The Dual Seal Leakage Relay (DSLR) provides Seal Leakage alarms for Submersible Pumps. The DSLR is capable of monitoring two pumps simultaneously.

The DSLR detects moisture inside a pump motor by using a low voltage AC signal to measure the resistance between the two Leakage Probes and the grounded motor housing. The potentiometer on the DSLR is used to adjust the resistance necessary to produce a Seal Leakage Condition. A Seal Leakage condition is considered present when the amount of moisture in the motor causes the resistance between the Leakage Probes and ground to drop below the setting on the potentiometer. When this occurs and the Leakage Detection Delay expires, the DSLR turns on the Leakage Indication LED corresponding to the Leakage Probe that identified the leak. The DSLR then energizes the Leakage Alarm Relay(s) closing the contacts between terminals 3 and 4, or 5 and 4, depending upon which Leakage Probe identified the leakage condition.