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Resistance Sensors (Single Probe, Pump Up Logic with Time Delayed Output) Model NS156

Reliably manage tank fluid levels with a relay that features a fixed time delay. This single-probe relay uses pump up logic. As liquid is removed from a tank and contact with a probe is interrupted, a fixed time delay is started. At the end of the time delay, the output is activated until the level rises and contacts the probe. If the tank is non-conductive, a second (common) probe must be installed at a level where it will always be submerged.


● 100% functionally tested
● Solid state sensing circuitry
● Isolated UL Class ll sensing voltage
● 1/4" male fast-ons for circuit connection
● Conformal coating to protect circuit from harsh environments