This ST Grounded Probe Switch is part of the proximity sensor product range designed for precise conductivity sensing. The ST grounded probe switch applications include high temperature environment, light conductive, aggressive mechanical and chemical environments that targets positive end point testing. The switch is actuated when a conductive path between probe terminal and ground is established. The switch requires no warm up time, has a 100ms on response, and a 30ms off delay. The operating voltage is 120VAC, with a normally closed output and a pilot light to indicate operation of the switch. The sensor is a flat profile zinc die cast housing with a 3ft (0.9m) no. 16-4 SJTO sealed cable. The probe terminal is an 8-32 stud protruding from the center of the head. The sensor is compliant with UL standards and NEMA 1, 4, 13 and NEMA B150 rated. This probe is suitable for use with 22487 proximity sensor.