The 460-15-100-SLD is a seal leak detector to sense seal failures on submersible pumps. A microcontroller based relay 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 set point, the unit will trip and the relay contacts will change state. Output relay logic can be reversed by removing an external jumper. The unit will automatically reset when a fault is cleared.

Littelfuse® Seal Leak Detector, 1-Channel, 110 to 120 V AC, 2 W, LED Indicator, Screw, Detects: Seal Failures on Submersible Pump, 2.35 in Length, 2.08 in Width, 3-1/2 in Height, Polycarbonate

• Unique probe protection logic
• Probes are protected from scale build up through pulsed DC signal between the probes
• Invertible relay logic allows flexibility to be used in pump up and pump down applications
• LED status indicators provides visual indication of the relay status
• Two relay contacts control independent loads on different circuits

• Specification Sheet https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Littelfuse_460-15-100-SLD_Specification_Sheet.pdf
• Owners/User Manual https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Littelfuse_L60030C-2PQ_User_Manual.pdf