Johnson Controls A19AAA-46 Remote Bulb Temperature Control -30/100°F,3.5 Fixed Differential ,6',Open-Low

The Johnson Controls A19AAA-46 is a remote bulb temperature control used to set a particular range of temperature in different heating and cooling systems. This consists of a liquid filled sensor that is linked to a control unit by a 6 feet capillary tube. The sensor measures the temperature of the surrounding environment and sends this data through the capillary to the control unit. When the temperature goes high of the set point, the control unit breaks an electrical contact SPST thus, switching off power to the heater. In contrast, when the temperature is lower than the desired point, the contact is non-alarmed to reconnect the supply.