Specs at a glance
-
Accuracy
0.2%
0.1% (optional) -
Process temperature
-10°C...70°C
(14°F...158°F)
Diameter 29 mm (1.14"): 0°C...50°C
(32°F...122°F) -
Pressure measuring range
100 mbar...20 bar
(1.5 psi...300 psi) -
Main wetted parts
Diameter 22 mm and 42 mm: Seal, 316L, Ceramic
Diameter 29 mm: Seal, PPS, Polyolefin, Ceramic
Extension cable: PE, PUR, FEP -
Max. measurement distance
200 m H2O
(656 ft H2O) -
Measuring cell
100mbar...20bar
(1.5psi...300psi)
Field of application
The Waterpilot FMX21 transmitter with capacitive, oil-free ceramic measuring cell is typically used in the 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. It 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.
Three different versions for drinking water, wastewater and sewage, saltwater.
Process connections: Suspension clamp, cable gland
Temperature: –10 to +70°C (14 to 158°F)
Measuring range: 0 to 20bar / 200m H20 (0 to 300psi / 600ft H2O)
Accuracy: ±0.2%, "Platinum" ±0.1%
International explosion protection certificates, marine approvals, drinking water approval
Benefits
Robust overload-resistant high purity ceramic sensor (99.9% Al2O3)
Flexible scaling of 4 to 20mA with superimposed HART 6.0 output
Highest level accuracy using temperature compensated density correction
Simultaneous measurement of level and temperature with optionally integrated Pt100 temperature sensor
Extensive range of accessories provides complete measuring point solutions
-
Climate proofed sensor thanks to completely potted electronics and 2-filter pressure compensation system
-
Small outer diameter of 22mm (0.87") version suitable for drinking water applications and for use in bore holes and wells with small diameters
Videos
Fundamental selection
-
Simple products
- Easy to select, install and operate
Technical excellence
Simplicity
-
Standard products
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
-
Specialized products
- Designed for demanding applications
Technical excellence
Simplicity
Variable
| FLEX selections | Technical excellence | Simplicity |
|---|---|---|
Fundamental selection Meet your basic measurement needs |
Technical excellence
|
Simplicity
|
Lean selection Handle your core processes easily |
Technical excellence
|
Simplicity
|
Extended selection Optimize your processes with innovative technologies |
Technical excellence
|
Simplicity
|
Xpert selection Master your most challenging applications |
Technical excellence
|
Simplicity
Variable |
Loading alternative products
Predecessor
Success stories
14 documents
-
-
Operating Instruction (BA)
BA Waterpilot FMX21
静压液位测量
EN 28/11/2022Language:
Chinese
Version:
28/11/2022
File size:
2.2 MB
File name:
BA01605PZH_0222-00.pdf
-
-
-
Ex Safety Instruction (XA)
Waterpilot FMX21
II 3 G Ex ec IIC Gc
EN 25/10/2021Language:
Dutch
Version:
25/10/2021
File size:
382.2 KB
File name:
XA00485PNL_1621-00.pdf
-
-
-
Special Documentation (SD)
Mechanical accessories for pressure measuring devices Pressure measurement Special Documentation
Mechanical accessories for pressure measuring devices
Language:
English
Version:
10/07/2019
File size:
2.6 MB
File name:
SD01553PEN_0419.pdf
-
-
-
Fields of Activities (FA)
Level measurement
Product overview for applications in liquids and bulk solids
Language:
English
Version:
06/03/2026
File size:
35.8 MB
File name:
FA00001F00EN2726.pdf
-
-
-
Fields of Activities (FA)
レベル計 総合カタログ
液体および粉体アプリケーション向けレベル計・レベルスイッチ
Language:
Japanese
Version:
23/12/2025
File size:
33.9 MB
File name:
FA00001FJA_2625_Level meter comprehensive catalog.pdf
-
-
-
Fields of Activities (FA)
圧力測定
プロセス圧力、差圧、レベル、流量測定用の高性能伝送器
Language:
Japanese
Version:
05/07/2023
File size:
6 MB
File name:
FA00004PJA_2321.pdf
-
-
-
Fields of Activities (FA)
Füllstandsmesstechnik
Produktübersicht für Anwendungen in Flüssigkeiten und Schüttgütern
Language:
German
Version:
14/10/2022
File size:
10.6 MB
File name:
FA00001F00DE2522.pdf
-
-
-
Fields of Activities (FA)
Pressure measurement
Powerful instruments for process pressure, differential pressure, level
and flowLanguage:
English
Version:
23/02/2026
File size:
30.7 MB
File name:
FA00004P00EN2526.pdf
-
-
-
Competence Brochure (CP)
Selection Guide, Auswahlhilfe. Kontinuierliche Füllstandmessung in Flüssigkeiten und Schüttgütern
Auswahl- und Projektierungshilfe für die Prozessindustrie
Language:
German
Version:
09/03/2026
File size:
21.1 MB
File name:
CP00023F00DE2126.pdf
-
-
-
Competence Brochure (CP)
Pressure instrumentation: Selection guide for pressure, differential pressure, level and flow measurement
Pressure instrumentation: Selection guide for pressure, differential pressure, level and flow measurement
Language:
English
Version:
09/03/2026
File size:
9.9 MB
File name:
CP00022P00EN2226.pdf
-
5 products & bundles
5 products
Often bought together
Accessories
Related products
