E+H Waterpilot FMX21 Level Transmitter

Three different versions of pressure sensor for drinking water, wastewater and sewage, and salt water.

Starting at $1,058.71
Effective August 22nd, 2025, Endress+Hauser has added a 8.4% surcharge to this product. The surcharge will appear as a separate line item on the order.

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Manufactured
Includes
Availability
Product Manual Product Specs

Features

  • Simultaneous measurement of level and temperature
  • Ceramic sensor (99.9% Al2O3)
  • 4 to 20mA with superimposed HART 6.0 output
  • 14 to 158°F (–10 to 70°C) temperature
  • 0 to 20bar / 200mH2O (0 to 300psi / 600ftH2O) measuring range
  • ±0.2% accuracy
  • Extended 5-year warranty, please contact an engineer for details

The E+H Waterpilot FMX21 level transmitter features a capacitive, oil-free ceramic measuring cell, and is typically used in process and environmental applications for hydrostatic level measurement. With HART output, the measuring ranges can be freely adjusted, and a density-compensated level measurement can be activated. The FMX21 is certified for drinking water and offers integrated temperature measurement. Versions for applications in wastewaters and sludges or usage in salt water are also available.

This product can be used in the following applications:

Manufacturer Stock

This stock is typically available to ship in 2 - 4 working days

Part Number Approval Output Sensor Range Calibration and Unit Cable Length Options Price Available
FMX21-AA211QGF25H [600 FT]
Show Full Configuration
Non-hazardous area
4-20mA HART
667ft H2O, 300 PSIG (20 bar, 200 meters H2O)
Sensor range / psi
Custom length in feet
 $2,664.68 6 in stock
FMX21-FE211CGE21A
Show Full Configuration
FM IS Cl.I Div.1 Gr.A-D, AEx ia, zone 1
4-20mA HART
3ft H2O, 1.5 PSIG (100 mbar, 1 meter H2O)
Sensor range / inH2O/ftH2O
60 feet
 $1,356.16 6 in stock
FMX21-AA211QGF25H [500 FT]
Show Full Configuration
Non-hazardous area
4-20mA HART
667ft H2O, 300 PSIG (20 bar, 200 meters H2O)
Sensor range / psi
Custom length in feet
 $2,421.68 4 in stock
FMX21-CD211GGE20A
Show Full Configuration
CSA General Purpose
4-20mA HART
20ft H2O, 9 PSIG (600 mbar, 6 meters H2O)
Sensor range / inH2O/ftH2O
30 feet
 $1,261.61 4 in stock
FMX21-CE221KGE25APRR5 [100 FT]
Show Full Configuration
CSA C/US IS Cl.I Div.1 Gr.A-D, Ex ia, zone 1
4-20mA HART
67ft H2O, 30 PSIG (2 bar, 20 meters H2O)
Sensor range / inH2O/ftH2O
Custom length in feet
 $2,228.48 4 in stock
FMX21-AA221CGE10A
Show Full Configuration
Non-hazardous area
4-20mA HART
3ft H2O, 1.5 PSIG (100 mbar, 1 meter H2O)
Sensor range / inH2O/ftH2O
10 meters
 $1,261.61 3 in stock
FMX21-CD111GGF20H
Show Full Configuration
CSA General Purpose
4-20mA
20ft H2O, 9 PSIG (600 mbar, 6 meters H2O)
Sensor range / psi
30 feet
 $1,058.71 3 in stock
FMX21-FE121KGE21APOPS
Show Full Configuration
FM IS Cl.I Div.1 Gr.A-D, AEx ia, zone 1
4-20mA
67ft H2O, 30 PSIG (2 bar, 20 meters H2O)
Sensor range / inH2O/ftH2O
60 feet
 $1,287.53 3 in stock
FMX21-FE211PGF25APOPS [3 FT]
Show Full Configuration
FM IS Cl.I Div.1 Gr.A-D, AEx ia, zone 1
4-20mA HART
333ft H2O, 150 PSIG (10 bar, 100 meters H2O)
Sensor range / psi
Custom length in feet
 $1,387.89 3 in stock
FMX21-FE221HGE25APO [25 FT]
Show Full Configuration
FM IS Cl.I Div.1 Gr.A-D, AEx ia, zone 1
4-20mA HART
33ft H2O, 15 PSIG (1 bar, 10 meters H2O)
Sensor range / inH2O/ftH2O
Custom length in feet
 $1,362.01 3 in stock
FMX21-AA111HGE25APUPV [25 FT]
Show Full Configuration
Non-hazardous area
4-20mA
33ft H2O, 15 PSIG (1 bar, 10 meters H2O)
Sensor range / inH2O/ftH2O
Custom length in feet
 $1,226.23 2 in stock
FMX21-AA121GGE21ANBPOPSPX
Show Full Configuration
Non-hazardous area
4-20mA
20ft H2O, 9 PSIG (600 mbar, 6 meters H2O)
Sensor range / inH2O/ftH2O
60 feet
 $1,652.11 2 in stock
FMX21-AA121HGF20A
Show Full Configuration
Non-hazardous area
4-20mA
33ft H2O, 15 PSIG (1 bar, 10 meters H2O)
Sensor range / psi
30 feet
 $1,058.71 2 in stock
FMX21-AA211HGE20A
Show Full Configuration
Non-hazardous area
4-20mA HART
33ft H2O, 15 PSIG (1 bar, 10 meters H2O)
Sensor range / inH2O/ftH2O
30 feet
 $1,261.61 2 in stock
FMX21-AA211PGE25APO [25 FT]
Show Full Configuration
Non-hazardous area
4-20mA HART
333ft H2O, 150 PSIG (10 bar, 100 meters H2O)
Sensor range / inH2O/ftH2O
Custom length in feet
 $1,322.36 2 in stock
FMX21-AA251KGD11APOPS
Show Full Configuration
Non-hazardous area
4-20mA HART
67ft H2O, 30 PSIG (2 bar, 20 meters H2O)
Sensor range / mm/mH2O
20 meters
 $1,630.78 2 in stock
FMX21-CE221GGE20APO
Show Full Configuration
CSA C/US IS Cl.I Div.1 Gr.A-D, Ex ia, zone 1
4-20mA HART
20ft H2O, 9 PSIG (600 mbar, 6 meters H2O)
Sensor range / inH2O/ftH2O
30 feet
 $1,356.19 2 in stock
FMX21-FE221CGE21APO
Show Full Configuration
FM IS Cl.I Div.1 Gr.A-D, AEx ia, zone 1
4-20mA HART
3ft H2O, 1.5 PSIG (100 mbar, 1 meter H2O)
Sensor range / inH2O/ftH2O
60 feet
 $1,411.09 2 in stock
FMX21-FE221GGE25APO [20 FT]
Show Full Configuration
FM IS Cl.I Div.1 Gr.A-D, AEx ia, zone 1
4-20mA HART
20ft H2O, 9 PSIG (600 mbar, 6 meters H2O)
Sensor range / inH2O/ftH2O
Custom length in feet
 $1,349.86 2 in stock
FMX21-FE221GGE25APO [25 FT]
Show Full Configuration
FM IS Cl.I Div.1 Gr.A-D, AEx ia, zone 1
4-20mA HART
20ft H2O, 9 PSIG (600 mbar, 6 meters H2O)
Sensor range / inH2O/ftH2O
Custom length in feet
 $1,362.01 2 in stock
FMX21-FE221HGE25AF1POPS [100 FT]
Show Full Configuration
FM IS Cl.I Div.1 Gr.A-D, AEx ia, zone 1
4-20mA HART
33ft H2O, 15 PSIG (1 bar, 10 meters H2O)
Sensor range / inH2O/ftH2O
Custom length in feet
 $1,797.47 2 in stock
FMX21-AA111CGB10APO
Show Full Configuration
Non-hazardous area
4-20mA
3ft H2O, 1.5 PSIG (100 mbar, 1 meter H2O)
Sensor range / mbar/bar
10 meters
 $1,113.64 1 in stock
FMX21-AA111HGF20H
Show Full Configuration
Non-hazardous area
4-20mA
33ft H2O, 15 PSIG (1 bar, 10 meters H2O)
Sensor range / psi
30 feet
 $1,058.71 1 in stock
FMX21-AA111KGE25A [40 FT]
Show Full Configuration
Non-hazardous area
4-20mA
67ft H2O, 30 PSIG (2 bar, 20 meters H2O)
Sensor range / inH2O/ftH2O
Custom length in feet
 $1,100.98 1 in stock
FMX21-AA111MDF40A
Show Full Configuration
Non-hazardous area
4-20mA
133ft H2O, 60 PSIG (4 bar, 40 meters H2O)
Sensor range / psi
30 feet
 $1,501.05 1 in stock
FMX21-AA111PGF11HLR
Show Full Configuration
Non-hazardous area
4-20mA
333ft H2O, 150 PSIG (10 bar, 100 meters H2O)
Sensor range / psi
20 meters
 $1,153.26 1 in stock
FMX21-AA111QGF25HPOPS [400 FT]
Show Full Configuration
Non-hazardous area
4-20mA
667ft H2O, 300 PSIG (20 bar, 200 meters H2O)
Sensor range / psi
Custom length in feet
 $2,110.05 1 in stock
FMX21-AA121GGJ25A [25 FT]
Show Full Configuration
Non-hazardous area
4-20mA
20ft H2O, 9 PSIG (600 mbar, 6 meters H2O)
Customized pressure / see additional spec.
Custom length in feet
 $1,136.22 1 in stock
FMX21-AA121KGE20APOPRPS
Show Full Configuration
Non-hazardous area
4-20mA
67ft H2O, 30 PSIG (2 bar, 20 meters H2O)
Sensor range / inH2O/ftH2O
30 feet
 $1,284.49 1 in stock
FMX21-AA121QGF25A [50 FT]
Show Full Configuration
Non-hazardous area
4-20mA
667ft H2O, 300 PSIG (20 bar, 200 meters H2O)
Sensor range / psi
Custom length in feet
 $1,125.28 1 in stock
FMX21-AA151GGE11H
Show Full Configuration
Non-hazardous area
4-20mA
20ft H2O, 9 PSIG (600 mbar, 6 meters H2O)
Sensor range / inH2O/ftH2O
20 meters
 $1,293.61 1 in stock
FMX21-AA211MDF25HF1 [150 FT]
Show Full Configuration
Non-hazardous area
4-20mA HART
133ft H2O, 60 PSIG (4 bar, 40 meters H2O)
Sensor range / psi
Custom length in feet
 $1,931.14 1 in stock
FMX21-AA211MGF25HF1PO [15 FT]
Show Full Configuration
Non-hazardous area
4-20mA HART
133ft H2O, 60 PSIG (4 bar, 40 meters H2O)
Sensor range / psi
Custom length in feet
 $1,471.93 1 in stock
FMX21-AA211PGE25APOPS [120 FT]
Show Full Configuration
Non-hazardous area
4-20mA HART
333ft H2O, 150 PSIG (10 bar, 100 meters H2O)
Sensor range / inH2O/ftH2O
Custom length in feet
 $1,632.55 1 in stock
FMX21-AA211QGF25H [700 FT]
Show Full Configuration
Non-hazardous area
4-20mA HART
667ft H2O, 300 PSIG (20 bar, 200 meters H2O)
Sensor range / psi
Custom length in feet
 $2,907.68 1 in stock
FMX21-AA221QGA15ANB [200 M]
Show Full Configuration
Non-hazardous area
4-20mA HART
667ft H2O, 300 PSIG (20 bar, 200 meters H2O)
Sensor range / %
Custom length in meters
 $2,793.78 1 in stock
FMX21-CD111KGF25A [80 FT]
Show Full Configuration
CSA General Purpose
4-20mA
67ft H2O, 30 PSIG (2 bar, 20 meters H2O)
Sensor range / psi
Custom length in feet
 $1,198.18 1 in stock
FMX21-CD211HGE21A
Show Full Configuration
CSA General Purpose
4-20mA HART
33ft H2O, 15 PSIG (1 bar, 10 meters H2O)
Sensor range / inH2O/ftH2O
60 feet
 $1,316.51 1 in stock
FMX21-CD211HGE21H
Show Full Configuration
CSA General Purpose
4-20mA HART
33ft H2O, 15 PSIG (1 bar, 10 meters H2O)
Sensor range / inH2O/ftH2O
60 feet
 $1,316.51 1 in stock
FMX21-CD211PGE25HLRPOPS [250 FT]
Show Full Configuration
CSA General Purpose
4-20mA HART
333ft H2O, 150 PSIG (10 bar, 100 meters H2O)
Sensor range / inH2O/ftH2O
Custom length in feet
 $1,988.10 1 in stock
FMX21-FE221HGE25AF1PO [100 FT]
Show Full Configuration
FM IS Cl.I Div.1 Gr.A-D, AEx ia, zone 1
4-20mA HART
33ft H2O, 15 PSIG (1 bar, 10 meters H2O)
Sensor range / inH2O/ftH2O
Custom length in feet
 $1,718.13 1 in stock
FMX21-FE221PGF41APO
Show Full Configuration
FM IS Cl.I Div.1 Gr.A-D, AEx ia, zone 1
4-20mA HART
333ft H2O, 150 PSIG (10 bar, 100 meters H2O)
Sensor range / psi
60 feet
 $1,934.29 1 in stock

Additional Part Numbers

These part numbers are available as old stock, but we have limited information about the configuration. Please call for more information.

Part Number Price Available
FMX21-AA251HGD55APS 8.00m Call for information 1 Call to order
FMX21-AA211QGE99HLR Call for information 1 Call to order

Interested in Other Part Numbers?

Other part numbers are available to order but are not currently in stock. Current availability for non-stock parts is "Usually ships in 3-4 weeks". Click here to select options