Pressure Switch Air Compressor Manual Switch Action None (1) Port 1/4 in FNPT Pressure Switch Factory On/Off Setting 120/150 psi 1/4 in Compression Pressure Switch Unloader Pressure Switch Differential 25 to 65 psi Pressure Switch Range 25 to 160 psi Pressure Switch Electrical Contact Form DPST Pressure Switch Action Standard NEMA Rating 1 Series MDR11 HP @ 1 Phase - 120V 2 hp HP @ 1 Phase - 240V 3 hp Temp Range -22 Degrees to 257 Degrees F Standards CSA Certified UL Listed