Endress+Hauser FMX21 Specifications

TI00431P/00/EN/17.18
71397581

Products

Solutions Services

Technical Information

Waterpilot FMX21

Hydrostatic level measurement

Compact transmitter for level measurement

Application

The Waterpilot FMX21 is a pressure sensor for hydrostatic level measurement.

Endress+Hauser offers three different versions of the device:

• FMX21 with a stainless steel housing, external diameter of 22 mm (0.87 in):
This version is excellently suited to drinking water applications and for use in bore
holes and wells with small diameters

• FMX21 with a stainless steel housing, external diameter of 42 mm (1.65 in):
Heavy-duty version and easy to clean thanks to flush-mounted process isolating
diaphragm, ideally suited to wastewater and wastewater treatment plants

• FMX21 with plastic insulation, external diameter of 29 mm (1.14 in):
Robust version for use in salt water and excellently suited to applications on ships
(e.g. ballast water tanks)

Your benefits

• High resistance to overload

• High-precision, robust ceramic measuring cell with long-term stability

• Climate proofed sensor thanks to completely potted electronics and 2-filter
pressure compensation system

• Simultaneous measurement of level and temperature with optionally integrated
Pt100 temperature sensor

• Accuracy
– Standard reference accuracy ±0.2 %
– PLATINUM version ±0.1 %

• Automatic density compensation to increase accuracy

• Usage in drinking water: KTW, NSF, ACS

• Approvals: ATEX, FM, CSA

• Marine approvals: GL, ABS, BV, DNV

• Extensive range of accessories provides complete measuring point solutions

Table of contents

Waterpilot FMX21

About this document ........................ 4

Document function ............................ 4

Symbols used ................................ 4

Supplementary documentation .................... 5

Terms and abbreviations ........................ 6

Turn down calculation .......................... 7

Function and system design ................... 8

Device version ............................... 8

Measuring principle ............................ 9

Measuring system ............................ 10

Level measurement with absolute pressure probe and

external pressure signal for FMX21 4 to 20 mA HART .... 12

Density compensation with the Pt100 temperature sensor

for FMX21 4 to 20 mA HART .................... 12

Communication protocol ........................ 13

System integration ........................... 13

Input .................................... 14

Measured variable ............................ 14

Measuring range ............................. 14

Input signal ................................ 15

Output .................................. 16

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

Signal range ................................ 16

Maximum load for FMX21 4 to 20 mA Analog ......... 16

Maximum load for FMX21 4 to 20 mA HART .......... 16

Damping for FMX21 4 to 20 mA HART .............. 17

Protocol-specific data for FMX21 4 to 20 mA HART ..... 18

Power supply ............................. 19

Supply voltage .............................. 19

Power consumption ........................... 19

Current consumption .......................... 19

Connecting the device ......................... 19

Terminals in the terminal box .................... 23

Probe cable ................................ 24

Cable resistance ............................. 24

Cable specifications ........................... 24

Residual ripple for FMX21 4 to 20 mA Analog ......... 24

Residual ripple for FMX21 4 to 20 mA HART .......... 24

Performance characteristics .................. 25

Reference operating conditions ................... 25

Reference accuracy ........................... 25

Resolution ................................. 25

Long-term stability ........................... 26

Influence of medium temperature ................. 26

Warm-up period ............................. 26

Response time .............................. 26

Installation ............................... 27

Installation instructions ........................ 27

Additional installation instructions ................. 27

Cable length ................................ 28

Technical data for cable ........................ 29

Cable marking .............................. 29

Cable shortening kit ........................... 30

Environment .............................. 31

Ambient temperature range ..................... 31

Storage temperature range ...................... 31

Degree of protection .......................... 31

Electromagnetic compatibility (EMC) ............... 32

Overvoltage protection ......................... 32

Process .................................. 33

Medium temperature range ...................... 33

Medium temperature limit ...................... 33

Pressure specifications ......................... 34

Mechanical construction .................... 35

Dimensions of the level probe .................... 35

Dimensions of the mounting clamp ................. 36

Dimensions of cable mounting screw ................ 36

Dimensions of terminal box IP66, IP67 with filter ....... 37

Dimensions of the TMT181 temperature head transmitter

for FMX21 4 to 20 mA Analog ................... 38

Dimensions of the TMT182 temperature head transmitter

for FMX21 4 to 20 mA HART .................... 38

Terminal box with integrated TMT181 temperature head

transmitter for FMX21 4 to 20 mA Analog ........... 39

Terminal box with integrated TMT182 temperature head

transmitter for FMX21 4 to 20 mA HART ............ 39

Additional weight ............................ 40

Testing adapter .............................. 40

RIA15 in the field housing ...................... 41

HART communication resistor .................... 41

Weight ................................... 42

Materials .................................. 43

Operability ............................... 46

FMX21 4 to 20 mA Analog ...................... 46

FMX21 4 to 20 mA HART ....................... 46

RIA15 .................................... 46

Certificates and approvals ................... 47

CE mark ................................... 47

RCM-Tick marking ............................ 47

Ex approvals ................................ 47

EAC conformity .............................. 47

Drinking water approval ........................ 47

Marine approval ............................. 47

Other standards and guidelines ................... 48

Calibration ................................. 48

Pressure Equipment Directive 2014/68/EU (PED) ....... 48

Calibration unit .............................. 48

Service ................................... 49

Downloading the Declaration of Conformity ........... 49

Ordering information ....................... 50

Scope of delivery ............................. 50

Configuration data sheet ........................ 50

2 Endress+Hauser

Waterpilot FMX21

Accessories ............................... 52

Service-specific accessories ...................... 53

Supplementary documentation ............... 54

Field of Activities ............................ 54

Technical Information ......................... 54

Operating Instructions ......................... 54

Brief Operating Instructions ..................... 54

Safety Instructions (XA) ........................ 54

Drinking water approval ........................ 54

Registered trademarks ...................... 54

GORE-TEXâ ................................ 54

TEFLONâ ................................. 54

HARTâ ................................... 54

FieldCareâ ................................. 55

DeviceCareâ ................................ 55

iTEMPâ .................................. 55

Endress+Hauser 3

About this document

DANGER

WARNING

CAUTION

NOTICE

Waterpilot FMX21

Document function

The document contains all the technical data on the device and provides an overview of the
accessories and other products that can be ordered for the device.

Symbols used Safety symbols

Symbol Meaning

Electrical symbols

Symbol Meaning Symbol Meaning

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.

Direct current Alternating current

Direct current and alternating current Ground connection

Protective ground connection

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

Symbols for certain types of information

Symbol Meaning

Permitted

Procedures, processes or actions that are permitted.

Preferred

Procedures, processes or actions that are preferred.

Forbidden

Procedures, processes or actions that are forbidden.

Tip

Indicates additional information.

Reference to documentation

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

Equipotential connection

A connection that has to be connected
to the plant grounding system: This
may be a potential equalization line
or a star grounding system depending
on national or company codes of
practice.

Reference to page

Reference to graphic

Visual inspection

4 Endress+Hauser

Waterpilot FMX21

,…,

Symbols in graphics

Symbol Meaning

1, 2, 3 ... Item numbers

Series of steps

A, B, C, ... Views

A-A, B-B, C-C, ... Sections

Supplementary documentation

The document types listed are available:
In the Download Area of the Endress+Hauser Internet site: www.endress.com → Download

Brief Operating Instructions (KA): getting the 1st measured value quickly

FMX21 4 to 20 mA Analog - KA01244P:

FMX21 4 to 20 mA HART - KA01189P:

The Brief Operating Instructions contain all the essential information from incoming acceptance to
initial commissioning.

Operating Instructions (BA): your comprehensive reference

FMX21 4 to 20 mA Analog - BA01605P:

FMX21 4 to 20 mA HART - BA00380P:

RIA15 - BA01170K:

These Operating Instructions contain all the information that is required in various phases of the life
cycle of the device: from product identification, incoming acceptance and storage, to mounting,
connection, operation and commissioning through to troubleshooting, maintenance and disposal.

Safety Instructions (XA)

Depending on the approval, the following Safety Instructions (XA) are supplied with the device. They
are an integral part of the Operating Instructions.

Directive Type of protection Category Documentation Option

ATEX Ex ia IIC II 2 G XA00454P BD

ATEX Ex nA IIC II 3 G XA00485P BE

IECEx Ex ia IIC n/a XA00455P IC

CSA C/US Ex ia IIC n/a ZD00232P

(960008976)

FM AEx ia IIC n/a ZD00231P

(960008975)

NEPSI Ex ia IIC n/a XA00456P NA

INMETRO Ex ia IIC n/a XA01066P MA

1)

CE

FE

1) Product Configurator order code for "Approval"

The nameplate indicates the Safety Instructions (XA) that are relevant to the device.

Endress+Hauser 5

Terms and abbreviations

URL OPLMWP

LRL

0

p

LRV

URV

1

2

3

4

Waterpilot FMX21

Item Term/abbreviation Explanation

1 OPL The OPL (over pressure limit = sensor overload limit) for the measuring device depends on the lowest-rated

element, with regard to pressure, of the selected components, i.e. the process connection has to be taken into
consideration in addition to the measuring cell. Also observe pressure-temperature dependency.
The OPL may only be applied for a limited period of time.

2 MWP The MWP (maximum working pressure) for the sensors depends on the lowest-rated element, with regard to

pressure, of the selected components, i.e. the process connection has to be taken into consideration in addition to
the measuring cell. Also observe pressure-temperature dependency.
The MWP may be applied at the device for an unlimited period.
The MWP can also be found on the nameplate.

3 Maximum sensor

measuring range

4 Calibrated/adjusted span Span between LRV and URV

p - Pressure

- LRL Lower range limit

- URL Upper range limit

- LRV Lower range value

- URV Upper range value

- TD (turn down) Turn down

- PE Polyethylene

- FEP Fluorinated ethylene propylene

- PUR Polyurethane

Span between LRL and URL
This sensor measuring range is equivalent to the maximum calibratable/adjustable span.

Factory setting: 0 to URL
Other calibrated spans can be ordered as customized spans.

Example - see the following section.

A0029505

6 Endress+Hauser

Waterpilot FMX21

LRV

URLURV

LRL

1 = 2

3

Turn down calculation

1 Calibrated/adjusted span
2 Zero point-based span (4 to 20 mA Analog: customer-specific span can only be set at the factory when

ordered)

3 URL sensor

Example

• Sensor:10 bar (150 psi)

• Upper range value (URL) = 10 bar (150 psi)

Turn down (TD):

• Calibrated/adjusted span: 0 to 5 bar (0 to 75 psi)

• Lower range value (LRV) = 0 bar (0 psi)

• Upper range value (URV) = 5 bar (75 psi)

A0029545

TD =

URL

|URV - LRV|

10 bar (150 psi)

TD =

|5 bar (75 psi) - 0 bar (0 psi)|

In this example, the TD is 2:1.
This span is based on the zero point.

= 2

Endress+Hauser 7

Function and system design

Device version

Outer diameter 22 mm (0.87 in) 42 mm (1.65 in) Max. 29 mm (1.14 in)

Waterpilot FMX21

A0018640

Field of application Hydrostatic level measurement

in deep wells e.g. drinking water

Hydrostatic level measurement
in wastewater

A0018641

Hydrostatic level measurement in saltwater

NOTICE

The Waterpilot is not suitable for use in biogas plants since the gases can diffuse through the elastomers
(seals, cable).

For applications involving biogas, Endress+Hauser offers the Deltapilot level measuring device.

‣

Process connection • Suspension clamp

• Cable mounting screw with G 1½" A or NPT 1½" thread

Extension cable PE, PUR, FEP →  45

Seals • FKM Viton

• EPDM

1)

Measuring ranges • Relative pressure: 0 to 0.1 bar (0 to 1.5 psi) to

0 to 20 bar (0 to 300 psi)

• Absolute pressure: 0 to 2 bar (0 to 30 psi) to
0 to 20 bar (0 to 300 psi)

FKM Viton • FKM Viton

• EPDM

1)

• Relative pressure:
0 to 0.1 bar (0 to 1.5 psi) to
0 to 4 bar (0 to 60 psi)

• Absolute pressure: 0 to 2 bar (0 to 30 psi)
to 0 to 4 bar (0 to 60 psi)

• Customer-specific measuring ranges; factory-calibrated.

• The following output units can be configured: %, mbar, bar, kPa, MPa, mmH2O, mH2O, inH2O, ftH2O, psi and
numerous level units.

Overload to 40 bar (600 psi) to 25 bar (375 psi)

Process temperature range –10 to +70 °C (+14 to +158 °F) 0 to +50 °C (+32 to +122 °F)

Reference accuracy • ±0.2 % of the set span

• Optional: ±0.1 % of set span (PLATINUM version)

Supply voltage 10.5 to 35 V DC, Ex: 10.5 to 30 V DC

Output • 4 to 20 mA Analog

• 4 to 20 mA HART (can be inverted) with superimposed digital communication protocol HART 6.0, 2-wire

Options Drinking water approval ―

• Wide range of approvals, including ATEX, FM, CSA

• Numerous accessories

• Integrated Pt100 temperature sensor and TMT181 temperature head transmitter (4 to 20 mA)

• Integrated Pt100 temperature sensor and TMT182 temperature head transmitter (4 to 20 mA HART)

• Marine approval

Specialties • High-precision, robust ceramic measuring cell with long-term stability

• Automatic density compensation

• Customer-specific cable marking

A0018642

1) Recommended for drinking water applications, not suitable for use in hazardous areas.

8 Endress+Hauser

Waterpilot FMX21

h

2

1

p

atm

p

hydr.

p = p + p

atm hydr.

p

atm

p

atm

h ~ p

r • g

h =

p

Rel.: p = (p + p ) - p

sens atm hydr. atm

p = p + p

atm hydr.

Abs.: p = (p + p )

sens atm hydr.

Measuring principle

The ceramic measuring cell is a dry measuring cell i.e. the pressure acts directly on the robust,
ceramic process isolating diaphragm of the Waterpilot FMX21. Changes in air pressure are guided
via a pressure compensation tube through the extension cable to the rear of the ceramic process
isolating diaphragm and are compensated for. A pressure-dependent change in capacitance, caused
by the movement of the process isolating diaphragm, is measured at the electrodes of the ceramic
carrier. The electronics unit then converts this to a signal that is proportional to the pressure and
linear to the level.

1 Ceramic measuring cell
2 Pressure compensation tube
h Height level
p Total pressure = atmospheric pressure + hydrostatic pressure
ρ Density of the medium
g Acceleration due to gravity
P

Hydrostatic pressure

hydr.

P

Atmospheric pressure

atm

P

Pressure displayed on the sensor

sens

Temperature measurement with optional Pt100 resistance thermometer

1)

For simultaneous measurement of level and temperature, Endress+Hauser offers the Waterpilot
FMX21 with an optional 4-wire Pt100 resistance thermometer →  52. The Pt100 is categorized
as Accuracy Class B as per DIN EN 60751.

Temperature measurement with optional Pt100 and TMT181 temperature head transmitter
for FMX21 4 to 20 mA Analog

To convert the temperature signal to an analog, scalable 4 to 20 mA output signal, Endress+Hauser
also offers the TMT181 temperature head transmitter.

1)

Ordering information: →  50; "Accessories" →  52. Technical Information TI00070R.

Temperature measurement with optional Pt100 and TMT182 temperature head transmitter
for FMX21 4 to 20 mA HART

1)

Endress+Hauser also offers the TMT182 temperature head transmitter with HART protocol for
converting the temperature signal to an analog, scalable 4 to 20 mA output signal superimposed
with HART 6.0. See also: "Density compensation with Pt100 temperature sensor" →  12

Ordering information: →  50; "Accessories" →  52. Technical Information TI00078R.

A0019140

1) Not for use in hazardous areas.

Endress+Hauser 9

Measuring system Application examples

A

B

C

D

5

5

5

5

2

1

4

4

4

4

RN221N

RTA421

RIA45RIA15

ON

1

2

E

-+-

RIA45

RIA452

Memograph M

Ecograph T

RIA452

Endress+Hauser

%

RIA46

12401.5

E

-+-

ON

1

2

3

3

3

3

As standard, the complete measuring system consists of a Waterpilot FMX21 and a transmitter
power supply unit with a supply voltage of 10.5 to 30 V DC (hazardous areas) or 10.5 to 35 V DC
(non-hazardous areas).

Possible measuring point solutions with a transmitter and evaluation units from Endress+Hauser:

Waterpilot FMX21

A0018644

1 Waterpilot FMX21
2 4 to 20 mA or 4 to 20 mA HART
3+4 Overvoltage protection, e.g. HAW from Endress+Hauser (not for use in hazardous areas) HAW562; for DIN

rail: HAW562/intrinsically safe HAW562Z. Selection in accordance with supply voltage.

5 Power supply

A: Easy and cost-effective measuring point solution: power supplied to the Waterpilot in hazardous
and non-hazardous areas via the RN221N active barrier. Power supply and additional control of two
appliances, such as pumps, via the RTA421 limit value switch with local display.

B: The RIA45 evaluation unit (for panel mounting) or the RIA46 evaluation unit (for field
installation) offers power supply, local display and two switch outputs. If the RIA15 is used, the basic
settings for the FMX21 HART can be made via the display module.

C: If several pumps are used, the pump service life can be prolonged by alternate switching. With
alternating pump control, the pump which was out of service for the longest period of time is
switched on. The RIA452 evaluation unit (for panel mounting) offers this option in addition to
numerous other functions.

D: State-of-the-art recording technology with graphic display recorders from Endress+Hauser, such
as Ecograph T, Memograph M for documentation, monitoring, visualization and archiving purposes.

10 Endress+Hauser

Waterpilot FMX21

RIA452

ENDRESS+HAUSER
RMA422

RMA42

E

F

RIA46

RIA45

12401.5

E

-+-

ON

1

2

ON

1

2

E

-+-

RIA45

ON

1

2

E

-+-

RIA45

ON

1

2

E

-+-

RIA45

ON

1

2

E

-+-

RIA45

RIA45

2

3

4

3

4

5

5

5

5

6

6

6

7

7

7

1

2

RIA452

Endress+Hauser

%

ENDRESS+HAUSER
RMA422

RMA42

Application examples with the Pt100

As standard, the complete measuring system consists of a Waterpilot FMX21 and a transmitter
power supply unit with a supply voltage of 10.5 to 30 V DC (hazardous areas) or 10.5 to 35 V DC
(non-hazardous areas).

Possible measuring point solutions with a transmitter and evaluation units from Endress+Hauser:

A0018645

1 Waterpilot FMX21
2 Connection for integrated Pt100 in the FMX21
3 Temperature for 4 to 20 mA or 4 to 20 mA HART
4 Level for 4 to 20 mA or 4 to 20 mA HART
5 Overvoltage protection, e.g. HAW from Endress+Hauser (not for use in hazardous areas) on the sensor side

6 Overvoltage protection, e.g. HAW from Endress+Hauser (not for use in hazardous areas) on the supply side

7 Power supply

E: If you wish to measure, display and evaluate the temperature as well as the level, e.g. to monitor
the temperature in fresh water for the purpose of detecting temperature limits for germ formation,
the options available to you include the following: The optionally available TMT182 temperature
head transmitter can convert the Pt100 signal to a 4 to 20 mA signal or a 4 to 20 mA HART signal
and transfer it to any commonly used evaluation unit. The RMA42, RIA45 and RIA452 evaluation
units also offer a direct input for the Pt100 signal.

for field installation: HAW569; for DIN rail: HAW562/intrinsically safe HAW562Z. Selection in accordance
with supply voltage.

for DIN rail: HAW561 (115/230 V) and HAW561K (24/48 V AC/DC). Selection in accordance with supply
voltage.

F: If you wish to record and evaluate the level and temperature measured value with one device, use
the RMA42, RIA45 and RIA46 evaluation units with two inputs. It is even possible to mathematically

Endress+Hauser 11

link the input signals with this unit. These evaluation units are HART-compatible.

Level measurement with

FXN520

1

2

3

4

1

2

3

4

FXN520

absolute pressure probe and
external pressure signal for
FMX21 4 to 20 mA HART

Waterpilot FMX21

A0018757

1 Fieldgate FXA520
2 Multidrop Connector FXN520
3 Cerabar
4 Waterpilot FMX21 4 to 20 mA HART

It is advisable to use an absolute pressure probe for applications in which condensation can occur.
For level measurement using an absolute pressure probe, the measured value is affected by
fluctuations in the ambient pressure. To correct the resulting measured error, you can connect an
external absolute pressure sensor (e.g. Cerabar) to the HART signal line, switch the Waterpilot to
burst mode and operate the Cerabar in the "Electr. Delta P" mode. The external absolute pressure
sensor then calculates the difference between the two pressure signals and can thus determine the
level precisely. Only one level measured value can be corrected in this way.

If using intrinsically safe devices, the regulations for interconnecting intrinsically safe circuits as
stipulated in IEC60079-14 (proof of intrinsic safety) must be observed.

Density compensation with the Pt100 temperature sensor for FMX21 4 to 20 mA HART

The Waterpilot FMX21 4 to 20 mA HART can correct measured errors that result from fluctuations
in the density of the water caused by temperature. Users can choose from the following options:

Use the internally measured sensor temperature of the FMX21

The internally measured sensor temperature is calculated in the Waterpilot FMX21 4 to 20 mA
HART for density compensation. The level signal is thus corrected according to the density
characteristic line of water.

Use the optional internal temperature sensor for density compensation in a suitable HART
master (e.g. PLC)

The Waterpilot FMX21 4 to 20 mA HART is optionally available with a Pt100 temperature sensor.
To convert the Pt100 signal to a 4 to 20 mA HART signal, Endress+Hauser also offers the TMT182
temperature head transmitter.

The temperature and pressure signals are queried by a HART master (e.g. PLC), where a corrected
level value can be generated using a stored linearization table or density function (of a chosen
medium).

A0018763

1 HART master, e.g. PLC (programmable logic controller)
2 FXN520 Multidrop Connector
3 TMT182 temperature head transmitter
4 Waterpilot FMX21 4 to 20 mA HART

12 Endress+Hauser

Waterpilot FMX21

FXN520

4

1

2

3

Use an external temperature signal, which is transmitted to the FMX21 4 to 20 mA HART via
the HART burst mode

The Waterpilot FMX21 4 to 20 mA HART is optionally available with a Pt100 temperature sensor.
With this option, the signal of the Pt100 is evaluated with a HART-compliant temperature
transmitter (min. HART 5.0) that supports the BURST mode. The temperature signal can thus be
transmitted to the FMX21 4 to 20 mA HART. The FMX21 4 to 20 mA HART uses this signal for
density correction of the level signal.

The TMT182 temperature head transmitter is not suitable for this configuration.

A0018764

1 Fieldgate FXA520
2 Multidrop Connector FXN520
3 HART-compatible temperature transmitter (e.g. TMT82)
4 Waterpilot FMX21 4 to 20 mA HART

Communication protocol

System integration

Without additional compensation due to the anomaly of water, errors of up to 4% may occur at a
temperature of 70 °C (158 °F), for example. With density compensation, this error can be decreased
to 0.5 % in the entire temperature range from 0 to +70 °C (+32 to +158 °F).

More information can be found in the Technical Information:

• TI01010T: TMT82 temperature transmitter (4 to 20 mA HART)

• TI00369F: Fieldgate FXA520

• TI00400F: Multidrop Connector FXN520

• 4 to 20 mA Analog
Ordering information: Product Configurator order code for "Output", option "1"

• 4...20 mA HART
Ordering information: Product Configurator order code for "Output", option "2"

The device can be given a tag name.

Ordering information: Product Configurator order code for "Identification", option "Z1"

Endress+Hauser 13

Input

Measured variable FMX21 + Pt100 (optional)

• Hydrostatic pressure of a liquid

• Pt100: Temperature

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

Temperature

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

Temperature

Waterpilot FMX21

Measuring range

• Customer-specific measuring ranges or calibration that has been preset in the factory

• Temperature measurement of –10 to +70 °C (+14 to +158 °F) with Pt100 (optional)

Relative pressure

Sensor measuring range Lowest calibratable span

[bar (psi)] [bar (psi)] [bar

1)

Vacuum resistance Option

(psi

abs

)]

abs

0.1 (1.5) 0.01 (0.15) 0.3 (4.5) 1C

0.2 (3.0) 0.02 (0.3) 0.3 (4.5) 1D

0.4 (6.0) 0.04 (1.0) 0 1F

0.6 (9.0) 0.06 (1.0) 0 1G

1.0 (15.0) 0.1 (1.5) 0 1H

2.0 (30.0) 0.2 (3.0) 0 1K

4.0 (60.0) 0.4 (6.0) 0 1M

10.0 (150)

20.0 (300)

3)

3)

1.0 (15) 0 1P

2.0 (30) 0 1Q

1) Largest turn down that can be configured at the factory: 10:1, higher turn down can be configured on
request or in the device (for FMX21 4 to 20 mA HART).

2) Product Configurator order code for "Sensor range"

3) These measuring ranges are not available for the special version with plastic insulation, external diameter
of 29 mm (1.14 in).

2)

Absolute pressure

Sensor measuring range Lowest calibratable span

[bar (psi)] [bar (psi)] [bar

1)

Vacuum resistance Option

(psi

abs

)]

abs

2.0 (30.0) 0.2 (3.0) 0 2K

4.0 (60.0) 0.4 (6.0) 0 2M

10.0 (150)

20.0 (300)

3)

3)

1.0 (15) 0 2P

2.0 (30) 0 2Q

1) Largest turn down that can be configured at the factory: 10:1, higher turn down can be configured on
request or in the device (for FMX21 4 to 20 mA HART).

2) Product Configurator order code for "Sensor range"

3) These measuring ranges are not available for the special version with plastic insulation, external diameter
of 29 mm (1.14 in).

2)

14 Endress+Hauser

Waterpilot FMX21

Input signal FMX21 + Pt100 (optional)

• Change in capacitance

• Pt100: Change in resistance

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

Pt100 resistance signal, 4 wire

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

Pt100 resistance signal, 4 wire

Endress+Hauser 15

Output

R

Lmax

– 2 0.09•

• L – R

U – 10.5 V

23 mA

W

m

£

413

630

195

1065

35

20

25

10.5

15

847

30

R

[ ]W

U

[ ]

V

– R

U – 8 V

0.025 A

£

R

Lmax

A

B

30

20 25158

35

10

1080

880

480

280

680

80

R

[ ]W

U

[ ]

V

add

add

Output signal FMX21 + Pt100 (optional)

• 4 to 20 mA Analog, 2-wire for hydrostatic pressure measured value.

Ordering information: Product Configurator order code for "Output", option "1"

• 4 to 20 mA HART with superimposed digital communication protocol HART 6.0, 2-wire for

hydrostatic pressure measured value.
Ordering information: Product Configurator order code for "Output", option "2"
Options:
– Max. alarm (factory setting 22mA): can be set from 21 to 23 mA
– Hold measured value: last measured value is held
– Min. alarm: 3.6 mA

• Pt100: temperature-dependent resistance value

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

4 to 20 mA Analog for temperature measured value, 2-wire

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

4 to 20 mA HART with superimposed digital communication protocol HART 5.0 for temperature
measured value, 2-wire

Waterpilot FMX21

Signal range

Maximum load for FMX21 4 to 20 mA Analog

3.8 mA to 20.5 mA

The maximum load resistance depends on the supply voltage (U) and must be determined
individually for each current loop, see formula and diagrams for FMX21 and temperature head
transmitter. The total resistance resulting from the resistances of the connected devices, the
connecting cable and, where applicable, the resistance of the extension cable may not exceed the
load resistance value.

A FMX21 4 to 20 mA Analog load chart for estimating the load resistance. Additional resistances, such as the

resistance of the extension cable, have to be subtracted from the value calculated as shown in the equation.

B Load diagram for TMT181 temperature head transmitter for estimating the load resistance. Additional

resistances must be subtracted from the value calculated as shown in the equation

R

Max. load resistance [Ω]

Lmax

R

Additional resistances such as resistance of evaluating device and/or display unit, cable resistance [Ω]

add

U Supply voltage [V]
L Basic length of extension cable [m] (cable resistance per wire 0.09 Ω/m)

Maximum load for FMX21 4 to 20 mA HART

16 Endress+Hauser

The maximum load resistance depends on the supply voltage (U) and must be determined
individually for each current loop, see formula and diagrams for FMX21 and temperature head

When using the measuring device in hazardous areas, installation must comply with the
corresponding national standards and regulations and the Safety Instructions or Installation or
Control Drawings (XA).

A0030561-EN

Waterpilot FMX21

R

Lmax

– 2 0.09•

• L – R

U – 10.5 V

23 mA

W

m

£

413

630

195

1065

35

20

25

10.5

15

847

30

R

[ ]W

U

[ ]

V

– R

U – 11.5 V

0.023 A

£

R

Lmax

370

587

152

1022

35

20

25

11.5

15

804

30

R

[ ]W

U

[ ]

V

A B

add add

transmitter. The total resistance resulting from the resistances of the connected devices, the
connecting cable and, where applicable, the resistance of the extension cable may not exceed the
load resistance value.

A0026500-EN

A FMX21 4 to 20 mA HART load chart for estimating the load resistance. Additional resistances, such as the

resistance of the extension cable, have to be subtracted from the value calculated as shown in the equation.

B Load diagram for TMT182 temperature head transmitter for estimating the load resistance. Additional

resistances must be subtracted from the value calculated as shown in the equation

R

Max. load resistance [Ω]

Lmax

R

Additional resistances such as resistance of evaluating device and/or display unit, cable resistance [Ω]

add

U Supply voltage [V]
L Basic length of extension cable [m] (cable resistance per wire 0.09 Ω/m)

• When using the measuring device in hazardous areas, installation must comply with the
corresponding national standards and regulations and the Safety Instructions or Installation
or Control Drawings (XA).

• When operating via a handheld terminal or via a PC with an operating program, a minimum
communication resistance of 250 Ω must be taken into account.

Damping for FMX21 4 to 20 mA HART

• Via HART handheld device or PC with operating program: continuous from 0 to 999 s

• Factory setting: 2 s

Endress+Hauser 17

Waterpilot FMX21

Protocol-specific data for FMX21 4 to 20 mA HART

Manufacturer ID 17 (11 hex)

Device type code 25 (19 hex)

Device revision 01 (01 hex) - SW version 01.00.zz

HART specification 6

DD revision 01

Device description files
(DTM, DD)

HART load Min. 250 Ω

HART device variables The dynamic variables SV, TV and QV may be assigned to any device variable:

Supported functions • Burst mode

Information and files under:

• www.endress.com

• www.fieldcommgroup.org

Standard process values for SV, TV (second and third device variable) are
dependent on the measuring mode:

• Pressure

• Level

Standard process value for QV (fourth device variable) is the sensor
temperature:

Temperature

Measured values for PV (first device variable) are dependent on the measuring
mode:

• Pressure

• Level

• Tank content

• Additional transmitter status

• Device locking

• Alternative measuring modes

• Catch variable

• Long tag

18 Endress+Hauser

Waterpilot FMX21

Power supply

WARNING

L

Electrical safety is compromised by an incorrect connection!

When using the measuring device in a hazardous area, the relevant national standards and

‣

guidelines as well as the Safety Instructions (XAs) or installation or control drawings (ZDs) must
be adhered to. All data relating to explosion protection can be found in separate documentation
which is available on request. This documentation is supplied with the devices as standard
→  5

Supply voltage FMX21 + Pt100 (optional)

• 10.5 to 35 V (not hazardous areas)

• 10.5 to 30 V (hazardous areas)

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

8 to 35 V DC

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

11.5 to 35 V DC

Power consumption FMX21 + Pt100 (optional)

• ≤ 0.805 W at 35 V DC (non-hazardous area)

• ≤ 0.690 W at 30 V DC (hazardous area)

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

≤ 0.875 W at 35 V DC

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

≤ 0.805 W at 35 V DC

Current consumption FMX21 + Pt100 (optional)

Max. current consumption: ≤ 23 mA
Min. current consumption: ≥ 3.6 mA

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

• Max. current consumption: ≤ 25 mA

• Min. current consumption: ≥ 3.5 mA

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

• Max. current consumption: ≤ 23 mA

• Min. current consumption: ≥ 3.5 mA

Connecting the device

• Waterpilot
Reverse polarity protection is integrated in the Waterpilot FMX21 and the temperature head
transmitter. Changing the polarities will not result in damage to the devices.

• The cable must end in a dry room or a suitable terminal box. The terminal box (IP66/IP67) with
GORE-TEX® filter from Endress+Hauser is suitable for outdoor installation. The terminal box may
be ordered as an accessory using the order code for the FMX21, Product Configurator order code
for "Accessories enclosed", option "PS".

The electrical connection is established with the corresponding wires of the probe cable and with the
optional use of the terminal box →  37 and a power supply (e.g. RN221N active barrier
→  10).

Endress+Hauser 19

Waterpilot FMX21

RD

BK

RD

BK

WH

YE BU

BR

a

A B

e

)

)

)

)

c

c

d

d

b

b

a

FMX21

FMX21

RD BKWHYE

BU

BR

)

)

a

b
c

f

d

cd

g

6

5

4

3

2

1

e

FMX21 4...20 mA Analog

Waterpilot with Pt100

A0019441

A Waterpilot FMX21
B Waterpilot FMX21 with Pt100 (not for use in hazardous areas); option "NB", Product Configurator order code

for "Accessories"
a Not for the FMX21 with external diameter of 29 mm (1.14 in)
b 10.5 to 30 V DC (hazardous area), 10.5 to 35 V DC
c 4...20 mA
d Resistance (RL)

e Pt100

Waterpilot with Pt100 and TMT181 temperature head transmitter for
FMX21 4 to 20 mA Analog

a Not for the FMX21 with external diameter of 29 mm (1.14 in)
b 10.5 to 35 V DC
c 4...20 mA
d Resistance (RL)

e TMT181 temperature head transmitter (4 to 20 mA) (not for use in hazardous areas)
f 8 to 35 V DC
g Pt100

1...6 Pin assignment

20 Endress+Hauser

Ordering information:

Pt100: Product Configurator order code for "Accessories mounted", option "NB"

A0030945

Waterpilot FMX21

)

a

b

c

e

f

d

cd

g

RD BKWHYE

BU

BR

2

1

6

5

4

3

)

FMX21 4...20 mA HART

TMT181: Product Configurator order code for "Accessories enclosed", option "PX"

Waterpilot with Pt100 and TMT182 temperature head transmitter for
FMX21 4 to 20 mA HART

A0018780

a Not for the FMX21 with external diameter of 29 mm (1.14 in)
b 10.5 to 35 V DC
c 4...20 mA
d Resistance (RL)

e TMT182 temperature head transmitter (4 to 20 mA) (not for use in hazardous areas)
f 11.5 to 35 V DC
g Pt100

1...6 Pin assignment

Ordering information:

Pt100: Product Configurator order code for "Accessories mounted", option "NB"

TMT182: Product Configurator order code for "Accessories enclosed", option "PT"

Endress+Hauser 21

Waterpilot FMX21

Y

I

R

s

DC

1

2

3

LED

-

+

Y

I

R

s

DC

1

2

3

LED

-

+

Waterpilot FMX21 with RIA15

The RIA15 remote display can be ordered together with the device.

Product structure, feature 620 "Accessory enclosed":

• Option R4 "Remote display RIA15 non-hazardous area, field housing"

• Option R5 "Remote display RIA15 Ex= explosion protection approval, field housing"

Compensation of the atmospheric pressure must be ensured for the installation. A black, vented
cable gland is supplied for this purpose.

The RIA15 process display unit is loop-powered and does not require any external power
supply.

The voltage drop to be taken into account is:

• ≤1 V in the standard version with 4 to 20 mA communication

• ≤1.9 V with HART communication

• and an additional 2.9 V if display light is used

Circuit diagram / Description

Waterpilot FMX21 connection, HART
communication and RIA15 without
backlight

Waterpilot FMX21 connection, HART
communication and RIA15 with
backlight

A0019567

 1 Waterpilot FMX21 block diagram, HART with RIA15 process

display unit without light

1 Waterpilot FMX21
2 Power supply
3 HART resistance

A0019568

 2 Waterpilot FMX21 block diagram, HART with RIA15 process

display unit with light

1 Waterpilot FMX21
2 Power supply
3 HART resistance

22 Endress+Hauser

Waterpilot FMX21

1

LED

-

+

3

2

Y

I

R

s

DC

1

3

2

Y

I

R

s

DC

LED

-

+

Waterpilot FMX21, RIA15 with installed HART communication resistor module

The HART communication module for installation in the RIA15 can be ordered together with
the device.

Product structure, feature 620 "Accessory enclosed":

• Option R6 "HART communication resistor hazardous / non-hazardous area"

• The voltage drop to be taken into account is max. 7 V
Compensation of the atmospheric pressure must be ensured for the installation. A black, vented

cable gland is supplied for this purpose.

Circuit diagram / Description

Waterpilot FMX21 connection and
RIA15 without backlight

A0020839

 3 Waterpilot FMX21 block diagram, RIA15 without light, HART

communication resistor module

1 HART communication resistor module
2 Waterpilot FMX21
3 Power supply

Waterpilot FMX21 connection and
RIA15 with backlight

A0020840

 4 Waterpilot FMX21 block diagram, RIA15 with light, HART

communication resistor module

1 HART communication resistor module
2 Waterpilot FMX21
3 Power supply

Wire colors

RD = red, BK = black, WH = white, YE = yellow, BU = blue, BR = brown

Connection data

Connection classification as per IEC 61010-1:

• Overvoltage category 1

• Pollution level 1

Connection data in the hazardous area

See relevant XA.

Terminals in the terminal box

• Three terminals as standard in the terminal box (terminal box can optionally be ordered as an
enclosed accessory →  52)

• 4-terminal strip can be ordered as an accessory, order number: 52008938 cable cross-section 0.08
to 2.5 mm2 (28 to 14 AWG)

The 4-terminal strip is not designed for use in hazardous areas incl. CSA GP.

Endress+Hauser 23

Waterpilot FMX21

Probe cable

Cable resistance

Cable specifications

• Overall external diameter: 8 mm (0.31 in) ±0.25 mm (0.01 in)

• Pressure compensation tube with Teflon filter: External diameter of 2.5 mm (0.1 in), internal
diameter of 1.5 mm (0.06 in)

Cross-section

• FMX21: 3 x 0.2 mm2 (3 x 26 AWG) + pressure compensation tube with Teflon filter

• FMX21 with Pt100 (optional): 7 x 0.2 mm2 (7 x 26 AWG) + pressure compensation tube with
Teflon filter

per wire: ≤ 0.09 Ω/m

Endress+Hauser recommends using shielded, twisted-pair two-wire cables.

The probe cables are shielded for device versions with outer diameters of 22 mm (0.87 in) and
42 mm (1.65 in).

FMX21 + Pt100 (optional)

• Commercially available instrument cable

• Terminals, terminal box: 0.08 to 2.5 mm2 (28 to 14 AWG)

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

• Commercially available instrument cable

• Terminals, terminal box: 0.08 to 2.5 mm2 (28 to 14 AWG)

• Transmitter connection: max. 1.75 mm2 (15 AWG)

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

• Commercially available instrument cable

• Terminals, terminal box: 0.08 to 2.5 mm2 (28 to 14 AWG)

• Transmitter connection: max. 1.75 mm2 (15 AWG)

Residual ripple for FMX21 4 to 20 mA Analog

Residual ripple for FMX21 4 to 20 mA HART

FMX21 + Pt100 (optional)

No impact on the 4 to 20 mA signal up to ±5 % residual ripple within the permitted voltage range.

TMT181 temperature head transmitter (optional)

Uss ≥ 5 V at U ≥ 13 V, f

max.

= 1 kHz

FMX21 + Pt100 (optional)

No impact on the 4 to 20 mA signal up to ±5 % residual ripple within the permitted voltage range
(according to HART Hardware Specification HCF_SPEC-54 (DIN IEC 60381-1)).

TMT182 temperature head transmitter (optional)

Uss ≥ 3 V at U ≥ 13 V, f

max.

= 1 kHz

24 Endress+Hauser

Waterpilot FMX21

Performance characteristics

Reference operating conditions

Reference accuracy FMX21 + Pt100 (optional)

FMX21 + Pt100 (optional)

• As per IEC 60770

• Ambient temperature TU = constant, in the range of +21 to +33 °C (+70 to +91 °F)

• Humidity φ = constant, in the range of 20 to 80 % rH

• Ambient pressure pU = constant, in the range of 860 to 1 060 mbar (12.47 to 15.37 psi)

• Position of measuring cell constant, vertical in the range of ±1°

• Input of LOW SENSOR TRIM and HIGH SENSOR TRIM for lower range value and upper range value
(only for HART)

• Supply voltage constant: 21 V DC to 27 V DC

• Load with HART: 250 Ω

• Pt100: DIN EN 60770, TU = +25 °C (+77 °F)

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

Calibration temperature +23 °C (+73 °F) ±5 K

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

Calibration temperature +25 °C (+77 °F) ±5 K

The reference accuracy comprises the non-linearity after limit point configuration, hysteresis and
non-reproducibility in accordance IEC 60770.

Standard version
Setting ±0.2 %
– to TD 5:1: < 0.2 % of set span
– from TD 5:1 to TD 20:1 ±(0.02 x TD+0.1)

Platinum version

• Setting ±0.1 % (optional)
– to TD 5:1: < 0.1 % of set span
– from TD 5:1 to TD 20:1 ±(0.02 x TD)

• Class B as per DIN EN 60751
Pt100: max. ±1 K

2)

:

3)

:

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

• ±0.2 K

• With Pt100: max. ±0.9 K

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

• ±0.2 K

• With Pt100: max. ±0.9 K

Resolution

2) Ordering information: Product Configurator order code for "Reference accuracy", option "G"

3) Ordering information: Product Configurator order code for "Reference accuracy", option "D"

Current output: 1 μA

Reading cycle

HART commands: on average 2 to 3 per second

Endress+Hauser 25

Long-term stability FMX21 + Pt100 (optional)

• ≤ 0.1 % of URL/year

• ≤ 0.25 % of URL/5 years

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

≤ 0.1 K per year

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

≤ 0.1 K per year

Waterpilot FMX21

Influence of medium temperature

Warm-up period FMX21 + Pt100 (optional)

Response time FMX21 + Pt100 (optional)

• Thermal change in the zero output and the output span:
0 to +30 °C (+32 to +86 °F): < (0.15 + 0.15 x TD)% of set span
–10 to +70 °C (+14 to +158 °F): < (0.4 + 0.4 x TD)% of set span

• Temperature coefficient (TK) of the zero output and the output span
–10 to +70 °C (+14 to +158 °F): 0.1 % / 10 K of URL

• FMX21: < 6 s

• Pt100: 300 s

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

4 s

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

4 s

• FMX21: 400 ms (T90 time), 500 ms (T99 time)

• Pt100: 160 s (T90 time), 300 s (T99 time)

26 Endress+Hauser

Waterpilot FMX21

1

2

3

4

5

6

7

8

9

Dat./Insp.:

FW.Ver.: xxxx
Dev.Rev.: xxxx

Cal./Adj.

Mat:

L=

Ser. no.:xxxxxxxxxxxxx
Order code: xxxxxxxxxxxxxxxxxxxxxx
Ext. order code:xxxxxxxxxxxxxxxxxxxxxx

TAG:xxxxxxxxxxxxxxxxx

xxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxx

Waterpilot FMX21

Made in Germany,D-79689 Maulburg

p

Ex ia IICT6-T4

£

-10°C Ta 70°C

£

Ta 40°C forT6

£

Ta 70°C forT4

£

Ui 30VDC ; Ii 133mA; Pi 1W

£

£

£

II 2G

Ci= 5nF + 180pF/m ; Li= 1 µH/m

Warning!
Avoid electrostatic
charge

0...400mbar

4... 20 mA

0...600mbar

red

+

black

-

yellow-green

4…20 mA

Sensor

250002736--

10,5... 35VDC

XAxxxxxP-

XX/XXXX

TÜV 01ATEX 1685

PPS/Polyolefin

AL2O3

FEPEPDM

OPEN

CLOSE

90°

90°

Warning:
Avoid electrostatic charge in explosive atmosphere.
See instructions

Terminal Box for FMX21

Installation instructions

Installation

A0018770

1 Cable mounting screw can be ordered via the order code or as an accessory →  52
2 Terminal box can be ordered via the order code or as an accessory →  52
3 Bending radius of extension cable > 120 mm (4.72 in)
4 Mounting clamp can be ordered via the order code or as an accessory →  52
5 Extension cable, cable length →  28
6 Guide tube
7 Waterpilot FMX21
8 Additional weight can be ordered as an accessory for the FMX21 with external diameter of 22 mm (0.87 in)

and 29 mm (1.14 in)→  52

9 Protection cap

Additional installation instructions

• Sideways movement of the level probe can result in measuring errors. For this reason, install the
probe at a point free from flow and turbulence, or use a guide tube. The internal diameter of the
guide tube should be at least 1 mm (0.04 in) greater than the external diameter of the selected
FMX21.

• To avoid mechanical damage to the measuring cell, the device is equipped with a protection cap.

• The cable must end in a dry room or a suitable terminal box. The terminal box from Endress
+Hauser provides humidity and climatic protection and is suitable for installation outdoors
→  52.

• Cable length tolerance: < 5 m (16 ft): ±17.5 mm (0.69 in); > 5 m (16 ft): ±0.2 %

• If the cable is shortened, the filter at the pressure compensation tube must be reattached. Endress
+Hauser offers a cable shortening kit for this purpose →  52 (documentation SD00552P/00/
A6).

Endress+Hauser 27

Waterpilot FMX21

L

E

A

• Endress+Hauser recommends using twisted, shielded cable.

• In shipbuilding applications, measures are required to restrict the spread of fire along cable looms.

• The length of the extension cable depends on the intended level zero point. The height of the
protection cap must be taken into consideration when designing the layout of the measuring
point. The level zero point (E) corresponds to the position of the process isolating diaphragm.
Level zero point = E; tip of probe = L (see the following diagram).
For dimensions, see "Mechanical construction" section.

A0026013

Cable length

• Pay attention to the "Load"

• Cable lengths available for order
– Customer-specific in meters or feet
– Limited cable length when performing installation with freely suspended device with cable

mounting screw or mounting clamp, as well as for Ex approval: max. 300 m (984 ft).

When using the measuring device in hazardous areas, installation must comply with the
corresponding national standards and regulations and the Safety Instructions or Installation or
Control Drawings.

A Length of extension cable

Cable Option

10 m cable, can be shortened, PE 10

20 m cable, can be shortened, PE 11

..... m cable, can be shortened, PE 15

30 ft cable, can be shortened, PE 20

60 ft cable, can be shortened, PE 21

..... ft cable, can be shortened, PE 25

10 m cable, can be shortened, FEP 30

20 m cable, can be shortened, FEP 31

1)

28 Endress+Hauser

A0020556

Waterpilot FMX21

Technical data for cable

Cable Option

..... m cable, can be shortened, FEP 35

30 ft cable, can be shortened, FEP 40

60 ft cable, can be shortened, FEP 41

..... ft cable, can be shortened, FEP 45

10 m cable, can be shortened, PUR 50

20 m cable, can be shortened, PUR 51

..... m cable, can be shortened, PUR 55

30 ft cable, can be shortened, PUR 60

60 ft cable, can be shortened, PUR 61

..... ft cable, can be shortened, PUR 65

1) Ordering information: Product Configurator order code for "Probe connection"

• Minimum bending radius: 120 mm (4.72 in)

• Tensile strength: max. 950 N (213.56 lbf)

• Cable extraction force (= tensile force required to extract the cable from the probe):
– PE, FEP: typically ≥ 400 N (89.92 lbf), PUR: typically ≥ 150 N (33.72 lbf)
– when used in hazardous area: ≥ 100 N (73.75 lbf)

• UV-resistant (UV = ultraviolet)

• PE: For use in drinking water

1)

Cable marking

A0030955

• To make installation easier, Endress+Hauser marks the extension cable if a customer-specific
length has been ordered.
Ordering information: Product Configurator order code for "Service", option "IR" or "IS".

• Cable marking tolerance (distance to lower end of level probe):
Cable length < 5 m (16 ft): ±17.5 mm (0.69 in)
Cable length > 5 m (16 ft): ±0.2 %

• Material: PET, stick-on label: acrylic

• Immunity to temperature change: –30 to +100 °C (–22 to +212 °F)

NOTICE

The marking is used exclusively for installation purposes.

The mark must be thoroughly removed without trace in the case of devices with drinking water

‣

approval. The extension cable must not be damaged in the process.

Not for use of the FMX21 in hazardous areas.

Endress+Hauser 29

Cable shortening kit

Waterpilot FMX21

A0030948

The cable shortening kit is used to shorten a cable easily and professionally.

The cable shortening kit is not designed for the FMX21 with FM/CSA approval.

• Ordering information: Product Configurator order code for "Accessories enclosed", option "PW"

• Associated documentation SD00552P/00/A6.

30 Endress+Hauser

Waterpilot FMX21

Environment

Ambient temperature range FMX21 + Pt100 (optional)

• With external diameter of 22 mm (0.87 in) and 42 mm (1.65 in):
–10 to +70 °C (+14 to +158 °F) (= medium temperature)

• With external diameter of29 mm (1.14 in):
0 to +50 °C (+32 to +122 °F) (= medium temperature)

Cable

(when mounted in a fixed position)

• With PE: –30 to +70 °C (–22 to +158 °F)

• With FEP: –40 to +70 °C (–40 to +158 °F)

• With PUR: –40 to +70 °C (–40 to +158 °F)

Terminal box

–40 to +80 °C (–40 to +176 °F)

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

–40 to +85 °C (–40 to +185 °F)

Temperature head transmitter 2-wire, configured for a measuring range of
–20 to +80 °C (–4 to +176 °F). This configuration offers a temperature range of 100 K which can be
easily mapped. Please note that the Pt100 resistance temperature detector is suitable for a
temperature range of –10 to +70 °C (14 to +158 °F)

The TMT181 temperature head transmitter is not designed for use in hazardous areas incl. CSA
GP.

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

–40 to +85 °C (–40 to +185 °F)

Temperature head transmitter 2-wire, configured for a measuring range of
–20 to +80 °C (–4 to +176 °F). This configuration offers a temperature range of 100 K which can be
easily mapped. Please note that the Pt100 resistance temperature detector is suitable for a
temperature range of –10 to +70 °C (14 to +158 °F)

The TMT182 temperature head transmitter is not designed for use in hazardous areas incl. CSA
GP.

Storage temperature range FMX21 + Pt100 (optional)

–40 to +80 °C (–40 to +176 °F)

Cable

(when mounted in a fixed position)

• With PE: –30 to +70 °C (–22 to +158 °F)

• With FEP: –30 to +80 °C (–22 to +176 °F)

• With PUR: –40 to +80 °C (–40 to +176 °F)

Terminal box

–40 to +80 °C (–40 to +176 °F)

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

–40 to +100 °C (–40 to +212 °F)

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

–40 to +100 °C (–40 to +212 °F)

Degree of protection FMX21 + Pt100 (optional)

IP68, permanently hermetically sealed at 20 bar (290 psi) (~200 m H2O)

Endress+Hauser 31

Waterpilot FMX21

Terminal box (optional)

IP66, IP67

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

IP00, condensation permitted

When installed in the optional terminal boxes: IP66/IP67

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

IP00, condensation permitted

Electromagnetic compatibility (EMC)

Overvoltage protection FMX21 + Pt100 (optional)

FMX21 + Pt100 (optional)

• EMC in accordance with all relevant requirements of EN 61326 series. For details, refer to the
Declaration of Conformity.

• Maximum deviation: < 0.5 % of span.

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

Interference emission to EN 61326 Class B equipment, interference immunity to EN 61326
Appendix A (Industrial). For details, refer to the Declaration of Conformity.

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

EMC in accordance with all relevant requirements of EN 61326 series. For details, refer to the
Declaration of Conformity.

• Integrated overvoltage protection as per EN 61000-4-5 (500 V symmetrical/1000 V
asymmetrical)

• Overvoltage protection ≥ 1.0 kV, external if necessary

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

Provide overvoltage protection, externally if necessary →  10.

TMT182 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

Provide overvoltage protection, externally if necessary →  10.

32 Endress+Hauser

Waterpilot FMX21

Process

Medium temperature range FMX21 + Pt100 (optional)

• With external diameter of 22 mm (0.87 in) and 42 mm (1.65 in):
–10 to +70 °C (+14 to +158 °F)

• With external diameter of 29 mm (1.14 in):
0 to +50 °C (+32 to +122 °F)

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA Analog

–40 to +85 °C (–40 to +185 °F)

(= ambient temperature), install temperature head transmitter outside the medium.

Temperature head transmitter 2-wire, configured for a measuring range of
–20 to +80 °C (–4 to +176 °F). This configuration offers a temperature range of 100 K which can be
easily mapped. Please note that the Pt100 resistance temperature detector is suitable for a
temperature range of –10 to +70 °C (14 to +158 °F)

The TMT181 temperature head transmitter is not designed for use in hazardous areas incl. CSA
GP.

TMT181 temperature head transmitter (optional) for FMX21 4 to 20 mA HART

–40 to +85 °C (–40 to +185 °F)

(= ambient temperature), install temperature head transmitter outside the medium.

Temperature head transmitter 2-wire, configured for a measuring range of
–20 to +80 °C (–4 to +176 °F). This configuration offers a temperature range of 100 K which can be
easily mapped. Please note that the Pt100 resistance temperature detector is suitable for a
temperature range of –10 to +70 °C (14 to +158 °F)

The TMT182 temperature head transmitter is not designed for use in hazardous areas incl. CSA
GP.

Medium temperature limit FMX21 + Pt100 (optional)

With external diameter of 22 mm (0.87 in) and 42 mm (1.65 in):
–20 to +70 °C (–4 to +158 °F)

In hazardous areas incl. CSA GP, the medium temperature limit is
–10 to +70 °C (+14 to +158 °F).

With external diameter of29 mm (1.14 in): 0 to +50 °C (+32 to +122 °F)

The FMX21 may be operated in this temperature range. The specification values, such as
accuracy, may be exceeded.

Endress+Hauser 33

Waterpilot FMX21

Pressure specifications

WARNING

L

The maximum pressure for the measuring device depends on the lowest-rated element with
regard to pressure.

For pressure specifications, see the "Measuring range" section and the "Mechanical construction"

‣

section.
The measuring device must be operated only within the specified limits!

‣

The Pressure Equipment Directive (2014/68/EU) uses the abbreviation "PS". The abbreviation "PS"

‣

corresponds to the MWP (maximum working pressure) of the measuring device.
MWP (maximum working pressure): The MWP (maximum working pressure) is specified on the

‣

nameplate. This value refers to a reference temperature of +20 °C (+68 °F) and may be applied to
the device for an unlimited time. Observe temperature dependency of the MWP.
OPL (Over Pressure Limit = sensor overload limit): The test pressure corresponds to the over

‣

pressure limit of the sensor and may only be applied for a limited time period to ensure
measurement within specification and in order to avoid permanent damage. In the case of sensor
range and process connections where the over pressure limit (OPL) of the process connection is
smaller than the nominal value of the sensor, the device is set at the factory, at the very
maximum, to the OPL value of the process connection. If you want to use the entire sensor range,
select a process connection with a higher OPL value.
avoid steam hammering! Steam hammering can cause zero point drifts. Recommendation:

‣

Residue (such as condensation or drops of water) can remain on the process isolating diaphragm
after CIP cleaning and lead to local steam hammering if steam cleaning is performed again. In
practice, drying the process isolating diaphragm (e.g. by blowing) has proved to prevent steam
hammering.

34 Endress+Hauser

Waterpilot FMX21

249 (9.80)

259 (10.2)

ø22 (0.87) ±0.1

247

232

258

268

ø29≤ (1.14)

ø8 (0.31)

(9.13)

(9.72)

(10.6)

(10.2)

ø8 (0.31)

ø8 (0.31)

1

2

3 3 3

1

2

1

2

A B C

ø42 (1.65)

27 (1.06)

18 (0.71)

18 (0.71)

ø42.5 (1.67)

Dimensions of the level probe

Mechanical construction

A Product Configurator order code for "Probe tube", option "1" or "Accessories"
B Product Configurator order code for "Probe tube", option "2"
C Product Configurator order code for "Probe tube", option "5"
1 Pressure compensation tube
2 Extension cable (length, see →  28
3 Protection cap

Engineering unit mm (in)

A0018771

Endress+Hauser 35

Dimensions of the mounting

48... 52 (2.0)

≤

22 (0.87)

175 (6.89)

52 (2.05)

NPT 1½"

ø55 (2.17)

G 1½ A"

~53 (2.1)

A B

~71 (2.8)

36

~71 (2.8)

41

clamp

Dimensions of cable mounting screw

Waterpilot FMX21

A0018659

Engineering unit mm (in)

Ordering information: Product Configurator order code for "Accessories", option "PO" →  52

A G 1½" A: Product Configurator order code for "Accessories", option "PQ" →  52
B NPT 1½": Product Configurator order code for "Accessories", option "PR" →  52

Engineering unit mm (in)

Use only in unpressurized vessels.

A0018661

36 Endress+Hauser

Waterpilot FMX21

55 (2.17)

120 (4.72)

60 (2.36)0.5±

1

80 (3.15)

OPEN

CLOSE

90°

90°

ø4.5 (0.18)

50.2

(1.98)

10 (0.39)

108.2 (4.26)

~30

(1.18)

Warning:
Avoid electrostatic charge in explosive atmosphere.
See instructions

2

5

Terminal Box for FMX21

3

4

Dimensions of terminal box IP66, IP67 with filter

A0018772

1 Dummy plug M20x1.5
2 Cable gland M20x1.5
3

4 to 20 mA; terminals for 0.08 to 2.5 mm (28 to 14 AWG)0.08 to.2.5 mm

4

Ground connection; terminals for 0.08 to 2.5 mm (28 to 14 AWG)0.08 to 2.5 mm

2

2

5 GORE-TEX® filter

Engineering unit mm (in)

Terminal box IP66/IP67 with GORE-TEX® filter incl. 3 integrated terminals. The terminal box is also
suitable for the installation of a temperature head transmitter or four other terminals

Ordering information:

• Terminal box: Product Configurator order code for "Accessories enclosed", option "PS" →  52

• TMT181: Product Configurator order code for "Accessories enclosed", option "PX" →  52

• TMT182: Product Configurator order code for "Accessories enclosed", option "PT" →  52

The terminal box is not designed for the FMX21 with type of protection Ex nA in hazardous
areas. If the terminal box is used in a hazardous area, the Safety Instructions of the relevant
device must be observed, as well as the applicable regulations for explosion protection.

If the FMX21 with optional Pt100 is supplied, a terminal strip is provided with the terminal box for
the purpose of wiring the Pt100.

The 4-terminal strip is not designed for use in hazardous areas incl. CSA GP.

Endress+Hauser 37

Dimensions of the TMT181

33 (1.30)

ø44 (1.73)

21 (0.83)

3

4

5

3

6

1

2

ø5 (ø0.19)

ø7 (0.27)

33 (1.30)

ø44 (1.73)

21 (0.83)

3

4

5

3

6

1

2

ø5 (ø0.19)

ø7 (0.27)

temperature head
transmitter for
FMX21 4 to 20 mA Analog

Dimensions of the TMT182 temperature head transmitter for FMX21 4 to 20 mA HART

Waterpilot FMX21

A0018775

Engineering unit mm (in)

Ordering information:

Product Configurator order code for "Accessories enclosed", option "PX" →  52

Engineering unit mm (in)

Ordering information:

Product Configurator order code for "Accessories enclosed", option "PT" →  52

A0018775

38 Endress+Hauser

Waterpilot FMX21

>7 (0.28)1 2 3

>7 (0.28)1 2 3

Terminal box with integrated TMT181 temperature head transmitter for FMX21 4 to 20 mA Analog

A0018696

1 Terminal box
2 Terminal strip/terminals
3 TMT181 temperature head transmitter

Engineering unit mm (in)

A distance of > 7 mm (0.28 in) must be maintained between the terminal strip and the
TMT181 temperature head transmitter.

Terminal box with integrated TMT182 temperature head transmitter for FMX21 4 to 20 mA HART

A0018696

1 Terminal box
2 Terminal strip/terminals
3 TMT182 temperature head transmitter

Engineering unit mm (in)

A distance of > 7 mm (0.28 in) must be maintained between the terminal strip and the
TMT182 temperature head transmitter.

Endress+Hauser 39

Additional weight For FMX21 with external diameter of 22 mm (0.87 in) or 29 mm (1.14 in)

ø22 (0.87)

M14x1

105.8 (4.16)

110.6 (4.35)

M14x1

~33 (1.3)

~25 (0.98)

1

2

22

13

12

• Endress+Hauser offers additional weights to prevent sideways movement that results in
measuring errors, or to make it easier to lower the device in a guide tube. You can screw several
weights together. The weights are screwed directly onto the FMX21. For the FMX21 with external
diameter of 29 mm (1.14 in), a maximum of 5 weights may be screwed on. In conjunction with the
Ex nA approval, a maximum of one additional weight is permitted for the FMX21 with external
diameter of 29 mm (1.14 in).

• Order number: 52006153 Ordering information: Product Configurator order code for "Accessories
enclosed", option "PU"

Waterpilot FMX21

Engineering unit mm (in)

Testing adapter For FMX21 with external diameter of 22 mm (0.87 in) or 29 mm (1.14 in)

• Endress+Hauser offers a testing adapter to ease function-testing of the level probes.

• Observe the maximum pressure for compressed air hose and maximum overload for level probe
→  14

• Maximum pressure for the quick coupling piece provided: 10 bar (145 psi)

• Adapter material: 304 (1.4301)

• Material of quick coupling piece: anodized aluminum

• Order number 52011868
Ordering information: Product Configurator order code for "Accessories enclosed", option "PV"

1 FMX21 level probe connection
2 Compressed air hose connection, internal diameter, quick coupling piece 4 mm (0.16 in)

Engineering unit mm (in)

A0018748

A0018749

40 Endress+Hauser

Waterpilot FMX21

131 (5.16) 55.5 (2.19)

106.5 (4.19)

81.5 (3.21)

mm (in)

54 (2.13)

31 (1.22)

24 (0.94)

22 (0.87)

8.1 (0.32)

RIA15 in the field housing

A0017722

 5 Dimensions of RIA15 in field housing, engineering unit: mm (in)

The RIA15 remote display can be ordered together with the device. Product structure,
feature 620 "Accessories enclosed":

• Option R4 "Remote display RIA15 non-hazardous area, field housing"

• Option R5 "Remote display RIA15 Ex= explosion protection approval, field housing"
Alternatively available as an accessory, for details see Technical Information TI01043K and

Operating Instructions BA01170K

HART communication resistor

A0020858

 6 Dimensions of HART communication resistor, engineering unit: mm (in)

A communication resistor is required for HART communication. If this is not already present
(e.g. in the power supply RMA, RN221N, RNS221, ...), it can be ordered with the device via the
product structure, feature 620 "Accessories enclosed": option R6 "HART communication resistor
hazardous / non-hazardous area".

Alternatively available as an accessory, for details see Technical Information TI01043K and
Operating Instructions BA01170K

The HART communication resistor is specially designed for use with the RIA15 and can be attached
easily.

Endress+Hauser 41

A0020844

Waterpilot FMX21

1. Disconnect plug-in terminal block.

2. Insert the terminal block into the slot provided on the HART communication resistor module.

3. Insert the HART communication resistor in the slot in the housing.

Weight

Component part Weight

Level probe, external diameter of 22 mm (0.87 in) 344 g (12.133 oz)

Level probe, external diameter of 42 mm (1.65 in) 1 376 g (48.532 oz)

Level probe, external diameter of 29 mm (1.14 in) 394 g (13.896 oz)

Extension cable PE 52 g/m (0.035 lbs/1 ft)

PUR 60 g/m (0.040 lbs/1 ft)

FEP 108 g/m (0.072 lbs/1 ft)

Suspension clamp 170 g (5.996 oz)

Cable mounting screw G 1½" A 770 g (27.158 oz)

Cable mounting screw NPT 1½" 724 g (25.535 oz)

Terminal box 235 g (8.288 oz)

TMT181 temperature head transmitter 40 g (1.411 oz)

TMT182 temperature head transmitter 40 g (1.411 oz)

Additional weight 300 g (10.581 oz)

Testing adapter 39 g (1.376 oz)

42 Endress+Hauser

Waterpilot FMX21

B

6

7

5

1

2

3

4

A

C

6

7

6

7

1

1

2

2

4

5

5

3

3

4

1.1

1.2

Materials

A0018787

Materials in contact with process

Item number Component part Material

1 • A: Level probe, external diameter of 22 mm (0.87 in)

• B: Level probe, external diameter of 42 mm (1.65 in)

• C: Level probe, max. external diameter of 29 mm (1.14 in)

1.1 Sensor sleeve PPS (Polyphenylene sulfide)

1.2 Heat-shrink tube Polyolefin and hot melt adhesive

The heat-shrink tube around the level probe acts as insulation. It prevents electrical contact between the level probe and the



tank. Electrochemical corrosion is thus avoided.

2 Protection cap for A and C: with outer diameter 22 mm (0.87 in) and

29 mm (1.14 in) (order number: 52008999)

Protection cap for B: device with outer diameter 42 mm (1.65 in) (order number:
917755-0000)

3 Process ceramic Al2O3 (Aluminum oxide ceramic)

4 Seal EPDM

5 Extension cable insulation

Additional information

316L (1.4404/1.4435)

POM

PFA

2)

FKM Viton

Choose from:

• PE-LD (Low-density polyethylene)

• FEP (Fluorinated ethylene propylene)

• PUR (Polyurethane)

3)

1)

1) Material 316L (1.4404/1.4435) is not in contact with the process in the case of level probe C

2) Product Configurator order code for "Seal", option "H"

3) Product Configurator order code for "Seal", option "A"

Materials not in contact with process

Item number Component part Material

6 Pressure compensation tube PA

7 Heat-shrink tube Polyolefin

Endress+Hauser 43

Waterpilot FMX21

1

2

3

4

56

7

8

9

1

2

3 4

5

Terminal box (not in contact with process)

Item number Component part Material

1 Housing PC

2 Mounting screws (4 x) A2

3 Seal CR (Chloroprene rubber)

4 Dummy plug M20x1.5 PBT-GF30

5 Cable gland M20x1.5 PE-HD

6 PA6

7 PA6-GF30

8 Pressure compensation filter PA6-GF10, ePTFE

9 Pressure compensation filter, O-ring Silicone (VMQ)

A0018917

Cable mounting screw (not in contact with process)

Item number Component part Material

1 Cover for cable mounting screw 304 (1.4301)

2 Sealing ring NBR

3 Clamping sleeves PA66-GF35

4 Adapter for cable mounting screw G 1½" A, NPT 1½" 304 (1.4301)

5 Seal ® Only for G 1½" A EPDM

Suspension clamp

A0018918

Material: 316L (1.4404) and fiber-glass reinforced PA (polyamide)

44 Endress+Hauser

A0030950

Waterpilot FMX21

Additional weight

A0030954

Material: 316L (1.4435)

Testing adapter for FMX21 with outer diameter 22 mm (0.87 in) or 29 mm (1.14 in)

Adapter material: 304 (1.4301)

Material of quick coupling piece: anodized aluminum

Testing adapter for FMX21 with outer diameter 42 mm (1.65 in)

Adapter material: 304 (1.4301)

Material of quick coupling piece: anodized aluminum

A0030956

A0030957

Extension cable

PE PUR FEP

• Abrasion-resistant extension cable with strain­relief members made of high-strength PE fibers

• Shielded (aluminum)

• Insulated with polyethylene (PE), black

• Copper wires, twisted

• Pressure compensation tube with Teflon filter

• Abrasion-resistant extension cable with strain­relief members made of high-strength PE fibers

• Shielded (aluminum)

• Insulated with polyurethane (PUR), black

• Copper wires, twisted

• Pressure compensation tube with Teflon filter

• Abrasion-resistant extension cable

• Shielded with galvanized steel wire netting

• Insulated with fluorinated ethylene
propylene (FEP), black

• Copper wires, twisted

• Pressure compensation tube with Teflon
filter

Endress+Hauser 45

Operability

Waterpilot FMX21

FMX21 4 to 20 mA Analog

FMX21 4 to 20 mA HART FieldCare

No display or other operation facility is required to operate the device. However, the measured values
can be read out with optional evaluation units.

FieldCare is an Endress+Hauser asset management tool based on FDT technology. With FieldCare,
you can configure all Endress+Hauser devices as well as devices from other manufacturers that
support the FDT standard.

FieldCare supports the following functions:

• Configuration of transmitters in online and offline mode

• Loading and saving device data (upload/download)

• Documentation of the measuring point
Connection options:

• Via Commubox FXA195 and the USB interface of a computer

• Via Fieldgate FXA520
For additional information and free download of FieldCare, see → www.de.endress.com → Download

→ Text Search: FieldCare

DeviceCare

Function scope

Tool for connecting and configuring Endress+Hauser field devices.

The fastest way to configure Endress+Hauser field devices is with the dedicated "DeviceCare" tool.
Together with the device type managers (DTMs) it presents a convenient, comprehensive solution.

For details, see Innovation brochure IN01047S

RIA15

Field Xpert SFX

Field Xpert SFX is an industrial PDA with integrated 3.5" touchscreen from Endress+Hauser based on
Windows Mobile. It offers wireless communication via the optional VIATOR® Bluetooth ® modem as
a point-to-point connection to a HART device, or via WiFi and Endress+Hauser’s Fieldgate FXA520
to one or more HART devices. Field Xpert also works as a stand-alone device for asset management
applications. For details, refer to BA00060S/04/EN.

The RIA15 can be used as a local display unit and for the basic commissioning of the Waterpilot
FMX21 hydrostatic level sensor via HART.

46 Endress+Hauser

Waterpilot FMX21

Certificates and approvals

CE mark

RCM-Tick marking

Ex approvals

The device meets the legal requirements of the relevant EC directives. Endress+Hauser confirms that
the device has been successfully tested by applying the CE 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

• ATEX

• CSA C/US

• FM

• IEC

• NEPSI

• INMETRO

• The approvals apply exclusively to the Waterpilot FMX21 without Pt100 and without
TMT181/TMT182.

• Waterpilot FMX21 is only available for use in hazardous areas with the FKM Viton seal.

• All explosion protection data are given in separate documentation which is available upon
request. The Ex documentation is supplied as standard with all Ex-systems →  5.

EAC conformity

Drinking water approval

Marine approval

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.

For FMX21 with an external diameter of 22 mm (0.87 in) with EPDM seal

Designation Option

KTW LQ

NSF61 LR

ACS LS

1) Product Configurator order code for "Additional ordering information (optional)"

1)

For FMX21 with outer diameter 22 mm (0.87 in).

Designation Option

GL LE

ABS LF

BV LH

DNV LI

1) Product Configurator order code for "Additional ordering information (optional)"

1)

Endress+Hauser 47

Waterpilot FMX21

Other standards and guidelines

The applicable European guidelines and standards can be found in the relevant EU Declarations of
Conformity. The following were also applied:

DIN EN 60770 (IEC 60770):

Transmitters for use in industrial process control systems Part 1: Methods for performance
evaluation

Methods for evaluating the performance of transmitters for control and regulation in industrial
process control systems.

DIN 16086:

Electrical pressure measuring instruments, pressure sensors, pressure transmitters, pressure
measuring instruments, concepts, specifications on data sheets

Procedure for writing specifications in data sheets for electrical pressure measuring instruments,
pressure sensors and pressure transmitters.

EN 61326:

Electrical equipment for measurement, control and laboratory use – EMC requirements

EN 61010-1 (IEC 61010-1):

Protection Measures for Electrical Equipment for Measurement, Control, Regulation and Laboratory
Procedures

EN 60529:

Degrees of protection provided by enclosures (IP code)

Calibration

Pressure Equipment Directive 2014/68/EU (PED)

Designation Option

Factory calibration certificate, 5-point F1

1) Product Configurator order code for "Calibration"

1)

Pressure equipment with allowable pressure ≤ 200 bar (2 900 psi)

Pressure equipment (with a maximum allowable pressure PS ≤ 200 bar (2 900 psi)) can be classified
as pressure accessories in accordance with Pressure Equipment Directive 2014/68/EU. If the
maximum allowable pressure is ≤ 200 bar (2 900 psi) and the pressurized volume of the pressure
equipment is ≤ 0.1 l, the pressure equipment is subject to the Pressure Equipment Directive (cf.
Pressure Equipment Directive 2014/68/EU, Article 4, point 3). The Pressure Equipment Directive
only requires that the pressure equipment shall be designed and manufactured in accordance with
the "sound engineering practice of a Member State".

Reasons:

• Pressure Equipment Directive (PED) 2014/68/EU Article 4, point 3

• Pressure equipment directive 2014/68/EU, Commission's Working Group "Pressure", Guideline
A-05 + A-06

Note:

A partial examination shall be performed for pressure instruments that are part of safety equipment
for the protection of a pipe or vessel from exceeding allowable limits (safety accessory in accordance
with Pressure Equipment Directive 2014/68/EU, Article 2, point 4).

Calibration unit

Designation Option

Sensor range; % A

Sensor range; mbar/bar B

Sensor range; kPa/MPa C

Sensor range; mm/m H2O D

Sensor range; in H2O/ft H2O E

1)

48 Endress+Hauser

Waterpilot FMX21

1

3

4

2

Service

Downloading the Declaration of Conformity

Designation Option

Sensor range; psi F

Customized pressure; see additional specification J

Customized level; see additional specification K

1) Product Configurator order code for "Calibration; unit"

Designation Option

Configured min alarm current IA

Adjusted HART Burst Mode PV IB

Adjusted density compensation IC

... m cable marking>installation IR

... ft cable marking>installation IS

Special version I9

1) Product Configurator order code for "Service""

1)

http://www.endress.com/en/download

1)

A0031778

1. Select "Approvals & Certificates"

2. Select "Manufact. Declaration"

3. Enter the required product code

4. Click "Search"

The available downloads are displayed.

Endress+Hauser 49

Waterpilot FMX21

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 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 from the Endress+Hauser Online Shop

Scope of delivery

• Measuring device

• Optional accessories

• Brief Operating Instructions

• Certificates

Configuration data sheet Level

The following configuration data sheet must be completed and included with the order if option "K:
customized level" has been selected for order code "090: Calibration; unit" in the product structure.

Pressure unit Output unit (scaled unit)

Mass Lengths Volume Volume Percent

 mbar  mmH2O  mmHg  Pa  kg  m  l  gal  %

 bar  mH2O  kPa  t  dm  hl  Igal

 ftH2O  MPa  lb  cm

 psi  inH2O  kgf/cm

Empty calibration [a]:
Low pressure value (empty) ___________

[pressure
engineering
unit]

2

 mm  m

 ft  in

 inch

Empty calibration [a]:
Low pressure value (empty) ___________

[scaled unit]

 ft

3

3

3

Full calibration [b]:
High pressure value (full) ___________

[pressure engineering unit] [scaled unit]

Damping

Damping: ___________ sec

Full calibration [b]:
High measured value (full) ___________

50 Endress+Hauser

Waterpilot FMX21

Pressure

The following configuration data sheet must be completed and included with the order if option "J:
customized pressure" has been selected for order code "090: Calibration; unit" in the product
structure.

Pressure unit

 mbar  mmH2O  mmHg  Pa

 bar  mH2O  kPa

 ftH2O  MPa

 psi  inH2O  kgf/cm

Calibration range / Output

Lower-range value (LRV): __________ [pressure

Upper-range value (URV): __________ [pressure

2

engineering
unit]

engineering
unit]

Damping

Damping: ___________ sec

Endress+Hauser 51

Waterpilot FMX21

3

4

5

3

6

1

2

3

4

5

3

6

1

2

A B

Accessories

CAUTION

L

Observe the additional information in the individual sections!

For additional information, see the sections "Mechanical construction" →  35 , "Environment",

‣

→  31, "Process" →  33 and "Installation" →  27.

Designation Diagram Description Order number / ordering

information

Suspension clamp

Terminal box

4-terminal strip/terminals

For easy installation of the FMX21,
Endress+Hauser offers a mounting
clamp .

A0030950

Terminal box for terminal strip,
temperature head transmitter and
Pt100.

A0030967

4-terminal strip for wiring 52008938

• 52006151

• Product Configurator order
code for "Accessory enclosed",
option "PO"

• 52006152

• Product Configurator order
code for "Accessories enclosed",
option "PS"

TMT181 temperature head
transmitter for
FMX21 4 to 20 mA Analog

TMT182 temperature head
transmitter for
FMX21 4 to 20 mA HART

Cable mounting screws

Additional weight for FMX21 with
outer diameter 22 mm (0.87 in) or
29 mm (1.14 in)

A G 1½" A
B NPT 1½"

A0030951

PC-programmable (PCP)
temperature head transmitter for
the conversion of various input
signals

A0030952

PC-programmable (PCP)
temperature head transmitter for
the conversion of various input
signals

A0030952

Endress+Hauser offers a cable
mounting screw for easy FMX21
mounting and to seal the
measuring aperture.

A0030953

Endress+Hauser offers additional
weights to prevent sideways
movement that results in
measuring errors, or to make it
easier to lower the device in a
guide tube.

• 52008794

• Product Configurator order
code for "Accessories enclosed",
option "PX"

• 51001023

• Product Configurator order
code for "Accessories enclosed",
option "PT"

• G 1½" A
– 52008264
– Product Configurator order

code for "Accessories
enclosed", option "PQ"

• NPT 1½"
– 52009311
– Product Configurator order

code for "Accessories
enclosed", option "PR"

• 52006153

• Product Configurator order
code for "Accessories enclosed",
option "PU"

A0030954

52 Endress+Hauser

Waterpilot FMX21

Designation Diagram Description Order number / ordering

information

Cable shortening kit

Testing adapter for FMX21 with
outer diameter 22 mm (0.87 in) or
29 mm (1.14 in)

Testing adapter for FMX21 with
outer diameter 42 mm (1.65 in)

The cable shortening kit is used to
shorten a cable easily and
professionally.

A0030948

Endress+Hauser offers a testing
adapter to ease function-testing of
the level probes.

A0030956

Endress+Hauser offers a testing
adapter to ease function-testing of
the level probes.

• Observe the maximum pressure
for compressed air hose and
maximum overload for level
probe

• Maximum pressure for the quick
coupling piece provided:
10 bar (145 psi)

• 71222671

• Product Configurator order
code for "Accessories enclosed",
option "PW"

• 52011868

• Product Configurator order
code for "Accessories enclosed",
option "PV"

71110310

RIA15 in the field housing

HART communication resistor

Service-specific accessories

A0030957

Remote display RIA15 non­hazardous

Remote display RIA15 hazardous Product structure, feature 620

A0036164

HART communication resistor,
hazardous / non-hazardous area,
for use with RIA15

A0036165

Accessories Description

DeviceCare SFE100 Configuration tool for HART, PROFIBUS and FOUNDATION Fieldbus field devices

Technical Information TI01134S



DeviceCare is available for download at www.software-products.endress.com.



You need to register in the Endress+Hauser software portal to download the
application.

FieldCare SFE500 FDT-based plant asset management tool

FieldCare can configure all smart field units in your plant and helps you manage
them. By using the status information, FieldCare is also a simple but effective way
of checking the status and condition of the field devices.

Technical Information TI00028S



Product structure, feature 620
"Accessory enclosed", option R4
"Remote display RIA15 non­hazardous area, field housing"

"Accessory enclosed", option R5
"Remote display RIA15 Ex=
explosion protection approval,
field housing"

Product structure, feature 620
"Accessory enclosed", option R6
"HART communication resistor
hazardous / non-hazardous area"

Endress+Hauser 53

Waterpilot FMX21

Supplementary documentation

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

Field of Activities

Technical Information

Operating Instructions

Brief Operating Instructions

Safety Instructions (XA)

• Pressure measurement: FA00004P/00/EN

• Recording technology: FA00014R/09/EN

• System components: FA00016K/09/EN

• Deltapilot M: TI00437P/00/EN

• Temperature head transmitter iTEMP TMT181: TI00070R/09/EN

• Temperature head transmitter iTEMP HART TMT182: TI00078R/09/EN

• RIA15: TI01043K/09/EN

• Waterpilot FMX21 4 to 20 mA Analog: BA01605P/00/EN

• Waterpilot FMX21 4 to 20 mA HART: BA00380P/00/EN

• RIA15: BA01170K/09/EN

• Cable shortening kit: SD00552P/00/A6

• Field Xpert: BA01211S/04/EN

• Waterpilot FMX21 4 to 20 mA Analog: KA01244P/00/EN - Brief Operating Instructions for the
device

• Waterpilot FMX21 4 to 20 mA HART: KA01189P/00/EN - Brief Operating Instructions for the
device

Depending on the approval, the following Safety Instructions (XA) are supplied with the device. They
are an integral part of the Operating Instructions.

Directive Type of protection Category Documentation Option

ATEX Ex ia IIC II 2 G XA00454P BD

ATEX Ex nA IIC II 3 G XA00485P BE

IECEx Ex ia IIC n/a XA00455P IC

CSA C/US Ex ia IIC n/a ZD00232P

(960008976)

FM AEx ia IIC n/a ZD00231P

(960008975)

NEPSI Ex ia IIC n/a XA00456P NA

INMETRO Ex ia IIC n/a XA01066P MA

1)

CE

FE

1) Product Configurator order code for "Approval"

The nameplate indicates the Safety Instructions (XA) that are relevant to the device.

Drinking water approval

• SD00289P/00/A3 (NSF)

• SD00319P/00/A3 (KTW)

• SD00320P/00/A3 (ACS)

Registered trademarks

GORE-TEXâ

TEFLONâ

HARTâ

54 Endress+Hauser

Trademark of W.L. Gore & Associates, Inc., USA.

Trademark of E.I. Du Pont de Nemours & Co., Wilmington, USA.

Registered trademark of the FieldComm Group, Austin, USA

Waterpilot FMX21

FieldCareâ

DeviceCareâ

iTEMPâ

Trademark of Endress+Hauser Process Solutions AG.

Trademark of Endress+Hauser Process Solutions AG.

Trademark of Endress+Hauser Wetzer GmbH + Co. KG, Nesselwang, D..

Endress+Hauser 55

*71397581*

71397581

www.addresses.endress.com