TPI EPETD8D Series EPET Hazardous Location Thermostat for Single Phase, DPDT, Bi-Metal, 22 Amps, 120-277V Supply Voltage, 50&deg; - 90&deg;F Celsius and Fahrenheit Temperature Scale Incorporates Bi-Metal Sensor Housing and Plastic Knob Snap Action Switch Casting Tapped Top and Bottom for 3/4 IN Conduit 1/2 IN Aluminum Housing