Endress+Hauser FTL33 Specifications

TI01148F/00/EN/03.16
71325893

Products Solutions Services

Technical Information

Liquiphant FTL33

Vibronic

Point level switch for liquids
in the food sector

Application

The Liquiphant FTL33 is a point level switch for universal use in all liquids. It is used
preferably in storage tanks, mixing vessels and pipes, where the internal and
external hygiene requirements are particularly stringent.

Ideal for applications in which float switches or conductive, capacitance and optical
sensors have been used up to now. The Liquiphant FTL33 also works in areas where
these measuring principles are not suitable due to conductivity, buildup, turbulence,
flow conditions or air bubbles.

The Liquiphant FTL33 can be used for process temperatures up to:

• 100 °C (212 °F), CIP-capable

• 150 °C (302 °F), CIP- and SIP-capable

Your benefits

• 3-A and EHEDG certificates

• CIP and SIP cleanability guaranteed up to 150 °C (302 °F)
continuous temperature

• All-metal separation, no plastics in the process

• Robust stainless steel housing, optionally available with M12x1 connector with
IP69 protection (optional)

• External function test with test magnet

• Onsite function check possible thanks to LED indication

• Compact design for easy installation even in confined conditions or hard-to-access
areas

Table of contents

Liquiphant FTL33

Document information ....................... 3

Document conventions .......................... 3

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

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

Measuring system ............................. 4

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

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

Measuring range .............................. 5

Output ................................... 5

Switch output ................................ 5

Operating modes .............................. 5

Power supply .............................. 5

Supply voltage ............................... 5

Power consumption ............................ 5

Current consumption ........................... 5

Residual ripple ............................... 5

Electrical connection ........................... 5

Cable entry ................................. 9

Cable specification ............................ 10

Overvoltage protection ......................... 10

Performance characteristics .................. 11

Reference operating conditions ................... 11

Switch point ................................ 11

Hysteresis ................................. 11

Non-repeatability ............................ 11

Influence of ambient temperature ................. 11

Influence of medium temperature .................. 11

Influence of medium pressure .................... 11

Switching delay .............................. 11

Switch-on delay ............................. 11

Measuring frequency .......................... 11

Measured error .............................. 11

Installation ............................... 12

Orientation ................................ 12

Installation instructions ........................ 12

Length of connecting cable ...................... 14

Environment .............................. 15

Ambient temperature range ..................... 15

Storage temperature .......................... 15

Climate class ............................... 15

Altitude ................................... 15

Degree of protection .......................... 16

Shock resistance ............................. 16

Vibration resistance ........................... 16

Cleaning .................................. 16

Electromagnetic compatibility .................... 16

Reverse polarity protection ...................... 16

Short-circuit protection ........................ 16

Process .................................. 17

Process temperature range ...................... 17

Process pressure range ......................... 17

Density ................................... 17

State of aggregation ........................... 17

Viscosity .................................. 17

Solids contents .............................. 17

Lateral loading capacity ........................ 17

Mechanical construction .................... 18

Design .................................... 18

Connector ................................. 19

Tuning fork ................................ 19

Sensor type ................................ 20

Weight ................................... 24

Materials .................................. 24

Surface roughness ............................ 25

Operability ............................... 26

LED display ................................ 26

Function test with test magnet .................... 26

Certificates and approvals ................... 27

CE mark ................................... 27

EAC conformity .............................. 27

RCM-Tick marking ............................ 27

Approval .................................. 27

Hygienic compatibility ......................... 27

Hygiene approval ............................ 28

Overfill prevention ............................ 28

CRN approval ............................... 28

Inspection certificates .......................... 28

Manufacturer declarations ...................... 28

Pressure Equipment Directive .................... 28

Other standards and guidelines ................... 28

Ordering information ...................... 29

Ordering information .......................... 29

Services (optional) ............................ 29

Accessories ............................... 29

Process adapter M24 .......................... 29

Weld-in adapter ............................. 30

Slotted nut ................................. 30

Plug-in jack, cable ............................ 31

Additional accessories ......................... 32

Supplementary documentation ............... 33

Operating Instructions ......................... 33

Additional documentation ...................... 33

Certificates ................................. 33

2 Endress+Hauser

Liquiphant FTL33

DANGER

WARNING

CAUTION

NOTICE

Document information

Document conventions Safety symbols

Symbol Meaning

Electrical symbols

A0011189-EN

A0011190-EN

A0011191-EN

A0011192-EN

DANGER!

This symbol alerts you to a dangerous situation. Failure to avoid this situation
will result in serious or fatal injury.

WARNING!

This symbol alerts you to a dangerous situation. Failure to avoid this situation
can result in serious or fatal injury.

CAUTION!

This symbol alerts you to a dangerous situation. Failure to avoid this situation
can result in minor or medium injury.

NOTE!

This symbol contains information on procedures and other facts which do not
result in personal injury.

Symbol Meaning

Ground connection

A grounded terminal which, as far as the operator is concerned, is grounded via a grounding

A0011200

system.

Protective ground connection

A terminal which must be connected to ground prior to establishing any other connections.

A0011199

Symbols for certain types of information

Symbol Meaning

Permitted

Indicates procedures, processes or actions that are permitted.

A0011182

Forbidden

Indicates procedures, processes or actions that are forbidden.

A0011184

Tip

Indicates additional information.

A0011193

Reference to documentation

Refers to the corresponding device documentation.

A0011194

Reference to page

Refers to the corresponding page number.

A0011195

Symbols in graphics

Symbol Meaning

1, 2, 3 ... Item numbers

A, B, C, ... Views

Endress+Hauser 3

Function and system design

2

1

3

Liquiphant FTL33

Measuring principle

Measuring system

A piezoelectric drive causes the tuning fork of the Liquiphant FTL33 to vibrate at its resonance
frequency. When the tuning fork is immersed in a liquid, its intrinsic frequency changes due to the
change in density of the surrounding medium. The electronics system in the point level switch
monitors the resonance frequency and indicates whether the tuning fork is vibrating in air or is
covered by liquid.

A signal is output via the DC-PNP or AC/DC electrical connection.

The measuring system consists of a Liquiphant FTL33 point level switch, e.g. for connection to
programmable logic controllers (PLC), a mini-contactor or solenoid valve.

1 Overfill prevention or upper level detection MAX (maximum safety)
2 Lower level detection MIN (minimum safety)
3 Lower level detection MIN, e.g. dry running protection for pump

A0020911

4 Endress+Hauser

Liquiphant FTL33

Input

Measured variable

Measuring range

Switch output

Operating modes

Density

> 0.7 g/cm³ (optionally available: > 0.5 g/cm³)

Output

Switching behavior: On/Off

Function

3-wire DC-PNP:
Positive voltage signal at the switch output of the electronics (PNP), switching capacity 200 mA
2-wire AC/DC:
Load switching in the power supply line, switching capacity 250 mA

The device has two operating modes: maximum safety (MAX) and minimum safety (MIN).

By choosing the corresponding operating mode, the user ensures that the device also switches in a
safety-oriented manner even in an alarm condition, e.g. if the power supply line is disconnected.

• Maximum safety (MAX)
The device keeps the electronic switch closed as long as the liquid level is below the fork. Sample
application: overfill prevention

• Minimum safety (MIN)
The device keeps the electronic switch closed as long as the fork is immersed in liquid. Sample
application: Dry running protection for pumps

The electronic switch opens if the limit is reached, if a fault occurs or the power fails (quiescent
current principle).

Supply voltage

Power consumption

Current consumption

Residual ripple

Electrical connection

Power supply

DC-PNP:
AC/DC:

DC-PNP:
AC/DC:

DC-PNP:
AC/DC:

DC-PNP:
AC/DC:

Two electronic versions and three different connections are available for the device.

• Electronic version 3-wire DC-PNP with connection; M12 plug, valve plug or cable

• Electronic version 2-wire AC/DC with connection; valve plug or cable

A fine-wire fuse is necessary for operation: 500 mA slow-blow.

Electronic version 3-wire DC-PNP

3-wire DC-PNP is preferably used in conjunction with programmable logic controllers (PLC), DI
modules as per EN 61131-2. Positive signal at the switch output of the electronics (PNP).

Voltage source: non-hazardous contact voltage or Class 2 circuit (North America).

10 to 30 V DC, 3-wire
20 to 253 V AC/DC, 2-wire

< 975 mW
< 850 mW

< 15 mA
< 3.8 mA

5 Vss 0 to 400 Hz
—

Endress+Hauser 5

Liquiphant FTL33

0.5A

L– L+

2

1

3

4

K

0.5A

L–

L+

2

1

3

4

K

1

21

2

1

41

4

0.5A

L– L+

2

1

3

4

K1

K2

1

2

1

4

4

1

1 2

21

41

Connection with M12 plug

Depending on the analysis of the switch outputs, the device works in the MAX (maximum safety) or
MIN (minimum safety) mode.

A cable is optionally available for order, see "Accessories" section →  31.

3-wire DC-PNP Operating mode

M12 connector MAX MIN

A0022901

SymbolsKDescription

Yellow LED (ye) lit
Yellow LED (ye) not lit
external load

Function monitoring with M12 connector

Using a two-channel analysis, function monitoring of the sensor can be implemented in addition to
level monitoring, e.g. per relay switch, PLC, AS-i Bus I/O module, …).

When both outputs are connected, the MIN and MAX outputs assume opposite states when the
device is operating fault-free (XOR). In the event of an alarm condition or a line break, both outputs
are deenergized.

Connection with 3-wire DC-PNP for function monitoring based on XOR logic

Sensor covered

Sensor exposed

Fault

A0022917

Symbols

K1 / K2

Description

LED lit
LED not lit
Fault or warning
external load

Yellow LED

(ye)

Red LED

(rd)

6 Endress+Hauser

Liquiphant FTL33

1

3

0.5A

L–

L+

2

K

+

–

L–

L+

3

0.5A

1

2

K

+

–

3

23

2

2323

0.5A

1

2

3

L–

L+

K

+

L+

0.5A

K

1

2

3

L–

+

3

23

2

2323

Connection with valve plug or cable

Depending on the assignment of the connector or the wiring of the cable, the device works in either
the MAX or MIN operating mode.

3-wire DC-PNP Operating mode

Valve plug MAX MIN

A0022900

Cable (cannot be
dismantled)

Core colors:
1 = BK (black)
2 = GR (gray)
3 = BN (brown)
Ground = GNYE (green­yellow)

SymbolsKDescription

Yellow LED (ye) lit
Yellow LED (ye) not lit
external load

A0022902

Endress+Hauser 7

Liquiphant FTL33

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

P2

Electronic version 2-wire AC/DC

The load is switched via an electronic switch directly in the power supply circuit. Always connect in
series with a load!

Not suitable for connection to low-voltage PLC inputs!

Selection tool for relays

 1 Minimum rated power of the load

P/S Rated power in [W] / [VA]
U Operating voltage in [V]

Item Supply voltage

P1
AC mode

P2
DC mode

24 V
110 V
230 V

24 V

48 V

60 V

min max

> 1.3 VA
> 1.5 VA
> 2.5 VA

> 0.7 W
> 0.9 W
> 1.5 W

Rated power

< 6 VA
< 27.5 VA
< 57.5 VA

< 6 W
< 12 W
< 15 W

Relays with a lower rated power can be operated by means of an RC module connected in parallel
(optional).

A0023486

8 Endress+Hauser

Liquiphant FTL33

3

0.5A

1

K

>20 V

L1/L+ N/L–

2

0.5A

1

K

>20 V

L1/L+ N/L–

1313

1

21

2

3

L1/L+

0.5A

K

>20 V

1

2

N/L–

1

L1/L+

0.5A

K

2

3

N/L–

>20 V

1313

1

21

2

A

B

C

Connection with valve plug or cable

Depending on the assignment of the connector or the wiring of the cable, the device works in either
the MAX or MIN operating mode.

When the cable is wired, one wire of the cable does not have any function in each of the operating
modes (brown in the case of MIN, and gray in the case of MAX). The cable with no function must be
secured against inadvertent contact.

2-wire AC/DC Operating mode

Valve plug MAX MIN

Cable entry

Cable (cannot be dismantled)

Core colors:
1 = BK (black)
2 = GR (gray)
3 = BN (brown)
Ground = GNYE (green-yellow)

SymbolsKDescription

Yellow LED (ye) lit
Yellow LED (ye) not lit
external load

A0022900

A0022902

A0021219

A0021418

A0022161

A0021418

A0021220

A0021420

A0022225

A0021420

Endress+Hauser 9

A0020928

A Valve plug (M16x1.5; NPT ½"; QUICKON)
B M12 connector
C Cable 5 m (16 ft); secured in place on delivery and cannot be disassembled

Liquiphant FTL33

Cable specification

Overvoltage protection

• Valve plug
– Cable cross-section: max. 1.5 mm2 (AWG 16)
– Ø 3.5 to 8 mm (0.14 to 0.26 in)

• M12 connector: IEC 60947-5-2

• Cable (3LPE)
– Cable cross-section: 0.75 mm2 (AWG 20)
– Ø 6 to 8 mm (0.24 to 0.31 in)
– Material: PUR

Overvoltage category II

10 Endress+Hauser

Liquiphant FTL33

Performance characteristics

Reference operating conditions

Switch point

Hysteresis

Non-repeatability

Influence of ambient temperature

Influence of medium temperature

Influence of medium pressure

Ambient temperature: +25 °C (+77 °F)

Process pressure: 1 bar (14.5 psi)

Fluid: Water (density: approx. 1 g/cm³, viscosity 1 mm2/s)

Medium temperature: 25 °C (77 °F)

Density setting: > 0.7 g/cm³

Switching time delay: Standard (0.5 s, 1 s)

13 mm (0.51 in)±1 mm

max. 3 mm (0.12 in)

±1 mm (0.04 in) in accordance with DIN 61298-2

Negligible

–25 µm (984 µin)/°C

–20 µm (787 µin)/bar

Switching delay

Switch-on delay

Measuring frequency

Measured error

• 0.5 s when tuning fork is covered

• 1.0 s when tuning fork is uncovered

• Optionally available: 0.2 s; 1.5 s or 5 s (when the tuning fork is covered and uncovered)

max. 3 s

approx. 1 100 Hz in air

In event of device change: ±2 mm (0.08 in) as per DIN 61298-2

Endress+Hauser 11

Installation

1

2

2

3

A

~30 (1.2)

A

A

~10.5(0.4)

~13 (0.5)

Liquiphant FTL33

Orientation

The point level switch can be installed in any position in a vessel, pipe or tank. Foam formation does
not affect the function.

 2 Installation options

1 Overfill prevention or upper level detection
2 Lower level detection
3 Dry running protection for pump

Installation instructions Switch point

The switch point (A) on the sensor depends on the orientation of the point level switch (water
+25 °C (+77 °F), 1 bar (14.5 psi).

 3 Vertical and horizontal orientation, dimensions in mm (in)

A0023118

A0020734

12 Endress+Hauser

Liquiphant FTL33

A

B

116.8 (4.6)
13 (0.51)

25 (0.98)

128 (5.04)

C

C

ø >50 (2.0)

<5 m/s (16 ft/s)

ø >10 (0.4)

Short tube version

The use of the short tube ensures that the switch point is at the same level as in the previous
Liquiphant FTL260 and FTL330 models when an identical thread is selected. In this way, the device
can be replaced quickly and easily. (Applies for process connections G 1" weld-in adapter for flush­mounted installation and MNPT 1")

A0022122

Dimensions mm (in)
A Liquiphant FTL33 with short tube
B Liquiphant FTL260 or FTL330
C Switch point

Installation in pipes

During installation, pay attention to the position of the fork in order to minimize turbulence in the
pipe.

A0021357

Dimensions mm (in)

Endress+Hauser 13

A0022268

Liquiphant FTL33

G1/2

316L

Installation in vessels

If installed horizontally, pay attention to the position of the tuning fork to ensure that the liquid can
drip off easily.

The electrical connection, e.g. M12 connector, should be pointing down with the cable. This can
prevent moisture from penetrating.

Length of connecting cable

A0021034

 4 Position of the fork in the case of horizontal installation in a vessel

Distance from wall

Ensure that there is sufficient distance between the expected buildup on the tank wall and the fork.
Recommended distance from wall ≥10 mm (0.39 in).

A0022272

• to1 000 m (3 281 ft)

• max. 25 Ω/wire, total capacitance < 100 nF

14 Endress+Hauser

Liquiphant FTL33

0 +50

+80

+100

–40

+32 +122

+176

+212

–40

–40

+70

[°C]

+158

[°F]

0

+32

[°C]

[°F]

+50

+122

T

a

T

P

T

a

T

p

1

2

–40

0 +50 +100 +150

–40

+32 +122 +212 +302

–40

–40

+70

[°C]

–40

+158

[°F]

0

+32

[°C]

[°F]

+50

+122

T

a

T

P

1

2

T

a

T

p

+90

+194

Environment

Ambient temperature range

–40 to +70 °C (–40 to +158 °F)

 5 Derating curve: 100 °C (212 °F)

1 I
2 I
Ta Ambient temperature range

Tp Process temperature

: 200 mA (DC-PNP), 250 mA (AC/DC)

max

: 150 mA (DC-PNP), 150 mA (AC/DC)

max

A0022002

A0020869

 6 Derating curve: 150 °C (302 °F)

1 I

Storage temperature

Climate class

Altitude

2 I
Ta Ambient temperature range

Tp Process temperature

–40 to +85 °C (–40 to +185 °F)

DIN EN 60068-2-38/IEC 68-2-38: test Z/AD

Up to 2 000 m (6 600 ft) above sea level

Endress+Hauser 15

: 200 mA (DC-PNP), 250 mA (AC/DC)

max

: 150 mA (DC-PNP), 150 mA (AC/DC)

max

Liquiphant FTL33

Degree of protection

Shock resistance

Vibration resistance

Cleaning

Electromagnetic compatibility

Reverse polarity protection

• IP65/67 NEMA Type 4X Enclosure (M12 connector)

• IP66/68/69

• IP65 NEMA Type 4X Enclosure (valve plug)

• IP66/68 NEMA Type 4X/6P Enclosure (cable)

1) The IP69K protection class is defined in accordance with DIN 40050 Part 9. This standard was withdrawn
on 01.11.2012 and replaced by DIN EN 60529. The name of the IP protection class changed to IP69 as
part of this.

1)

NEMA Type 4X/6P Enclosure (M12 plug for metallic housing cover)

a = 300 m/s² = 30 g, 3 planes x 2 directions x 3 shocks x 18 ms,
as per test Ea, prEN 60068-2-27:2007

a(RMS) = 50 m/s², ASD = 1.25 (m/s²)²/Hz, f = 5 to 2000 Hz, t = 3 x 2 h,
as per test Fh, EN 60068-2-64:2008

Resistant to typical cleaning agents from the outside. Passed Ecolab test.

Electromagnetic compatibility in accordance with all relevant requirements of the EN 61326 series
and NAMUR recommendation EMC (NE21). For details, refer to the EC Declaration of Conformity.
The EC Declaration of Conformity is available in the Download Area of the Endress+Hauser website:

www.endress.com → Downloads.

2-wire AC/DC

• AC mode: the device has reverse polarity protection.

• DC mode: in the event of reverse polarity the maximum safety mode is always detected. Check the

wiring and perform a function check before commissioning. The device is not damaged in the
event of reverse polarity.

3-wire DC-PNP

Integrated. In the event of reverse polarity, the device is deactivated automatically.

Short-circuit protection

2-wire AC/DC

During switching the sensor checks whether a load, e.g. relay or contactor, is present (load check). If
an error occurs, the sensor is not damaged.
Smart monitoring: normal operation is resumed once the error is fixed.

3-wire DC-PNP

Overload protection/short-circuit protection at I > 250 mA; the sensor is not destroyed.
Intelligent monitoring: Testing for overload at intervals of approx. 1.5 s; normal operation resumes
once the overload/short-circuit has been rectified.

16 Endress+Hauser

Liquiphant FTL33

Process

Pay attention to the pressure and temperature derating depending on the selected process
connection →  20.

Process temperature range

Process pressure range

Density

State of aggregation

Viscosity

Solids contents

Lateral loading capacity

–40 to +100 °C (–40 to +212 °F)

–40 to +150 °C (–40 to +302 °F)

Max. –1 to +40 bar (–14.5 to +580 psi)

> 0.7 g/cm³ (optionally available: > 0.5 g/cm³)

Liquid

1 to 10 000 mPa·s, dynamic viscosity

ø < 5 mm (0.2 in)

Lateral loading capacity of the tuning fork: maximum 200 N

Endress+Hauser 17

Mechanical construction

A

B

C

D

Liquiphant FTL33

Design

Various versions of the point level switch are available, the features of which can be selected to suit
your user needs.

The versions can be selected via the product structure in the Product Configurator, see the "Ordering
information" section →  29. Examples can be seen in the following diagram:

A0022077

Versions

Electrical connection Valve plug

Housing (sensor design)
for process
temperatures up to:

Sensor type Compact version Short tube version Compact version Short tube version

A B C D

Cable

(cannot be

dismantled)

100 °C (212 °F) 100 °C (212 °F) 150 °C (302 °F) 150 °C (302 °F)

Examples

M12 connector

for housing cover

IP66/68/69

M12 connector

for housing cover

IP65/67

Detailed information on the process connections is provided in the "Sensor type" section
→  20.

Information on the short tube version is provided in the "Installation instructions" section
→  13.

18 Endress+Hauser

Liquiphant FTL33

40 (1.6)

51.5 (2.0)

45 (1.8)

45.5 (1.8)

27.5 (1.1)

25 (1.0)

39 (1.5)

27.5 (1.1)

25 (1.0)

39 (1.5)

27.8 (1.1)

45.3 (1.8)

8 (0.31)

13.7 (0.54)

38 (1.5)

14 (0.55)

3 (0.12)

ø17.1 (0.67)

Connector

Dimensions

Dimensions mm (in)

The following graphics illustrate the connectors together with the suitable housing covers on the
housing of the point level switch.

Electrical connection with housing cover Designation

A

A

A0021859

A0021858

B

B

A:

Valve plug M16, NPT ½"
for housing cover: PPSU plastic

B:

Valve plug QUICKON
for housing cover: PPSU plastic

A0021860

A:

M12 connector
for housing cover: 316L (1.4404),
IP66/68/69

B:

M12 connector
for housing cover: PPSU plastic
(IP65/67)

A0021857

Captive cable
with housing cover: PPSU plastic

Tuning fork

A0021692

Dimensions

Dimensions mm (in)

A0022250

Endress+Hauser 19

Liquiphant FTL33

16 (0.63)

63.9 (2.52)

112 (4.41)*

136.6 (5.38)**

38 (1.5)

ø31.5

(1.24)

32

16 (0.63)

103.3 (4.07)

151.4 (5.96)*

176 (6.93)**

ø17.1

(0.7)

ø31.5

(1.24)

38 (1.5)

32

Sensor type

Dimensions

Dimensions mm (in)

The total dimensions of the device can vary depending on the connector selected. To determine the
total dimensions, please refer also to the "Electrical connection" section →  19.

Information on the following tables

• Meaning of symbols:

*  Dimension for process temperature max. 100 °C (212 °F)
** Dimension for process temperature max. 150 °C (302 °F)

• If several versions have the same dimensions, one example of the compact version and one

example of the short tube version is given.

• The versions in the second column refer to the process connections in the product structure.

Information on 3-A and EHEDG-approved weld-in adapters can be found in the "Weld-in
adapters, process adapters and flanges" documentation, TI00426F/00.→  33.

Dimensions Version Description

WBJ Thread ISO 228 G ½"

• Material: 316L

• Scope of delivery: flat seal (FA)

• Pressure and temperature (maximum):
+40 bar (+580 psi) at +150 °C (+302 °F)

W5J Thread ISO 228 G ¾"

for flush-mounted installation in weld-in adapter

• Material: 316L

• Scope of delivery: flat seal (FA)

Accessory: weld-in adapter

A0021787

 7 Compact version, example G ½"

– Scope of delivery: seal (VMQ)
– Pressure and temperature (maximum):

+25 bar (+362 psi) at +150 °C (+302 °F)
+40 bar (+580 psi) at +100 °C (+212 °F)

– Approval:

EHEDG (Ra 1.5 µm (59 µin), 0.76 µm (30 µin))
3-A (Ra 0.76 µm (30 µin))

A0021883

 8 Short tube version, example G ½"

20 Endress+Hauser

Liquiphant FTL33

47.9 (1.89)

77.4 (3.05)

136.6 (5.38)*

151.4 (5.96)**

38 (1.5)

ø31.5

(1.24)

32

87.3 (3.44)

116.8 (4.6)

176 (6.93)*

190.8 (7.51)**

ø17.1

(0.7)

38 (1.5)

ø31.5

(1.24)

32

63.9 (2.52)

112 (4.41)*

136.6 (5.38)**

38 (1.5)

ø31.5

(1.24)

32

47.9 (1.89)

103.3 (4.07)

151.4 (5.96)*

176 (6.93)**

38 (1.5)

ø17.1

(0.7)

ø31.5

(1.24)

32

87.3 (3.44)

Dimensions Version Description

WSJ Thread ISO 228 G 1"

for flush-mounted installation in weld-in adapter

• Material: 316L

• Scope of delivery: flat seal (FA)

Accessory: weld-in adapter
– Scope of delivery: seal (VMQ)
– Pressure and temperature (maximum):

+25 bar (+362 psi) at +150 °C (+302 °F)
+40 bar (+580 psi) at +100 °C (+212 °F)

– Approval:

EHEDG (Ra 1.5 µm (59 µin), 0.76 µm (30 µin))
3-A (Ra 0.76 µm (30 µin))

A0022008

 9 Compact version

A0022007

 10 Short tube version

Dimensions Version Description

VAJ Thread ASME MNPT ½"

VBJ Thread ASME MNPT ¾"

• Material: 316L

• Pressure and temperature (maximum):
+40 bar (+580 psi) at +150 °C (+302 °F)

The dimensions apply for MNPT ½" and MNPT ¾".

A0021788

 11 Compact version, example MNPT ¾"

 12 Short tube version, example MNPT ¾"

Endress+Hauser 21

A0021895

Dimensions Version Description

66.4 (2.61)

47.9 (1.89)

112 (5.38)*

136.6 (5.38)**

38 (1.5)

ø31.5

(1.24)

32

98.3 (3.87)

116.8 (4.57)

176 (6.93)*

190.8 (7.51)**

ø17.1

(0.7)

38 (1.5)

ø31.5

(1.24)

32

64.9 (2.56)

112 (4.41)*

136.6 (5.38)**

38 (1.5)

ø31.5

(1.24)

32

104.3 (4.12)

151.4 (5.96)*

176 (6.93)**

ø17.1

(0.7)

ø31.5

(1.24)

38 (1.5)

32

VCJ Thread ASME MNPT 1"

• Material: 316L

• Pressure and temperature (maximum):
+40 bar (+580 psi) at +150 °C (+302 °F)

A0022330

 13 Compact version

Liquiphant FTL33

A0022331

 14 Short tube version

Dimensions Version Description

X2J Thread M24x1.5

for flush-mounted installation in adapter

• Material: 316L

• Scope of delivery: O-ring (EPDM)

Accessories: process adapter
– Scope of delivery: O-ring (EPDM)
– Temperature (maximum):

130 °C (266 °F), for information on the pressure
ratings, see the "Accessories" section →  29

Accessory: weld-in adapter

A0021870

 15 Compact version

– Scope of delivery: O-ring (EPDM)
– Pressure and temperature (maximum):

+25 bar (+362 psi) at +150 °C (+302 °F)

– Approval:

EHEDG (Ra 1.5 µm (59 µin), 0.76 µm (30 µin))
3-A (Ra 0.76 µm (30 µin))

 16 Short tube version

22 Endress+Hauser

A0021894

Liquiphant FTL33

47.9 (1.89)

112 (4.41)*

136.6 (5.38)**

38 (1.5)

ø31.5

(1.24)

87.3 (3.44)

151.4 (5.96)*

176 (6.93)**

38 (1.5)

ø31.5

(1.24)

ø17.1

(0.7)

47.9 (1.89)

112 (4.41)*

136.6 (5.38)**

38 (1.5)

ø31.5

(1.24)

87.3 (3.44)

151.4 (5.96)*

176 (6.93)**

ø17.1

(0.7)

ø31.5

(1.24)

38 (1.5)

Dimensions Version Description

1GJ DIN 11851 DN25 PN40 (dairy pipe)

1HJ DIN 11851 DN32 PN40 (dairy pipe)

1JJ DIN 11851 DN40 PN40 (dairy pipe)

• Material: 316L

• Scope of delivery: excluding slotted nut, excluding
seal

• Pressure and temperature (maximum):
+25 bar (+362 psi) at +150 °C (+302 °F)
+40 bar (+580 psi) at +100 °C (+212 °F)

• Approval:

A0021790

 17 Compact version, example DN25 PN40

– EHEDG (Ra 1.5 µm (59 µin), 0.76 µm (30 µin))
– 3-A (Ra 0.76 µm (30 µin)))

Pay attention to the temperature and pressure



specifications for the seals and clips used at the
customer site.

A slotted nut can be ordered as an optional



accessory →  30

The dimensions apply for DN25, DN32, DN40.

A0022010

 18 Short tube version, example DN25 PN40

Dimensions Version Description

3CJ Tri-Clamp ISO 2852 DN25-38 (1 to 1 ½")

DIN 32676 DN25-40

3EJ Tri-Clamp ISO 2852 DN40-51 (2")

DIN 32676 DN50

• Material: 316L

• The sealing ring and clip and not included in the
delivery and can be purchased from a specialist
retailer.

• Pressure and temperature (maximum):
+25 bar (+362 psi) at +150 °C (+302 °F)

• Approval:

A0021791

 19 Compact version, example of Tri-Clamp DN25-38

– EHEDG (Ra 1.5 µm (59 µin), 0.76 µm (30 µin))
– 3-A (Ra 0.76 µm (30 µin)))

Pay attention to the temperature and pressure



specifications for the seals and clips used at the
customer site.

The dimensions apply for Tri-Clamp DN25-38,
DN40-51.

 20 Short tube version, example of Tri-Clamp DN25-38

Endress+Hauser 23

A0022009

Dimensions Version Description

47.9 (1.89)

136.6 (5.38)*

151.4 (5.96)**

38 (1.5)

ø31.5

(1.24)

87.3 (3.44)

ø17.1

(0.7)

38 (1.5)

ø31.5

(1.24)

190.8 (7.51)**

176 (6.93)*

49.5 (1.95)

88.9 (3.5)

5ZJ Flush-mounting in weld-in adapter RD52, tuning

fork can be aligned

• Material: 316L

• Scope of delivery: excluding slotted nut, excluding
seal

Accessory: weld-in adapter
– Scope of delivery: seal (VMQ)
– Pressure and temperature (maximum):

+25 bar (+362 psi) at +150 °C (+302 °F)
+40 bar (+580 psi) at +100 °C (+212 °F)

A0021891

 21 Compact version

Approval:
– EHEDG (Ra 1.5 µm (59 µin), 0.76 µm (30 µin))
– 3-A (Ra 0.76 µm (30 µin))

A slotted nut (DIN11851 F25) can be ordered as



an optional accessory →  30

Installing with weld-in adapter: The dimensions



can vary slightly depending on the torque as the
weld-in adapter is resting on a seal.

Liquiphant FTL33

 22 Short tube version

Weight

Materials

Sensor type Weight

Compact version with process adapter G ½" and valve plug
for process temperature up to 100 °C (212 °F)

Short tube version with process adapter G ½" and valve plug
for process temperature up to 150 °C (302 °F)

Material specifications in accordance with AISI and DIN EN.

Materials in contact with process

Component part Material

Tuning fork 316L

Process adapter 316L (1.4404/1.4435)

Short tube 316L (1.4404/1.4435)

Seal for weld-in adapter with G ¾", G 1" VMQ

Seal for process adapter with M24 thread EPDM

Flat seal FA (composite material based on aramid fibers

A0021892

A0030555

Pay attention to the temperature and pressure specifications for seals and clips used at the
customer site.

Endress+Hauser supplies DIN/EN process connections with threaded connection in stainless
steel in accordance with AISI 316L (DIN/EN material number 1.4404 or 14435). With regard
to their stability-temperature property, the materials 1.4404 and 1.4435 are grouped together
under 13E0 in EN 1092-1, Tab. 18. The chemical composition of the two materials can be
identical.

Approx. 140 g (4.938 oz)

Approx. 169 g (5.961 oz)

combined with NBR)

24 Endress+Hauser

Liquiphant FTL33

Materials not in contact with process

Component part Material

Housing cover with M12 connector (IP66/68/69) 316L (1.4404/1.4435)

Housing cover with M12 connector (IP65/67)

PPSUHousing cover with valve plug (IP65)

Housing cover with cable (IP66/68)

Cable gland PVDF

Design ring PBT/PC

Housing 316L (1.4404/1.4435)

Nameplate lasered onto housing

Surface roughness

Metallic surface in contact with process:

Ra ≤1.5 µm (59 µin), EHEDG

Ra ≤0.76 µm (30 µin), EHEDG, 3-A

The surface is not defined in the area of the welding seam.

Endress+Hauser 25

LED display

A

B

1

2

3

4

12

3

2
3

1

1

2
3

TEST

N

Ser. no.:

Order code:

Ext. ord. cd.:

Operability

A M12 connector, (cable without graphic)
B Valve plug

Item Function Description

Green LED (gn)

1

2

3

Lit

Yellow LED (ye)
Lit

Red LED (rd)

Flashing
Lit

Device is operational

M12 connector

Indicates the sensor state: tuning fork is covered by liquid

Valve plug / cable

Indicates the switching state:

• MAX operating mode (overfill prevention): sensor is not covered by liquid

• MIN operating mode (dry running protection): the sensor is covered by liquid

Warning/maintenance required: Fault can be remedied, e.g. incorrect wiring;
protective function if test magnet is held against the sensor for longer than 30 s
Fault/device failure: error cannot be rectified, e.g. electronic error

Liquiphant FTL33

A0016856

Function test with test magnet

For the metallic housing cover (IP69), there is no external signaling via LEDs. A connecting
cable with an M12 connector and LED display can be ordered as an accessory →  31.

Carry out a function test while the device is in operation.

Hold the test magnet against the marking on the housing for at least 2 seconds.

‣

 This inverts the current switch status, and the yellow LED changes state. When the magnet

is removed, the switching status valid at that time is adopted.

If the test magnet is held against the marking for longer than 30 seconds, the red LED will flash: The
device returns automatically to the current switch status.

The test magnet is not included in the scope of delivery. It can be ordered as an optional
accessory →  29.

A0020960

 23 Position for test magnet on housing

26 Endress+Hauser

Liquiphant FTL33

74-xx

TYPE EL - CLASS I

xxx

Certificates and approvals

The following documents are also available in the Download Area of the Endress+Hauser
website:www.endress.com → Downloads.

CE mark

EAC conformity

RCM-Tick marking

Approval

Hygienic compatibility

The measuring system is in conformity with the statutory 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.

The measuring system meets the legal requirements of the applicable EAC guidelines. These are
listed in the corresponding EAC Declaration of Conformity together with the standards applied.

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

The supplied product or measuring system meets the ACMA (Australian Communications and Media
Authority) requirements for network integrity, interoperability, performance characteristics as well
as health and safety regulations. Here, especially the regulatory arrangements for electromagnetic
compatibility are met. The products are labelled with the RCM- Tick marking on the name plate.

A0029561

CSA C/US General Purpose

The Liquiphant FTL33 was developed for use in hygienic processes. The materials in contact with the
process meet FDA requirements as well as the 3-A Sanitary Standard No. 74-06. Endress+Hauser
confirms this by affixing the 3-A sign to the device.

The following certificate copies can be ordered with the device (optional):

3-A

A0019569

EHEDG

A0022286

• If cleaning in place (CIP) is required, weld-in adapters that comply with 3-A requirements are
offered. If installed horizontally, ensure that the leakage hole is pointing down. This allows leaks
to be detected as quickly as possible.

• To avoid the risk of contamination, install the device in accordance with the design principles of
EHEDG, Document 37 "Hygienic Design and Application for Sensors" and Document 16 "Hygienic
Pipe Connections".

• Suitable connections and seals must be used in order to guarantee a hygienic design in accordance
with the specifications of 3-A and EHEDG.

• Information on 3-A and EHEDG-approved weld-in adapters can be found in the "Weld-in adapters,
process adapters and flanges" documentation, TI00426F/00.

• The gap-free connections can be cleaned of all residue using sterilization in place (SIP) and
cleaning in place (CIP), which are typical cleaning methods within the industry. Attention must be
paid to the pressure and temperature specifications of the sensor and process connections for CIP
and SIP processes.

Endress+Hauser 27

Liquiphant FTL33

Hygiene approval

Overfill prevention

Information on 3-A and EHEDG-approved weld-in adapters can be found in the "Weld-in adapters,
process adapters and flanges" documentation, TI00426F/00.

The versions can be selected via the product structure in the Product Configurator, see also
→  29.

Process connections Approvals

Version EHEDG 3-A

Thread ISO 228 G ½", 316L WBJ - -

Thread ISO 228 G 1, 316L, weld-in adapter installation accessory
Thread ISO 228 G ¾, 316L, weld-in adapter installation accessory

Thread M24, 316L, installation, adapter accessory X2J  

Thread ASME MNPT ½", 316L
Thread ASME MNPT ¾", 316L
Thread ASME MNPT 1", 316L

DIN 11851 DN25 PN40 without slotted nut, 316L
DIN 11851 DN32 PN40 without slotted nut, 316L
DIN 11851 DN40 PN40 without slotted nut, 316L

Tri-Clamp ISO 2852 DN25-38 (1 to 1-½"), 316L, DIN 32676 DN25-40
Tri-Clamp ISO 2852 DN40-51 (2"), 316L, DIN 32676 DN50

Flush-mounted, 316L, without slotted nut, weld-in adapter installation
accessory

WSJ
W5J

VAJ

VBJ
VCJ

1GJ
1HJ

1JJ

3CJ
3EJ

5ZJ

 

- -

 

 

 

Prior to mounting the device, pay attention to the WHG approval documents which can be
found on the Endress+Hauser web site: www.endress.com → Downloads.

WHG

• Overfill detection system: Z-65.11-531

• Leak detection system: Z-65.40-532

CRN approval

Inspection certificates

Manufacturer declarations

Pressure Equipment Directive

Other standards and guidelines

Versions with a CRN approval (Canadian Registration Number) are listed in the corresponding
registration documents. CRN-approved devices are labeled with registration number 0F16950.5C on
the nameplate. You can find further details on the maximum pressure values in the Download Area
of the Endress+Hauser website.

The following documents can be ordered with the device (optional):

• Acceptance test certificate as per EN 10204-3.1 (only for versions with ≤ RA 0.76 µm (30 µin))

• Surface roughness test report as per ISO 4287/Ra (only for versions with ≤ RA 0.76 µm (30 µin))

• Final inspection report

The following manufacturer declarations can be ordered (optional):

• FDA conformity

• TSE-free, materials free from animal origin

• ROHS-compliant in accordance with Endress+Hauser regulation

• Regulation EC 2023/ 2006 (GMP)

• Regulation (EC) No. 1935/2004 on materials and articles intended to come into contact with food

The device does not fall within the scope of Pressure Equipment Directive 97/23/EC as it does not
have a pressurized housing as defined in Article 1, Section 2.1.4 of the directive.

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

Regulation (EU) No. 10/2011: The device does not fall within the scope of the regulation on plastic
materials and articles intended to come into contact with food as the wetted materials are made of
stainless steel only. The silicone seals supplied comply with BfR Recommendation XV (commodities
based on silicones) and the EPDM seals supplied comply with BfR Recommendation XXI
(commodities based on natural and synthetic rubber) of the German Federal Institute for Risk
Assessment (BfR).

28 Endress+Hauser

Liquiphant FTL33

ø55 (2.17)

ø68 (2.68)

17 (0.67)

ø68 (2.68)

M24x1.5

M24x1.5

M24x1.5

18

(0.71)

17 (0.67)

ø50 (1.97)

M24x1.5

D

B

C

A

17 (0.67)

17 (0.67)

18

(0.71)

Ordering information

Ordering information

Services (optional)

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 field ->
Open product page -> The "Configure" button to the right of the product image opens the Product
Configurator.

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

Product Configurator - the tool for individual product configuration

• Up-to-the-minute configuration data

• Depending on the device: Direct input of measuring point-specific information 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 in the Endress+Hauser Online Shop

In addition, the following services can be selected via the product structure in the Product
Configurator:

• Cleaned of oil+grease

• Density setting > 0.5 g/cm³

• Switching delay setting →  11

Accessories

The adapters are optionally available with inspection certificate 3.1 EN10204.

Process adapter M24

The following process adapters are available for process connection M24. Please pay attention to the
material specifications →  24

View Process adapter M24 for: Pressure

A Varivent N 40 52023997 52024004

B DIN11851 DN50

with slotted nut

rating
PN

25 52023998 52024005

Order number Order number

with 3.1 inspection
certificate

A0016863

Endress+Hauser 29

Liquiphant FTL33

1

2

3

1

View Process adapter M24 for: Pressure

rating
PN

C Varivent F 40 52023996 52024003

D SMS 1½" 25 52026997 52026999

1 Device with process adapter M24
2 Hygienic connection (Varivent example)
3 O-ring

Order number Order number

with 3.1 inspection
certificate

A0022261

Weld-in adapter

Slotted nut

Various weld-in adapters are available for installation in vessels or pipes.

View (example) Description

G ¾" ø29 pipe installation

ø50 vessel installation
FDA-listed materials as per 21 CFR Part 175-178

G 1" ø53 pipe installation

ø60 vessel installation

M24 ø65 vessel installation

Rd52 Vessel installation

A0023557

1 Leakage hole

If installed horizontally and weld-in adapters with a leakage hole are used, ensure that the leakage
hole is pointing down. This allows leaks to be detected as quickly as possible.

Detailed information can be found in TI00426F/00/EN "Weld-in adapters, process adapters
and flanges" and in the supplementary documentation →  33.

The slotted nuts can be ordered optionally as an accessory.

View (example) Process adapter

DIN11851 (dairy
pipe)

DIN11851 F25
(also for process
adapter, flush­mounted)

DIN11851 F32 40 71258359

DIN11851 F40 40 71258361

A0023556

Material: 304 (1.4307)

PN Order number

40 52021715

30 Endress+Hauser

Liquiphant FTL33

ye 1

ye 2

gn

27.5
(1.08)

40

(1.57)

³

27.5
(1.08)

40

(1.57)

³

27.5

(1.08)

40

(1.57)

³

~52.5 (2.07)

ø20

(0.8)

Plug-in jack, cable

The plug-in jacks listed are suitable for use in the temperature range
–25 to +70 °C (–13 to +158 °F).

Engineering unit mm (in)

Plug-in jack M12 IP69 with LED Description Order number

• elbowed 90°

• terminated at one end

• 5 m (16 ft) PVC cable (orange)

• Slotted nut 316L

• Body: PVC (transparent)

A0020871

Plug-in jack M12 IP69 Description Order number

• terminated at one end

• elbowed 90°

• 5 m (16 ft) PVC cable (orange)

• Slotted nut 316L (1.4435)

• Body: PVC (orange)

52018763

52024216

A0023713

Plug-in jack M12 IP67 Description Order number

• elbowed 90°

• 5 m (16 ft)PVC cable (gray)

• Slotted nut Cu Sn/Ni

• Body: PUR (blue)

A0022292

Plug-in jack M12 IP67 Description Order number

• Self-terminated connection to M12
connector

• Slotted nut Cu Sn/Ni

• Body: PBT

A0022293

52010285

52006263

Wire colors for M12 connector: 1 = BN (brown), 2 = WT (white), 3 = BU (blue), 4 = BK (black)

Endress+Hauser 31

Liquiphant FTL33

32

TEST

N

Additional accessories

Socket wrench for mounting Description Order number

• Hexagonal

52010156

• Size across flats AF32

A0022273

Test magnet Description Order number

Information in section on Operation

71267011

→  26

A0021732

32 Endress+Hauser

Liquiphant FTL33

Supplementary documentation

The following document types are available in the Download Area of the Endress+Hauser
website: www.endress.com → Downloads.

Operating Instructions

Additional documentation

Certificates

Liquiphant FTL33 → BA01286F/00

TI00426F/00 → Weld-in adapters, process adapters and flanges (overview)

SD01622Z/00 → Weld-in adapter (installation instructions)

SD00356F/00→ Valve plug (installation instructions)

ZE01010F/00→ Overfill protection

ZE01011F/00→ Leaks

Endress+Hauser 33

*71325893*

71325893

www.addresses.endress.com