Service:Compatible gases.Temperature Limit:-49 to 176°F (-45 to 80°C).Enclosure Rating:Explosion-proof NEMA 7 & 9, Class I, Divisions 1 & 2, Groups C & D; Class II, Division 1, Groups E, F & G; Class II, Division 2, Groups F & G; Class III; Class I, Zones 1 & 2, Groups IIA & IIB.Switch Type:SPDT snap action switch.Electrical Rating:22 A @ 480 VAC (res.), 1/2 HP @ 125 VAC, 1 HP @ 250 VAC.Electrical Connection:Screw terminal.Conduit Connection:3/4″ female NPT.Set Point Adjustment:External knob.Adjustable Range:36 to 82°F (2 to 28°C).Deadband:2.5°F (1.5°C).Weight:2.1 lb (0.95 kg).Approvals:CSA, UL.