Model 311-M351 | Submersible Lift Station Sludge Level Transmitter

Range: o to 5 thru 0 to 500 PSI (0 to 10 FT thru 0 to 1,153 FT WC) (o to 3 thru 0 to 335 meters WC)
Certification: Optional FM/CSA Hazardous Approvals
Warranty: Product Warranty

• Optional hazardous approvals • External lightning / surge protection package available • 4-20 mA or 0 to 5 Vdc outputs • Optional temperature output


The Submersible Lift Station Sludge Level Transmitter Model 311-M351 from GP:50 NY Ltd features an all-stainless steel construction for high-reliability within challenging wastewater lift station monitoring applications. Its corrosion-resistant design is submersible to 1100 feet (335 meters) WC. It is available in standard ranges from 0-10 thru 0-1100 feet WC (0-3 thru 0-335 meters WC), with custom ranges available upon request. Units are available with choice of 4-20 mA or 0-5 Vdc output, as well as an optional temperature output. The submersible level transmitter further incorporates a 3-inch diameter clog-resistant sensing diaphragm and corrosion-resistant protective baffle plate, both of which eliminate process clogging.

These features also facilitate unrestricted high-accuracy level depth measurements within heavy sludge or foam conditions. The baffle plate also reduces risks of effluent sensor damage, particularly in lift station applications where particulate matter is present. Integral lightning and surge protection is offered as standard. A supplemental DIN rail mountable lightning and surge protection package is optional. When combined with the unit’s integral protective features, the additional package can help to significantly extend the service life of the Model 311-M351 Submersible Lift Station Sludge Level Transmitter within outdoor environments. Optional FM and CSA approvals are also available for hazardous location use.

This combination of durability and accuracy, along with over 25 years of proven field service, have helped make the GP:50 Model 311-M351 an industry gold standard for water and wastewater level monitoring.

Typical applications for the GP:50 Model 311-M351 Submersible Lift Station Sludge Level Transmitter include submersible pump lift station level monitoring, process sumps, lift stations, wet wells, water tanks and reservoirs, ponds, process sludge (including heavy sludge) and municipal wastewater environments.


Additional information



Pressure Ranges