201 Pump Controls Series - Single-Channel Seal-Leak Detector

Littelfuse Pump Controls and Liquid Level Controls
Roll Over to Zoom
The model 201-100-SLD is an 8-pin plug-in style seal-leak detector to sense seal failures on submersible pumps. A microcontroller-based relay that monitors the shaft seal of a submersible pump motor. A resistive probe is installed in the seal cavity. If water leaks into the pump, the resistance measured by the probe decreases. When the resistance drops below the sensitivity setpoint, the unit will trip and the relay contacts will change state. The unit will automatically reset when a fault is cleared.

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Termination TypeMounting MethodDimensionsWeight (lbs/g)
201-100-SLD110 to 120VAC nominalSPDTTorque (OT08-PC octal socket): 6 in-lbs; Wire: Stranded or solid 10-22AWGDIN rail or surface mount (plug-in to OT08-PC socket)1.75 in H x 2.38 in W x 4.13 in D (with socket) (44.5 x 60.3 x 104.8 mm)0.7 lb. (11.2 oz. 317.5 g)
To request product environmental information, please complete the Product Environmental Information Request Form.