The Southbend SOU9126-1 Range Thermostat 140–284°F Capillary 36" regulates heat by sensing temperature through its 36-inch capillary tube and adjusting gas flow to maintain the selected setting. It operates within a temperature range of 140°F to 284°F, providing controlled heat for commercial cooking applications. The sensing bulb monitors temperature changes inside the cooking equipm... https://partsfe.com/sou9126-1-southbend-thermostat