Resistance Sensors (Dual Probe) Models NS127, NS128 and NS143

Dependably detect high fluid levels in tanks and control them using our proven dual-probe level relays. In the Model NS127 (Pump Down) relay, when the liquid touches the high probe, the output relay is activated until the level drops below the low probe. In Models NS128 and NS143 (Pump Up), when the liquid touches the high probe, the output relay is deactivated until the level drops below the low probe. If the tank is non-conductive, a third (common) probe must be installed at a level where it will always be submerged.

Features:

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