Pressure Switch, Pump Control, Standard Action, Factory On/Off Setting (PSI) 40 to 60, Pressure Range (PSI) 10 to 100, Adjustable Differential, Differential Pressure (PSI) 15 to 50, Burst Pressure (PSI) 290, 1, Port Type 1/4 In. NPT (Female), None Unloader, Diaphragm Actuation Type, Manual Switch Action Auto/Off, Single Phase, DPST Contact Type, 20/17 @ 120/240V Amps, 1-1/2, 3, NEMA 1 Enclosure, Temp. Range (F) -22 to 140, Special Features Auto/Off Lever, Standards UL/CSA, Dayton Dayton Water Pump Pressure SwitchesRated 1-1/2 HP at 1-phase, 120V; 3 HP at 1-phase, 230V. Temp. range: -22 to 140 F.UL Listed and CSA Certified.Diaphragm actuated Pressure range: 10 to 100 psi Differential pressure range: 15 to 50 psi 20/17A at 120/240V DPST 1/4" FNPT NEMA 1 enclosure