Littelfuse Model 460-15-100-SLD Seal Leak Detector 110-120V 8-Pin Plug-InLittelfuse 460 15 100 SLD Seal Leak Detector Product Description The PumpSaver 460 15 100 SLD is a seal leak detector to sense seal failures on submersible pumps. As water leaks into the motor, the resistance measured by the probe decreases. When the resistance drops below the sensitivity control level, 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