The Beverage Air 502-293B Thermostat With Knob is a temperature control device used in commercial refrigeration equipment to maintain desired cold settings. It features a straight sensing bulb and a 31-inch capillary that detects temperature changes within the refrigerated compartment and signals the system to cycle cooling on or off. The cut-out at 20 °F ensures the equipment stops c... https://www.partsfe.co.uk/beverage-air-502-293b-thermostat-w-knob