Honeywell Ceramic Manual Reset Thermostats, 2450CMG Series, 2450CMG80890028, Switch Type SPST, Manual Reset, Open on Rise, Contact Type Gold Alloy, Ceramic, 0.5 A, B230, T147, Operating Temperature 52 °C to 232 °C [125 °F to 450 °F], Open Temperature 232.22 °C [450 °F], Close Temperature "Manual Reset", Open Tolerance 11.11 °C [20 °F], Close Tolerance N/A