This 1/2 inch lead free bottom entry bimetal thermometer is used in commercial, residential, and institutional HVAC applications. It features a chrome steel case, Kostil polymer window, lead free brass stem, lead free brass amplifying movement, 1/2 inch NPT lead free brass snap-in thermowell, 3 inch probe, and bimetal spiral spring sensing element. This thermometer features a 3 inch dial with temperature range minus 22 to 122 degrees F.