Johnson Controls A19AAD-12 Remote Bulb Temperature Control Switch -30/50°F,Open-Low, 7Ft Capillary ,2.5Feet Differential

The Johnson Controls A19AAD-12 Remote Bulb Temperature Control Switch is a product that is used in controlling temperature in different HVAC systems. It comprises a remote sensor bulb which is coupled by a 7-feet capillary tube to a switch unit. The switch is activated by the sensor depending on the settings of the temperature in the environment. This switch works as Single Pole, Single Throw (SPST), which means it can manage one circuit and has only two states—on and off. If the temperature goes below the set point which ranges from -30°F to 50°F, the switch is turned ‘on’ which may in turn switch on heating equipment.