The Delfield 2194202 thermostat controls temperature in compatible commercial refrigeration equipment by responding to changes detected through its sensing bulb. The 3/8" x 5" bulb and 60-inch capillary define its sensing assembly configuration. As temperature conditions change, the capillary transmits the response to the thermostat mechanism, which regulates the connected cooling cir... https://partsfe.com/thermostat-for-delfield-part-2194202/1-2194202.html