Pressure Control Switches: Type - Pressure Switch; Operator Type - Diaphragm; Pressure Media - Air, Water, Hydraulic Fluid; Circuit - SPST; Contact Rating - 120/240V 1/0.5A; Operating Range - 25-50 psi; Line Pressure - 250 psi Max; Occasional Surge - 500 psi Max; Enclosure Rating - Open; Connection - 1/8" NPT male; Additional Information - Factory Set: 35 psi. Bellow Material: Polyimide Film. Circuitry: N.O. SPST (2) Screw Terminals; Manufacturer Series - 5000 Series