of corrosion damage on sensor
or if the electronics are defective

With FEL58:

• 2 switches for safety mode and density change

•green LED
– flashes quickly to indicate operational status,
– flashes slowly in the event of corrosion damage to the

sensor of if the electronics are defective

• yellow LED to indicate the switching status,
Test key – breaks the cable connection

With FEL50A:

• 8 switches for configuring the device address

• green LED to indicate operational status,
pulsing to indicate communication;

• yellow LED to indicate the switching status,
flashes in the event of corrosion damage on sensor
or if the electronics are defective

L00-FTL5xxxx-03-05-xx-en-001

L00-FTL5xxxx-03-05-xx-xx-013

With FEL50D:

L00-FTL5xxxx-03-05-xx-en-002

• yellow LED: to indicate the validation of the
measurement

• green LED: to indicate the operational status

• red LED: to indicate faults

Compact housing Function test with test magnet

Versions AC, DC-PNP and NAMUR:

During the test, the current state of the electronic switch is reversed.

Hold the test magnet against the marking on the nameplate: The switching status is changed.

38 Endress+Hauser

TI328Fxx004

Liquiphant M FTL50(H), FTL51(H)

gn gn

rd

AC/DC NAMUR

ye

L00-FTL5xxxx-19-05-xx-xx-001

Light signals

Versions AC and DC-PNP with valve connector or cable tail

Green light (gn) lights up (AC/DC):

Liquiphant M is connected to the power supply and is operational.

Green light (gn) flashing (NAMUR):

Liquiphant M is connected to the power supply and is operational.

Red light (rd) lights up (AC/DC):

MAX application mode (overfill protection): sensor is immersed in liquid.
MIN application mode (dry running protection): sensor is not immersed in liquid.

Yellow light (ye) lights up (NAMUR):

MAX application mode (overfill protection): sensor is not immersed in liquid.
MIN application mode (dry running protection): sensor is immersed in liquid.

Red light (rd) flashing (AC/DC):

Liquiphant M has detected a fault.

L00-FTL5xxxx-07-05-xx-xx-005

Endress+Hauser 39

Version NAMUR and DC-PNP with M12x1 round connector 316L

rdrd

gngn

yeye

ye 2

ye 1

gn

Green light (gn) lights up (DC-PNP):

Liquiphant M is connected to the power supply and is operational.

Liquiphant M FTL50(H), FTL51(H)

L00-FTL5xxxx-07-05-xx-xx-003

Green light (gn) flashing with 1 Hz (NAMUR):

Liquiphant M is connected to the power supply and is operational.

Yellow light (ye) lights up (DC-PNP):

Sensor is immersed in liquid.

Yellow light (ye) lights up (NAMUR):

MAX application mode (overfill protection): sensor is not immersed in liquid.
MIN application mode (dry running protection): sensor is immersed in liquid.

Red light (rd) flashing (DC-PNP):

Liquiphant M has detected a fault.

Green light (gn) flashing with 0.3 Hz (NAMUR):

Liquiphant M has detected a fault.

Version DC-PNP with M12x1 round connector 316L

L00-FTL5xxxx-07-05-xx-xx-004

40 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

Green light (gn) lights up:

Liquiphant M is connected to the power supply and is operational.

Yellow light (ye 1) lights up:

MAX application mode (overfill protection): sensor is not immersed in liquid.
MIN application mode (dry running protection): sensor is not immersed in liquid.

Yellow light (ye 2) lights up:

MAX application mode (overfill protection): sensor is immersed in liquid.
MIN application mode (dry running protection): sensor is immersed in liquid.

Green light (gn) lights up, both yellow lights (ye 1+2) do not light up:

Liquiphant M has detected a fault.

Operating concept Onsite configuration

Certificates and approvals

CE mark The measuring system meets the legal requirements of the applicable EC Directives. These are listed in

the corresponding EC Declaration of Conformity along with the standards applied.
Endress+Hauser confirms successful testing of the device by affixing to it the CE mark.

RoHS The measuring system complies with the substance restrictions of the EU Directive on the restriction

of the use of certain hazardous substances 2011/65/EU (RoHS 2).

RCM-tick mark The product or measuring system supplied complies with the regulations of the Australian

Communications and Media Authority (ACMA) for network integrity, performance characteristics and
health and safety requirements. The specifications for electromagnetic compatibility, in particular, are
observed. The products bear the RCM-tick mark on their nameplate.

A0029561

EAC conformity The measuring system meets the legal requirements of the applicable EAC Directives.

These are listed in the corresponding EAC Declaration of Conformity along with the standards applied.

Endress+Hauser confirms successful testing of the device by affixing to it the EAC mark.

CRN approval Versions with a CRN approval (Canadian Registration Number) are marked with a "*" in ordering

information feature 20 "process connection" (s. Seite 43 ff.). CRN-approved devices are assigned the
registration number CRN: 0F10904.5CADD1 on the nameplate.

Pressure Equipment Directive 2014/68/EU (PED)

Pressure instruments with permitted pressure ≤ 200 bar (2 900 psi)

Pressure instruments with permitted pressure ≤ 200 bar (2 900 psi) Pressure instruments with a
flange and threaded boss that do not have a pressure-bearing housing do not fall within the scope of
the Pressure Equipment Directive, irrespective of the maximum permitted pressure.

Reason:

According to Article 2, point 5 of EU Directive 2014/68/EU, pressure accessories are defined as
"devices with an operational function and having pressure-bearing housings".
If a pressure instrument does not have a pressure-bearing housing (no identifiable pressure chamber
of its own), there is no pressure accessory present within the meaning of the Directive.

Endress+Hauser 41

Liquiphant M FTL50(H), FTL51(H)

Note:

A separate analysis must be performed for pressure instruments that are part of safety equipment
designed to protect a pipe or vessel from exceeding allowable limits (safety accessory in accordance
with Pressure Equipment Directive 2014/68/EU, Article 2, point 4).

Process seal according to ANSI/ISA 12.27.01

Practice in North America for the installation of process seals
Endress+Hauser devices are designed as either single seal or dual seal devices with an alarm in
accordance with ANSI/ISA 12.27.01. This means that the user does need to install for an external
secondary process seal in the thermowell which is required in ANSI/NFPA 70 (NEC) and CSA 22.1
(CEC). These devices comply with installation practice in North America and enable very safe, low-cost
installation in pressurized applications with hazardous media.
Further information is provided in the Safety Instructions (XA) for the specific device  ä 58 ff.

Product Type Max. process pressure Marking Listing

Liquiphant M FTL50-S/T##...

FTL50-P/Q/R##...
FTL51-S/T##...

FTL51-P/Q/R##...
FTL50H-S/T##...

FTL50H-P/Q/R##...
FTL51H-S/T##...

FTL51H-P/Q/R##...

64 bar (928 psi) Single Seal CSA/FM

64/100 bar
(928/1450 psi)

64 bar (928 psi) Single Seal CSA/FM

64 bar (928 psi) Single Seal CSA/FM

Single Seal CSA/FM

General approvals The following approvals are available for Liquiphant M FTL50H, FTL51H:

• EHEDG: certification (from TNO, The Netherlands), Report No. V99.394:

• 3A: 3A certificate (USA), Authorization no. 459: 74-06 Sensors and Sensor Fittings and Connections

• Certificate of Compliance as per ASME BPE-2012. (Order code: additional option = B)

Process connections Order code ASME BPE

Thread ISO228 G3/4, 316L, installation
Thread ISO228 G1, 316L, installation
Accessories: weld-in adapter

Tri-Clamp ISO2852 DN25-38 (1 to 1-1/2"), 316L
Tri-Clamp ISO2852 DN40-51 (2"), 316L

DIN11851 DN32 PN25 slotted nut, 316L
DIN11851 DN40 PN25 slotted nut, 316L
DIN11851 DN50 PN25 slotted nut, 316L

Flush-mounted, 316L, installation
Accessories, weld-in adapter

DIN11864-1 A DN50 pipe DIN11850,
Slotted nut, 316L

DRD 65mm, 316L PE2 X – – X

SMS 2" PN25, 316L UE2 X X X X

Varivent N pipe DN65-162 PN10, 316L WE2 X X X X

Ingold fitting 25x46mm, 316L TT2 – – X –

GQ2
GW2

TC2
TE2

MA2
MC2
ME2

EE2 X X X X

HE2 X X X X

XX – X

XXX X

XXX X

+
CoC

Ra (μm)

<0.3 < 0.38 < 1.5

#

Warning!
To avoid risk of contamination, install according to the "Hygienic Equipment Design Criteria (HDC)" as
stated in the Subgroup Design Principles of the EHEDG, Doc. 8, July 1993.
The flow of liquid during cleaning is important and should be in compliance with the HDC.

!

Note!

• For CIP (Clean in Place) and SIP (Sterilize in Place) processes the pressure and temperature
specifications of the process connections must be observed.

42 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

• Suitable fittings and seals must be used to ensure hygiene-compliant design according to 3A,
EHEDG, ASME BPE etc.

• Surfaces with ASME-BPE option: Ra < 0.38 m (< 15 in) electropolished and passivated or Ra <

1.5 m (59 in) mechanically polished.

Other certificates • Material certificate as per EN 10204/3.1 for all wetted parts NACE MR0175/MR0103, AD2000

• Leak detection system in conjunction with WHG approval
Approval number: Z–65.40–446 (see also "Ordering information" s. Seite 43 ff.)

• TSE Certificate of Suitability
The following applies to wetted device components:
– They do not contain any materials derived from animals.
– No additives or operating materials derived from animals are used in production or processing.

!

Manufacturer declarations The following documents can be ordered together with the document, depending on the desired device

Note!
Wetted device components are listed in the "Mechanical construction“ ( ä 30 ff.) and "Ordering
information“ ( ä 43 ff.) sections.

configuration:

•FDA conformity

• TSE-free: Materials not derived from animals

• Regulation (EC) no. 2023/2006 (GMP)

• Regulation (EC) No. 1935/2004 materials in contact with food

The applicable European guidelines and standards can be found in the relevant EU Declarations of
Conformity.

Regulation (EU) No. 10/2011: The regulation on plastic materials does not apply to the Liquiphant
FTL5x, as the wetted materials are made exclusively of stainless steel.
The silicone seals supplied comply with BFR recommendation XV (commodities based on silicones
from the Federal Institute for Risk Assessment - BFR), and the EPDM seals provided comply with BFR
recommendation XXI (commodities based on natural and synthetic rubber).

Use in hazardous zones Pay particular attention to the information provided in the documentation: Safety Instructions, Control

Drawings etc.  ä 58

ASME B 31.3 Design and materials in accordance with ASME B31.3 The welding seals are through-penetration

welded and comply with ASME Boiler and Pressure Vessel Code Section IX and EN ISO 15614-1.

Pressure equipment directive The Pressure Equipment Directive 97/23/EC does not apply to the Liquiphant FTL5x, as it does not

have a pressurized housing in accordance with Article 1, Paragraph 2.1.4 of the directive.

Ordering information

Detailed ordering information is available from the following sources:

• In the Product Configurator on the Endress+Hauser website: www.endress.com → Click "Corporate"
→ Select your country → Click "Products" → Select the product using the filters and search mask →
Open the product page → The "Configuration" button to the right of the product image opens the
Product Configurator.

• From your Endress+Hauser Sales Center: www.addresses.endress.com

!

!

Note!
Product Configurator - the tool for individual product configuration

• Up-to-the-minute configuration data

• Depending on the device: direct input of information specific to measuring point, such as measuring
range or operating language

• Automatic verification of exclusion criteria

• Automatic creation of the order code and its breakdown in PDF or Excel output format

• Ability to order directly from the Endress+Hauser online shop

Note!
Versions that are mutually exclusive are not indicated in this table.

Endress+Hauser 43

Liquiphant M FTL50(H), FTL51(H)

Product structure for Liquiphant M FTL50, FTL51

Design Basic weight

FTL50 Compact 0.6 kg

FTL51 With extension pipe 0.6 kg

10 Approval:

A Non-hazardous area

B ATEX II 3G Ex nC IIC T6, WHG, ATEX II 3D Ex tc IIIC T85°C, NEPSI II 3G Ex nC IIC T6

C ATEX II 3G Ex nA IIC T6, WHG, ATEX II 3D Ex tc IIIC T85°C, NEPSI II 3G Ex nA IIC T6

D Non-hazardous area, WHG

E ATEX II 1/2G Ex de IIC T6, WHG

F ATEX II 1/2GD Ex ia IIC T6, WHG/IECEx

G ATEX II 1/2GD Ex ia IIC T6/IECEx Zone0/1

H ATEX II 1G Ex ia IIC T6

I ATEX II 1/2G Ex de IIC T6/IECEx Zone0/1

J ATEX II 1G Ex ia IIC T6, WHG

K ATEX II 1/2G Ex d IIC T6/IECEx Zone0/1

L ATEX II 1/2G Ex d IIC T6, WHG

M NEPSI Ex ia IIC T6

N NEPSI Ex d IIC T6

P FM IS Cl.I,II,III Div.1 Gr.A-G, Zone 0,1,2,20,21,22

Q FM XP Cl.I,II,III Div.1 Gr.B-G, Gr.A-G if E5 housing selected, Zone 1,2

R FM NI Cl.I Div.2 Gr.A-D, Zone 0,1,2,20,21,22

S CSA C/US IS Cl I,II,III Div.1 Gr.A-G, Zone 0,1,2

T CSA C/US XP Cl I,II,III Div.1 Gr.A-G, Zone 1,2

U CSA C/US General Purpose

VTIIS Ex ia IIC T3

W TIIS Ex d IIB T3

7 TIIS Ex d IIC T3

8 TIIS Ex d IIC T6

1 INMETRO Ex ia IIC T6 Ga/Gb

2 INMETRO Ex d IIC T6 Ga/Gb

3 INMETRO Ex de IIC T6 Ga/Gb

Y Special version, TSP-No. to be spec.

20 Process connection: Additional

weight

Note!
For 100 bar (1450 psi) process pressure, select the appropriate option under "Additional option"

GQ2 G ¾ 316L Thread ISO 228

Installation > accessories: weld-in adapter

GQ6 G ¾ AlloyC22 Thread ISO 228

GR2 G 1 316L Thread ISO 228 0.2 kg

GR6 G 1 AlloyC22 Thread ISO 228 0.2 kg

GW2* G 1 316L Thread ISO 228 0.2 kg

Installation > accessories: weld-in adapter

GM2* NPT ¾ 316L Thread ASME

GM6 NPT ¾ AlloyC22 Thread ASME

GN2* NPT1 316L Thread ASME 0.2 kg

GN6 NPT1 AlloyC22 Thread ASME 0.2 kg

GE2 R ¾ 316L Thread EN10226

GE6 R ¾ AlloyC22 Thread EN10226

GF2 R 1 316L Thread EN10226 0.2 kg

GF6 R 1 AlloyC22 Thread EN10226 0.2 kg

BA2 DN32 PN6 A 316L Flange EN 1092-1

BB2 DN32 PN25/40 A 316L Flange EN 1092-1

BC2 DN40 PN6 A 316L Flange EN 1092-1

BD2 DN40 PN25/40 A 316L Flange EN 1092-1

BE2 DN50 PN6 A 316L Flange EN 1092-1

BG2 DN50 PN25/40 A 316L Flange EN 1092-1

BH2 DN65 PN6 A 316L Flange EN 1092-1

BJ2 DN50 PN100 A 316L (FTL51) Flange EN 1092-1

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

1.2 kg

2.0 kg

1.4 kg

2.4 kg

1.6 kg

3.2 kg

2.4 kg

44 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

20 Process connection: Additional

weight

BK2 DN65 PN25/40 A 316L Flange EN 1092-1

BM2 DN80 PN10/16 A 316L Flange EN 1092-1

BN2 DN80 PN25/40 A 316L Flange EN 1092-1

BQ2 DN100 PN10/16 A 316L Flange EN 1092-1

BR2 DN100 PN25/40 A 316L Flange EN 1092-1

B12 DN80 PN100 A 316L (FTL51) Flange EN 1092-1

B82 DN25 PN25/40 A 316L Flange EN 1092-1

CA2 DN32 PN6 B1 316L Flange EN 1092-1

CA6 DN32 PN6 B1 AlloyC22 >316L Flange EN 1092-1

CE2 DN50 PN6 B1 316L Flange EN 1092-1

CE6 DN50 PN6 B1 AlloyC22 >316L Flange EN 1092-1

CG2 DN50 PN25/40 B1 316L Flange EN 1092-1

CG6 DN50 PN25/40 B1 AlloyC22 >316L Flange EN 1092-1

CJ2 DN50 PN100 B2 316L (FTL51) Flange EN 1092-1

CN2 DN80 PN25/40 B1 316L Flange EN 1092-1

CN6 DN80 PN25/40 B1 AlloyC22 >316L Flange EN 1092-1

CQ2 DN100 PN10/16 B1 316L Flange EN 1092-1

CQ6 DN100 PN10/16 B1 AlloyC22 >316L Flange EN 1092-1

C12 DN80 PN100 B2 316L (FTL51) Flange EN 1092-1

C82 DN25 PN25/40 B1 316L Flange EN 1092-1

C86 DN25 PN25/40 B1 AlloyC22 >316L Flange EN 1092-1

DG2 DN50 PN40 B1 316L Flange EN 1092-1

DN2 DN80 PN40 B1 316L Flange EN 1092-1

D82 DN25 PN40 B1 316L Flange EN 1092-1

EG2 DN50 PN25/40 E 316L Flange EN 1092-1 2.6 kg

FG2 DN50 PN40 C 316L Flange EN 1092-1

NG2 DN50 PN40 D 316L Flange EN 1092-1

AA2* 1¼" 150 lbs RF 316/316L Flange ASME B16.5 1.2 kg

AB2* 1¼" 300 lbs RF 316/316L (FTL51) Flange ASME B16.5 2.0 kg

AC2* 1½" 150 lbs RF 316/316L Flange ASME B16.5 1.5 kg

AD2* 1½" 300 lbs RF 316/316L (FTL51) Flange ASME B16.5 2.7 kg

AE2* 2" 150 lbs RF 316/316L Flange ASME B16.5 2.4 kg

AE6 2" 150 lbs RF AlloyC22 >316/316L Flange ASME B16.5 2.4 kg

AF2* 2" 300 lbs RF 316/316L Flange ASME B16.5 3.2 kg

AG2* 2" 600 lbs RF 316/316L (FTL51) Flange ASME B16.5 4.2 kg

AJ2* 2½" 300 lbs RF 316/316L (FTL51) Flange ASME B16.5 4.8 kg

AL2* 3" 150 lbs RF 316/316L Flange ASME B16.5 4.9 kg

AM2* 3" 300 lbs RF 316/316L (FTL51) Flange ASME B16.5 6.8 kg

AM6 3" 300 lbs RF AlloyC22 >316/316L Flange ASME B16.5 6.8 kg

AN2* 3" 600 lbs RF 316/316L (FTL51) Flange ASME B16.5

AP2* 4" 150 lbs RF 316/316L Flange ASME B16.5 7.0 kg

AQ2* 4" 300 lbs RF 316/316L (FTL51) Flange ASME B16.5 11.5 kg

AQ6 4" 300 lbs RF AlloyC22 >316/316L Flange ASME B16.5 11.5 kg

AR2* 4" 600 lbs RF 316/316L (FTL51) Flange ASME B16.5 17.3 kg

A82* 1" 150 lbs RF 316/316L Flange ASME B16.5 1.0 kg

KA2 10 K 25 A RF 316L Flange JIS B2220

KC2 10 K 40 A RF 316L Flange JIS B2220

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 C)

(DIN 2527)

(DIN 2527 C)

(DIN 2527)

(DIN 2527 C)

(DIN 2527)

(DIN 2527)

(DIN 2527 C)

(DIN 2527)

(DIN 2527 C)

(DIN 2527)

(DIN 2527)

(DIN 2527 C)

(DIN 2527)

(DIN 2526 D)

(DIN 2526 D)

(DIN 2526 D)

(DIN 2512 F)

(DIN 2512 N)

4.3 kg

4.8 kg

5.9 kg

5.6 kg

7.5 kg

1.4 kg

1.1 kg

1.1 kg

1.5 kg

1.5 kg

2.9 kg

2.9 kg

5.2 kg

5.2 kg

5.3 kg

5.3 kg

1.3 kg

1.3 kg

2.6 kg

2.9 kg

Endress+Hauser 45

Liquiphant M FTL50(H), FTL51(H)

20 Process connection: Additional

weight

KE2 10 K 50 A RF 316L Flange JIS B2220 1.7 kg

KE6 10 K 50 A RF AlloyC22 >316L Flange JIS B2220 1.7 kg

KL2 10 K 80 A RF 316L Flange JIS B2220

KP2 10 K 100 A RF 316L Flange JIS B2220

TC2* DN25-38 (1 to 1½") 316L Tri-Clamp ISO 2852 0.1 kg

TE2* DN40-51 (2") 316L Tri-Clamp ISO 2852 0.1 kg

YY9 Special version

* With CRN approval.

30 Probe length; Type:

FTL50

AA Compact; Ra <3.2 μm/126 μin

IA Compact; Temperature spacer 0.6 kg

QA Compact; Pressure-tight feedthrough 0.7 kg

FTL51

BB ....... mm; 316L** Ra <3.2 μm/126 μin

BE ....... mm; Alloy** Ra <3.2 μm/126 μin

CB ....... inch; 316L** Ra <3.2 μm/126 μin

CE ....... inch; Alloy** Ra <3.2 μm/126 μin 2.3 kg/100 in

DB Length: type II*; 316L Ra <3.2 μm/126 μin 0.1 kg

DE Length: type II*; Alloy Ra <3.2 μm/126 μin 0.1 kg

JB ....... mm; 316L** + Temperature spacer 0.9 kg/m

JE ....... mm; Alloy** + Temperature spacer 0.9 kg/m

KB ....... inch; 316L** + Temperature spacer 2.3 kg/100 in

KE ....... inch; Alloy** + Temperature spacer 2.3 kg/100 in

LB Length: type II*; 316L + Temperature spacer 0.1 kg

LE Length: type II*; Alloy + Temperature spacer 0.1 kg

RB ....... mm; 316L** + Pressure-tight feedthrough 0.9 kg/m

RE ....... mm; Alloy** + Pressure-tight feedthrough 0.9 kg/m

SB ....... inch; 316L** + Pressure-tight feedthrough 2.3 kg/100 in

SE ....... inch; Alloy** + Pressure-tight feedthrough 2.3 kg/100 in

TB Length: type II*; 316L + Pressure-tight feedthrough 0.1 kg

TE Length: type II*; Alloy + Pressure-tight feedthrough 0.1 kg

YY Special version

*) If replacing devices: when vertically mounting a Liquiphant M

FTL51 with length II the switch point is at the same height as for
a Liquiphant II FTL360, FTL365, FDL30, FDL35.
See also Seite 36 "L II" depends on process connection.

**) Order 3001 to 6000 mm (116 to 235 in) via yy

+0.6 kg

+0.6 kg

+0.6 kg

+0.6 kg

+0.6 kg

+0.6 kg

+0.7 kg

+0.7 kg

+0.7 kg

+0.7 kg

+0.7 kg

+0.7 kg

40 Electronics; output:

A FEL50A PROFIBUS PA

D FEL50D Density/concentration without WHG approval (Germany)

1 FEL51* 2-wire, AC 19 to 253 V

2 FEL52* 3-wire PNP, DC 10 to 55 V

4 FEL54 Relay DPDT, AC 19 to 253 V, DC 19 to 55 V

5 FEL55 8/16 mA, DC 11 to 36 V

6 FEL56 NAMUR (L-H signal)

7 FEL57 2-wire PFM

8 FEL58* NAMUR + test keys (H-L signal)

9 Special version

*) Also available in compact housing

50 Housing; cable entry:

C3 Compact 316L IP66/68; Cable 5 m

D3 Compact 316L IP65; Plug Pg11 ISO4400

E1 F27 316L NEMA 4X/6P; Thread NPT ¾

46 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

50 Housing; cable entry:

E3 Compact 316L

Hygiene

N3 Compact 316L

Hygiene

E4 F16 Polyester NEMA4X; Thread NPT ½

E5 F13 Alu

F17 Alu

E6 F15 316L hygiene NEMA4X; Thread NPT ½ 0.1 kg

E7 T13 Alu NEMA4X/6P; Thread NPT ¾ 0.9 kg

Separate connection compartment

F1 F27 316L IP66/68 Thread G1/2

F4 F16 Polyester IP66/67; Thread G ½

F5 F13 Alu

F17 Alu

F6 F15 316L

Hygiene

F7 T13 Alu coated IP66/68; thread G ½ 0.9 kg

Separate connection compartment

G1 F27 316L IP66/68; M20 threaded joint

Ex d > M20 thread

G4 F16 Polyester IP66/67; M20 threaded joint

G5 F13 Alu

F17 Alu

G6 F15 316L

Hygiene

G7 T13 Alu coated

Separate connection compartment Ex d > thread M20

N4 F16 Polyester IP66/67; M12 connector

N5 F13 Alu

F17 Alu

N6 F15 316L hygiene IP66/67; M12 connector

Y9 Special version

60 Additional option

A Basic version

B PWIS-free, PWIS = paint-wetting impairment substances, max 2000 mm (78.7 in)

C EN 10204 - 3.1 material (316L wetted) inspection certificate

D EN10204-3.1 AD2000 material, wetted, apart from cast parts,

inspection certificate

K Special adjustment, density H20

L Special adjustment, density H20, EN10204-3.1, material (wetted),

inspection certificate

N EN 10204 - 3.1 material, NACE MR0175 (316L wetted)

Inspection certificate

P 100 bar (1450 psi) process pressure (FTL51)

R 100 bar (1450 psi) process pressure, EN 10204 - 3.1

material,
NACE MR0175 (316L wetted)
Inspection certificate

S GL/ABS marine approval for FTL51:

Y Special version

580 Test, certificate:

KD Helium leak test, internal procedure, inspection certificate

KE Pressure test, internal procedure, inspection certificate

KG PMI test (XRF), internal procedure, wetted metal parts, EN10204-3.1 inspection

certificate

KP Dye penetration test AD2000-HP5-3(PT), wetted/pressurized metal parts,

inspection certificate

KQ Dye penetration test ISO23277-1 (PT), wetted/pressurized metal parts,

inspection certificate

KR Dye penetration test ASME VIII-1 (PT), wetted/pressurized metal parts,

inspection certificate

KS Welding documentation, wetted/pressurized seams

KV Declaration of Conformity ASME B31.3

K9 Special version, TSP-No. to be spec.

NEMA4X; Plug NPT ½ ISO4400

IP66/68; M12 connector

NEMA4X/6P;
NEMA4X

IP66/68;
IP66/67;

IP66/67; Thread G ½ 0.1 kg

IP66/68;
IP66/67;

IP66/67; M20 threaded joint 0.1 kg

IP66/68;

IP66/68;
IP66/67;

Thread NPT ¾ 0.5 kg

Thread G ½ 0.5 kg

M20 threaded joint 0.5 kg

Ex d > thread M20

M20 threaded joint 0.9 kg

M12 connector

(FTL51)

 1600 mm (63 in)

FTL5x - Complete product designation

!

Note!
The basic weight includes the compact sensor, thread adapter G ¾, electronic insert, polyester housing

Endress+Hauser 47

Liquiphant M FTL50(H), FTL51(H)

Product structure for Liquiphant M FTL50H, FTL51H

Design Basic weight

FTL50H Compact 0.7 kg

FTL51H With extension pipe 0.7 kg

10 Approval:

A Non-hazardous area

B ATEX II 3G Ex nC IIC T6, WHG, ATEX II 3D Ex tc IIIC T85°C, NEPSI II 3G Ex nC IIC T6

C ATEX II 3G Ex nA IIC T6, WHG, ATEX II 3D Ex tc IIIC T85°C, NEPSI II 3G Ex nA IIC T6

D Non-hazardous area, WHG

E ATEX II 1/2G Ex de IIC T6, WHG

F ATEX II 1/2GD Ex ia IIC T6, WHG/IECEx

G ATEX II 1/2GD Ex ia IIC T6/IECEx Zone0/1

H ATEX II 1G Ex ia IIC T6

I ATEX II 1/2G Ex de IIC T6/IECEx Zone0/1

J ATEX II 1G Ex ia IIC T6, WHG

K ATEX II 1/2G Ex d IIC T6/IECEx Zone0/1

L ATEX II 1/2G Ex d IIC T6, WHG

M NEPSI Ex ia IIC T6

N NEPSI Ex d IIC T6

P FM IS Cl.I,II,III Div.1 Gr.A-G, Zone 0,1,2,20,21,22

Q FM XP Cl.I,II,III Div.1 Gr.B-G, Gr.A-G if E5 housing selected, Zone 1,2

R FM NI Cl.I Div.2 Gr.A-D, Zone 0,1,2,20,21,22

S CSA C/US IS Cl I,II,III Div.1 Gr.A-G, Zone 0,1,2

T CSA C/US XP Cl I,II,III Div.1 Gr.A-G, Zone 1,2

U CSA C/US General Purpose

VTIIS Ex ia IIC T3

W TIIS Ex d IIB T3

7 TIIS Ex d IIC T3

8 TIIS Ex d IIC T6

1 INMETRO Ex ia IIC T6 Ga/Gb

2 INMETRO Ex d IIC T6 Ga/Gb

3 INMETRO Ex de IIC T6 Ga/Gb

Y Special version, TSP-No. to be spec.

20 Process connection: Additional

weight

GQ2 G ¾ 316L (FTL50H) Thread ISO 228

Installation > accessories: weld-in adapter

GW2* G 1 316L Thread ISO 228 0.2 kg

Installation > accessories: weld-in adapter

BA2 DN32 PN6 A 316L Flange EN 1092-1

BB2 DN32 PN25/40 A 316L Flange EN 1092-1

BC2 DN40 PN6 A 316L Flange EN 1092-1

BD2 DN40 PN25/40 A 316L Flange EN 1092-1

BE2 DN50 PN6 A 316L Flange EN 1092-1

BG2 DN50 PN25/40 A 316L Flange EN 1092-1

BH2 DN65 PN6 A 316L Flange EN 1092-1

BK2 DN65 PN25/40 A 316L Flange EN 1092-1

BM2 DN80 PN10/16 A 316L Flange EN 1092-1

BN2 DN80 PN25/40 A 316L Flange EN 1092-1

BQ2 DN100 PN10/16 A 316L Flange EN 1092-1

BR2 DN100 PN25/40 A 316L Flange EN 1092-1

B82 DN25 PN25/40 A 316L Flange EN 1092-1

CG2 DN50 PN25/40 B1 316L Flange EN 1092-1

CN2 DN80 PN25/40 B1 316L Flange EN 1092-1

CQ2 DN100 PN10/16 B1 316L Flange EN 1092-1

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 B)

(DIN 2527 C)

(DIN 2527 C)

(DIN 2527 C)

1.2 kg

2.0 kg

1.4 kg

2.4 kg

1.6 kg

3.2 kg

2.4 kg

4.3 kg

4.8 kg

5.9 kg

5.6 kg

7.5 kg

1.4 kg

3.2 kg

5.9 kg

5.6 kg

48 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

20 Process connection: Additional

weight

EE2 1" flush-mounted

(52001047)

Installation > accessories: weld-in adapter

HE2 DN50 Pipe DIN 11850

AA2* 1¼" 150 lbs RF 316/316L Flange ASME B16.5 1.2 kg

AC2* 1½" 150 lbs RF 316/316L Flange ASME B16.5 1.5 kg

AE2* 2" 150 lbs RF 316/316L Flange ASME B16.5 2.4 kg

AF2* 2" 300 lbs RF 316/316L Flange ASME B16.5 3.2 kg

AJ2* 2½" 300 lbs RF 316/316L (FTL51H) Flange ASME B16.5 4.8 kg

AL2* 3" 150 lbs RF 316/316L Flange ASME B16.5 4.9 kg

AM2 3" 300 lbs RF 316/316L (FTL51H) Flange ASME B16.5 6.8 kg

AP2* 4" 150 lbs RF 316/316L Flange ASME B16.5 7.0 kg

AQ2* 4" 300 lbs RF 316/316L (FTL51H) Flange ASME B16.5 11.5 kg

A82* 1" 150 lbs RF 316/316L Flange ASME B16.5 1.0 kg

KA2 10 K 25 RF 316L Flange JIS B2220

KC2 10 K 40 RF 316L Flange JIS B2220

KE2 10 K 50 RF 316L Flange JIS B2220 1.7 kg

KL2 10 K 80 RF 316L Flange JIS B2220

KP2 10 K 100 RF 316L Flange JIS B2220

MA2 DN32 PN25 316L DIN 11851 0.1 kg

MC2 DN40 PN25 316L DIN 11851 0.2 kg

ME2 DN50 PN25 316L DIN 11851 0.3 kg

PE2 DRD 65 mm 316L 0.3 kg

TC2* DN25-38 (1 to 1½") 316L Tri-Clamp ISO 2852 0.1 kg

TF2* DN25-38 (1 to 1½") 316L Tri-Clamp NA-Connector

TE2* DN40-51 (2") 316L Tri-Clamp ISO 2852 0.1 kg

TF2* DN40-51 (2") 316L Tri-Clamp NA-Connector

TT2 Ingold fitting 25x46mm 316L

UE2 SMS 2" PN25 316L 0.2 kg

WE2* DN65-162 PN10 316L Varivent N pipe 0.5 kg

YY9 Special version

slotted nut

* CRN approval

316L 0.3 kg

316L DIN 11864-1 A 0.3 kg

ISO 2852

ISO 2852

0.1 kg

0.1 kg

30 Probe length; Type:

FTL50H

AC Compact; Ra <1.5 μm/59 μin

AD Compact; Ra <0.3 μm/12 μin

IC Compact; Ra <1.5 μm/59 μin + temperature spacer 0.6 kg

ID Compact; Ra <0.3 μm/12 μin / A3 + temperature spacer 0.6 kg

QC Compact; Ra <1.5 μm/59 μin + pressure-tight feedthrough 0.7 kg

QD Compact; Ra <0.3 μm/12 μin / A3 + pressure-tight feedthrough 0.7 kg

FTL51H

BC ....... mm; Ra <1.5 μm/59 μin 0.9 kg/m

BD ....... mm; Ra <0.3 μm/12 μin / A3 0.9 kg/m

BF ........mm; Ra<0.76 μm/30 μin 0.9 kg/m

CC ....... inch; Ra <1.5 μm/59 μin 2.3 kg/100 in

CD ....... inch; Ra <0.3 μm/12 μin / A3 2.3 kg/100 in

DC Length: type II*; Ra <1.5 μm/59 μin 0.1 kg

DD Length: type II*; Ra <0.3 μm/12 μin / A3 0.1 kg

JC ....... mm; Ra <1.5 μm/59 μin

JD ....... mm; Ra <0.3 μm/12 μin

KC ....... inch; Ra <1.5 μm/59 μin

KD ....... inch; Ra <0.3 μm/12 μin

LC Length: type II*; Ra <1.5 μ

LD Length: type II*; Ra <0.3 μm/12 μin

RC ....... mm; Ra <1.5 μm/59 μin

RD ....... mm; Ra <0.3 μm/12 μin

SC ....... inch; Ra <1.5 μm/59 μin

+ Temperature spacer

+ Temperature spacer

+ Temperature spacer

+ Temperature spacer

m/59 μin

+ Temperature spacer

+ Temperature spacer,

+ Pressure-tight feedthrough

+ Pressure-tight feedthrough

+ Pressure-tight feedthrough

0.9 kg/m
+0.6 kg

0.9 kg/m
+0.6 kg

2.3 kg/100 in
+0.6 kg

2.3 kg/100 in
+0.6 kg

0.1 kg

+0.6 kg

0.1 kg

+0.6 kg

0.9 kg/m
+0.7 kg

0.9 kg/m
+0.7 kg

2.3 kg/100 in
+0.7 kg

Endress+Hauser 49

30 Probe length; Type:

SD ....... inch; Ra <0.3 μm/12 μin

TC Length: type II*; Ra <1.5 μm/59 μin

TD Length: type II*; Ra <0.3 μm/12 μin

YY Special version

*) If replacing devices: when vertically mounting a Liquiphant M

FTL51H with length II the switch point is at the same height as for
a Liquiphant II FTL360, FTL365, FDL30, FDL35.
See also Seite 36 "L II" depends on process connection.

+ Pressure-tight feedthrough

+ Pressure-tight feed through,

+ Pressure-tight feed through,

40 Electronics; output:

A FEL50A PROFIBUS PA

D FEL50D Density/concentration without WHG approval (Germany)

1 FEL51* 2-wire, AC 19 to 253 V

2 FEL52* 3-wire PNP, DC 10 to 55 V

4 FEL54 Relay DPDT, AC 19 to 253 V, DC 19 to 55 V

5 FEL55 8/16 mA, DC 11 to 36 V

6 FEL56 NAMUR (L-H signal)

7 FEL57 2-wire PFM

8 FEL58* NAMUR + test keys (H-L signal)

9 Special version

*) Also available in compact housing

50 Housing; cable entry:

C3 Compact 316L IP66/68; Cable 5 m

D3 Compact 316L IP65; Plug Pg11 ISO4400

E3 Compact 316L

Hygiene

N3 Compact 316L

Hygiene

E4 F16 Polyester NEMA4X; Thread NPT ½

E5 F13 Alu

F17 Alu

E6 F15 316L

Hygiene

E7 T13 Alu NEMA4X/6P; Thread NPT ¾ 0.9 kg

Separate connection compartment

F4 F16 Polyester IP66/67; Thread G ½

F5 F13 Alu

F17 Alu

F6 F15 316L hygiene IP66/67; Thread G ½ 0.1 kg

F7 T13 Alu coated IP66/68; thread G ½ 0.9 kg

Separate connection compartment

Ex d > M20 thread

G4 F16 Polyester IP66/67; M20 threaded joint

G5 F13 Alu

F17 Alu

G6 F15 316L

Hygiene

G7 T13 Alu coated

Separate connection compartment Ex d > thread M20

N4 F16 Polyester IP66/67; M12 connector

N5 F13 Alu

F17 Alu

N6 F15 316L hygiene IP66/67; M12 connector

Y9 Special version

60 Additional option

A Basic version

B CoC-ASME BPE, EN10204-3.1 material (316L wetted)

Inspection certificate

C EN 10204 - 3.1 material (316L wetted),

Inspection certificate

D EN10204-3.1 AD2000 material, wetted, apart from cast parts,

inspection certificate

K Special adjustment, density H2O

L Special adjustment, density H2O, EN10204-3.1 (316L wetted) inspection certificate

S GL/ABS marine approval for FTL51H:

Y Special version

Liquiphant M FTL50(H), FTL51(H)

2.3 kg/100 in
+0.7 kg

0.1 kg

+0.7 kg

0.1 kg

+0.7 kg

NEMA4X; Plug NPT ½ ISO4400

IP66/68; M12 connector

NEMA4X/6P;
NEMA4X

NEMA4X; Thread NPT ½ 0.1 kg

IP66/68;
IP66/67;

IP66/68;
IP66/67;

IP66/67; M20 threaded joint 0.1 kg

IP66/68;

IP66/68;
IP66/67;

Thread NPT ¾ 0.5 kg

Thread G ½ 0.5 kg

M20 threaded joint 0.5 kg

Ex d > thread M20

M20 threaded joint 0.9 kg

M12 connector

 1600 mm (63 in)

50 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

FTL5#H - Complete product designation

!

Note!
Basic weight = compact sensor, thread adapter G ¾, electronic insert, stainless steel housing

Accessories

!

Weld-in adapter Overview

Note!

• All dimensions in mm (in)!

• For additional information on weld-in adapters, refer to TI00426F.

• The tolerance of the thread start between the weld-in adapter and sensor is ± 15°.

a0008246 a 0008251 a0008256 a0011924 a0008248 a0008253

G¾, d=29 (1.14)

without flange

Material
roughness μm (μin)

Without inspection certificate
EN10204-3.1 material

With inspection certificate
EN10204-3.1 material

Seal (replacement part: set of 5)

Weld-in dummy – – 71168889 71166879 71166879 71181945

Liquiphant M Feature Version

FTL50

FTL5x GW2 GW2 GW2

FTL50H GQ2

FTL5xH GW2 GW2 GW2

1) This weld-in adapter replaces the weld-in adapter with the order number 917969-1000.

2) This weld-in adapter replaces the weld-in adapter with the order number 215159-0000.

3) A seal is included in the delivery.

020

316L

1.5 (59.1)

71258357 71258355 52001052

52028295

Silicone O-ring

52021717

G¾, d=50 (1.97)

with flange

3)

52018765

Silicone O-ring

316L

0.8 (31.5)

52021717

G¾, d=55 (2.17)

with flange

3)

52011897

Silicone O-ring

316L

0.8 (31.5)

52014473

GQ2

G1, d=53 (2.09)

3)

3)

G1, d=60 (2.36)

without flange

316L

0.8 (31.5)

71258358 52001051

71093129

Silicone O-ring

52014472

), 3)

with flange

0.8 (31.5)

52011896

Silicone O-ring

52014472

316L

1), 3)

), 3)

G1

can be

positioned

316L

0.8 (31.5)

52001221

52011898

Silicone

profile gasket

52014424)

2), 3)

), 3)

Endress+Hauser 51

Liquiphant M FTL50(H), FTL51(H)

ø110 (4.33)

114 (4.49)

140 (5.51)

140 (5.51)

mm (in)

a0008252 a0008254

RD52

Material
roughness μm (μin), process side

Without inspection certificate
EN10204-3.1 material

With inspection certificate
EN10204-3.1 material

Seal (replacement part: set of 5)

Weld-in dummy M40167 –

Device Feature Version

Liquiphant M

FTL5xH 020 EE2 PE2

316L

0.8 (31.5)

52001047

52006909

Silicone

profile gasket

52014424

1), 2)

), 2)

DRD DN50

65 (2.56)

(welding flange)

316L/304

0.8 (31.5)

52002041

916743-0000

520118992)/ –

PTFE

flat seal

52024228

2)

/

1) This weld-in adapter replaces the weld-in adapter with the order number 942329-0001.

2) A seal is included in the delivery.

!

Note!
All the weld-in adapters available are described in document TI00426F.
www.endress.com --> Download -->Advanced--> Documentation code --> TI00426F.

Weather protection cover For F16 housing

A0018225

Material Order No. Weight

PBT, gray 71127760 240 g (8.46 oz)

52 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

102 (4.02)

162 (6.38)

mm (in)

112 (4.41)

14

(0.55)

G1 12

(0.47)

2

(0.08)

92

(3.62)

92

(3.62)

For F13, F17 and F27 housing

A0018226

Material Order No. Weight

PA6, gray 71040497 300 g (10.58 oz)

Lap joint flange

Lap joint flanges

Order number: 918158-0000
With G 1 thread for mounting
a Liquiphant FTL50, FTL51
with process connection GR2

Pressure up to 40 bar (580 psi)

Material: corrosion-resistant steel

1.4301 (AISI 304)

Weight: 0.54 kg (1.19 lbs)

With G 1 thread for mounting
a Liquiphant FTL50, FTL51
with process connection GR2

Material: corrosion-resistant steel

1.4571 (AISI 316Ti)

– Order number: 918143-0000

Flange DN50 PN40, EN 1092-1
Weight: 3.11 kg (6.86 lbs)

– Order number: 918144-0000

Flange ASME 2", 150 psi, RF
Weight: 2.38 kg (5.25 lbs)

L00-FTL5xxxx-06-05-xx-xx-108

L00-FTL5xxxx-03-05-xx-xx-015

Endress+Hauser 53

Liquiphant M FTL50(H), FTL51(H)

22

(0.87)

M6 (3x)

18

(0.71)

G 1 A

(1 NPT)

G 1½A

(1½ NPT)

19

(0.75)

M6 (3x)

p =
0 bar (psi)

e

FTL51

SW/AF 41

SW/AF 55

19

(0.75)

Sliding sleeves for unpressurized operation

Switch point infinitely variable for
Liquiphant MFTL51

Material: corrosion-resistant steel

1.4435 (AISI 316 L)

Weight for G 1, NPT 1: 0.21 kg (0.46 lbs)
Weight for G 1½, NPT 1½: 0.54 kg (1.19 lbs)

L00-FTL5xxxx-06-05-xx-xx-109

Thread Standard Material Order number Approval

G 1 DIN ISO 228/I 1.4435 (AISI 316 L) 52003978

G 1 DIN ISO 228/I 1.4435 (AISI 316 L) 52011888 With inspection

certificate EN 10204 -

3.1 material

NPT1 ASME B 1.20.1 1.4435 (AISI 316 L) 52003979

NPT1 ASME B 1.20.1 1.4435 (AISI 316 L) 52011889 With inspection

certificate EN 10204 -

3.1 material

G 1½ DIN ISO 228/I 1.4435 (AISI 316 L) 52003980

G 1½ DIN ISO 228/I 1.4435 (AISI 316 L) 52011890 With inspection

certificate EN 10204 -

3.1 material

NPT1½ ASME B 1.20.1 1.4435 (AISI 316 L) 52003981

NPT1½ ASME B 1.20.1 1.4435 (AISI 316 L) 52011891 With inspection

certificate EN 10204 -

3.1 material

54 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

G 1 A

(1 NPT)

G 1½A

(1½ NPT)

18

(0.71)

2

(0.08)

~70

(2.76)

ø60 (2.36)

~72

(2.83)

SW/AF 50

SW/AF 50

FTL51

22

(0.87)

2

(0.08)

ø60 (2.36)

High pressure sliding sleeves

For continuous adjustment of the switch point of a
Liquiphant M FTL51.
Also for use in hazardous areas. Additional
information  ä 58ff. (ATEX, NEPSI).

Material: corrosion-resistant steel

1.4435 (AISI 316L) or AlloyC22

Weight for G 1, NPT 1: 1.13 kg (2.49 lbs)
Weight for G 1½, NPT 1½: 1.32 kg (2.91 lbs)

Seal package made of graphite.

For G1, G 1½:
Seal is included in the delivery.

L00-FTL5xxxx-06-05-xx-xx-110

Thread Standard Material Order number Approval

G 1 DIN ISO 228/1 1.4435 (AISI 316 L) 52003663

G 1 DIN ISO 228/1 1.4435 (AISI 316 L) 52011880 With inspection certificate EN

10204 - 3.1 material

G 1 DIN ISO 228/1 AlloyC22 71118691 With inspection certificate EN

10204 - 3.1 material

NPT1 ASME B 1.20.1 1.4435 (AISI 316 L) 52003667

NPT1 ASME B 1.20.1 1.4435 (AISI 316 L) 52011881 With inspection certificate EN

10204 - 3.1 material

NPT1 ASME B 1.20.1 AlloyC22 71118694 With inspection certificate EN

10204 - 3.1 material

G 1½ DIN ISO 228/1 1.4435 (AISI 316 L) 52003665

G 1½ DIN ISO 228/1 1.4435 (AISI 316 L) 52011882 With inspection certificate EN

10204 - 3.1 material

G 1½ DIN ISO 228/1 AlloyC22 71118693 With inspection certificate EN

10204 - 3.1 material

NPT1½ ASME B 1.20.1 1.4435 (AISI 316 L) 52003669

NPT1½ ASME B 1.20.1 1.4435 (AISI 316 L) 52011883 With inspection certificate EN

10204 - 3.1 material

NPT1½ ASME B 1.20.1 AlloyC22 71118695 With inspection certificate EN

10204 - 3.1 material

Endress+Hauser 55

Liquiphant M FTL50(H), FTL51(H)

p

e

bar

(psi)

T

p

°C

(°F)

–50

(–58)

–60

(–76)

150

(300)

230

(440)

280

(540)

0

(32)

–1

(–14.5)

100

(1450)

Liquiphant M

Liquiphant S

80

(1160)

64

(928)

Liquiphant M FTL51*

27.5

(1.08)

> 40

(1.57)

27.5

(1.08)

> 40

(1.57)

L00-FTL5xxxx-05-05-xx-xx-002

* FTL51 with high-pressure sliding sleeve (100 bar (1450 psi)). See "Additional option" Seite 44 ff. option "P" or "R".l

Cover with sight glass

Cover with sight glass

Circular connector

Order number: 943461-0001
for polyester housing F16

Material: PA 12

Weight: 0.04 kg (0.09 lbs)

For stainless steel housing F15

Material: AISI 316L

Weight: 0.16 kg (0.35 lbs)

– Order number: 52027002

With glass sight glass

– Order number: 52028207

With PC sight glass
(Not for CSA, General Purpose)

Order number: 52010285

4x0.34 M12 socket

Cable: PVC (gray) 5 m (16 ft)

Body: PUR (blue)

Thread adapter nut: Cu Sn/Ni

Degree of protection: IP67

Temperature range with fixed cable:
–25 to +70 °C (-13 to +158 °F)

Temperature range with flexible cable:
–5 to +70 °C (23 to +158 °F)

L00-FTL5xxxx-03-05-xx-xx-016

L00-FTL5xxxx-03-05-xx-xx-017

L00-FTL5xxxx-06-05-xx-xx-111

Order number: 52024216

4x0.34 M12 socket

56 Endress+Hauser

Cable: PVC (orange) 5 m (16 ft)

Body: PVC (orange)

Thread adapter nut: 316L

Degree of protection: IP69 (fully locked)

Temperature range: –25 to +70 °C (-13 to +158 °F)

L00-FTL5xxxx-06-05-xx-xx-112

Liquiphant M FTL50(H), FTL51(H)

27.5

(1.08)

> 40

(1.57)

Order number: 52018763

4x0.34 M12 socket with integrated LEDs

Cable: PVC (orange) 5 m (16 ft)

Body: PVC (transparent)

Thread adapter nut: 316L

Degree of protection: IP69IP69 (fully locked)

Temperature range: –25 to +70 °C (-13 to +158 °F)

Documentation

!

Operating Instructions Electronic insert FEL50A for Liquiphant M, PROFIBUS PA

Note!
You can find supplementary documentation on the product pages at www.endress.com

BA00141F

Liquiphant M Density, density computer FML621
BA00335F

Liquiphant M FTL50, FTL51
KA00143F

Liquiphant M FTL50(H), FTL51(H)
KA00144F

Liquiphant M FTL51C
KA00162F

Liquiphant M FTL50-####### # 7 #, FTL51-####### # 7 #
KA00163F

Liquiphant M FTL50H-######## 7 #, FTL51H-######## 7 #
KA00164F

Liquiphant M FTL51C-######## 7 ##
KA00165F

Liquiphant M FTL5#-# ### ## # #3 #, FTL5#H-# ### ## # #3 #
KA00220F

Electronic insert FEL50D for Liquiphant M Density FTL50, FTL51
KA00284F

Electronic insert FEL50D for Liquiphant M Density FTL50H, FTL51H
KA00285F

Electronic insert: FEL50D for Liquiphant M Density FTL51C
KA00286F

Liquiphant M sliding sleeve for FTL51, G 1, NPT 1
KA00151F

Liquiphant M sliding sleeve for FTL51, G 1½, NPT 1½
KA00152F

Liquiphant M high-pressure sliding sleeve for FTL51, G 1, NPT 1
KA00153F

Liquiphant M high-pressure sliding sleeve for FTL51, G 1½, NPT 1½
KA00154F

L00-FTL5xxxx-06-05-xx-xx-113

Endress+Hauser 57

Technical Information General instructions for electromagnetic compatibility

(Test procedure, installation recommendation)
TI00241F

Liquiphant M FTL51C, wetted parts with highly corrosion-resistant coating
ECTFE, PFA or enamel coating
TI00347F

Isolating amplifier FTL325P, 1- or 3-channel switching units for top-hat rail mounting
for Liquiphant M with electronic insert FEL57
TI00350F

Isolating amplifier FTL325N, 1- or 3-channel switching units for top-hat rail mounting
for Liquiphant M with electronic insert FEL56, FEL58
TI00353F

Liquiphant S FTL70/71, for medium temperatures up to 280 °C (536 °F)
TI00354F

Isolating amplifier FTL375P,
1 to 3-channel switching units for top-hat rail mounting
for Liquiphant M with electronic insert FEL57
TI00360F

Liquiphant M Density, density computer FML621
TI00420F

Weld-in adapter,
TI00426F

Liquiphant M FTL50(H), FTL51(H)

Functional safety (SIL) Liquiphant M with electronic insert FEL51 (MAX)

SD00164F

Liquiphant M with electronic insert FEL51 (MIN)
SD00185F

Liquiphant M with electronic insert FEL52 (MAX)
SD00163F

Liquiphant M with electronic insert FEL52 (MIN)
SD00186F

Liquiphant M with electronic insert FEL54 (MAX)
SD00162F

Liquiphant M with electronic insert FEL54 (MIN)
SD00187F

Liquiphant M with electronic insert FEL55 (MAX)
SD00167F

Liquiphant M with electronic insert FEL55 (MIN)
SD00279F

Liquiphant M with electronic insert FEL57 + Nivotester FTL325P
SD01508F (MAX + MIN)

Liquiphant M with electronic insert FEL56 + Nivotester FTL325N
SD01521F (MAX + MIN)

Liquiphant M with electronic insert FEL58 + Nivotester FTL325N
SD01522F (MAX + MIN)

Safety Instructions ATEX

DEKRA 15 ATEX 0088

• Ex d, Ex de
XA00115F, XA00114F, XA00108F, XA00031F

KEMA 99 ATEX 0523 X

• Ex d, Ex de
XA00113F, XA00064F, XA00063F

58 Endress+Hauser

Liquiphant M FTL50(H), FTL51(H)

EG 01 007 X

•Ex nA
XA00182F

IEC Ex

IECEx DEK 15.0060

• Ex d, Ex de
XA01371F, XA00114F, XA00108F, XA00031F

KEMA 99 ATEX 0523 X; IECEx DEK 15.0028X

• Ex d, Ex de
XA00113F, XA00064F, XA00063F

Safety Instructions (NEPSI) Ex d IIC/IIB T3-T6 , Ex d IIC T2-T6

(NEPSI GYJ06424)
XA00401F/00/B2

Ex ia IIC T2-T6, Ex ia IIB T3-T6
(NEPSI GYJ05556, NEPSI GYJ06464),
XC00009F/00/b2

Ex nA II T3-T6, Ex nC/nL IIC T3-T6
(NEPSI GYJ04360, NEPSI GYJ071414)
XC00010F/00/b2

Control Drawings Liquiphant M (IS and NI) Current output PFM, NAMUR Entity installation

Class I, Div. 1, 2, Groups A, B, C, D
Class I, Zone 0
Class II, Div. 1, 2, Groups E, F, G
Class III
ZD00041F

Liquiphant M, Liquiphant S (cCSAus / IS)
Class I, Div. 1, Groups A, B, C, D Ex ia IIC T6
Class II, Div. 1, Groups E, F, G
Class III
ZD00042F

Liquiphant M (NI), FTL50(H), FTL51(H), FTL51C, FTL70, FTL71
Class I, Div. 2, Groups A, B, C, D
Class II, Div. 2, Groups F, G
Class III
ZD00043F

Liquiphant M, Liquiphant S (cCSAus / XP)
Class I, Groups A, B, C, D
Class II, Groups E, F, G
Class III
ZD00240F

Liquiphant M (IS and NI) PROFIBUS PA, FOUNDATION FieldbusClass I, Zone 0, IIC
Class I, Division 1, 2, Groups A, B, C, D
Class II, Division 1, 2, Groups E, F, G
Class III
ZD00244F

System information Liquiphant M

SI00040F

Endress+Hauser 59

www.addresses.endress.com

713793 807 1379381