The Delfield 2194012 thermostat regulates temperature in compatible commercial refrigeration equipment by controlling the cooling circuit in response to sensed conditions. Its 3/8" x 3" sensing bulb and 48-inch capillary tube identify the physical configuration of this control. The capillary transfers temperature response from the sensing bulb to the thermostat mechanism, enabling cyc... https://partsfe.com/thermostat-for-delfield-part-2194012/1-2194012.html