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Resistance Sensors (Dual Probe) Model NS129

Reliably detect and control high fluid levels using our proven dual-probe level relay. When liquid touches the high probe, the output relay is activated until the level drops below the low probe. If the tank is non-conductive, a third (common) probe must be installed at a point always be submerged.


● 100% functionally tested
● Solid state sensing circuitry
● Isolated UL Class ll sensing voltage
● Adjustable sensitivity by Trimpot
● #6 screw terminal connections
● Conformal coating to protect circuit from harsh environments