Waterpilot FMX21 – hydrostatic level probe | Endress Hauser E+H

Reliable hydrostatic level measurement for drinking water, wastewater and saltwater applications

Automation Components

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)

Field of application

Waterpilot FMX21 is a robust hydrostatic level probe featuring an oil‑free capacitive ceramic measuring cell for stable and accurate measurement results. Freely adjustable measuring ranges can be configured via HART, enabling flexible adaptation to different process requirements in drinking water, wastewater and saltwater applications. An optionally integrated temperature sensor enables simultaneous measurement of level and temperature.

Benefits

Robust design with an oil-free capacitive ceramic measuring cell for long‑term operation

Easy system integration and flexible parameterization via HART communication

Geometry‑independent hydrostatic level measurement, ideal for deep, narrow boreholes and wells

Compliance with international explosion protection certificates, marine approvals and drinking water certifications

Optionally integrated temperature sensor enables temperature‑compensated density correction for high measurement accuracy

Spare parts & accessories

	Description	Category	Drawing No.	Order Code
1	Pressure compensation Waterpilot	further parts		52005578
2	Protection press.sensor Waterpilot, 5pc.	further parts		52008999
3	Protection cover, PFA	further parts		917755-0000
4	Mounting clamp FMX21, FMX11, 316L			52006151
5	Additional weight FMX21, FMX167, 316L			52006153
6	Cable-mounting-screw G1-1/2, 304			52008264
7	Binding posts terminal box FMX21, FMX167			52008938
8	Cable-mounting-screw NPT1-1/2, 304			52009311
9	Test adapter FMX21, FMX167			52011868
10	Shorten.kit extension cable FMX21,FMX167			71222671
11	Terminal box 120x80x55, PC			52006152
12	HART communication resistor Ex/non Ex			71325087
13	Transmitter 2-wire TMT71 -20/+80oC			71593573
14	Transmitter 2-wire TMT72 HART -20/+80oC			71593576