460-15-100-SLD Series – Single-Channel Seal-Leak Detector Series - Littelfuse 460-15-100-SLD Seal-Leak Detectors Provide Superior Protection

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The 460-15-100-SLD series is a single-channel, seal-leak detector that senses 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 setpoint, 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. This unit can be DIN-rail or surface-mounted.


  • Unique probe protection logic
  • LED status indicators
  • Invertible relay logic
  • Two relay contacts
  • PumpSaver® product

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Termination TypeMounting MethodDimensionsWeight (lbs/g)HumidityInput AC Line Frequency (Hz)Maximum Input PowerOutput Load Rating (VA)Protection ClassSense VoltageSensitivity (Ohms)Storage Temperature (F/C)StockSamples
460-15-100-SLD110 - 120 Vac nominalDPST - 2 Form ATorque: 6 in-lbs; Wire: Stranded or solid 12 - 20 AWG35mm DIN rail or Surface Mount (#6 or #8 screws)3.5 H x 2.08 W x 2.35 D in. (88.9 x 52.9 x 59.7 mm)0 Kg10 - 95% non-condensing per IEC 68-2-350 / 60 (50 will increase all delay timers by 20%)2Pilot Duty: 360 VA @ 240 Vac B300; General Purpose: 8 A @ 240 VacIP20; NEMA 1 (finger safe)5 Vdc continuous (probe)4.7 - 100-40° to 80°C (-40° to 176°F)CheckOrder
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