SPM Series Dual Channel Seal Failure Alarm
The ATC Diversified Electronics SPM Series Seal Failure module is a specialized control for monitoring the shaft seals of submersible pump motors. Leaks are detected by sensing the con-ductivity of the contaminating fluid through probes installed in the seal cavity. When a seal begins to leak, the seal failure module energizes one of its SPST output relays indicating that the seal needs to be replaced before the motor is damaged. The sensitivity of the probe in-puts is field adjustable. When the resistance between one of the probe inputs and the common connection drops below the sensitivity setting, the corresponding output relay and LED are activated.
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