Johnson Controls A19ABC-24CP Remote Bulb Temperature Control Device -30/100°F 8" Adjustable Differential

The Johnson Controls A19ABC-24CP is a remote bulb temperature control equipment that is used to keep the temperature of your HVAC system constant. While the conventional thermostats operate on the basis of sensing temperature at the location of the thermostat, the A19ABC-24CP has a sensor bulb with a variable capillary tube. This bulb is located in the conditioned space so that better control of the temperature can be achieved. The control device receives temperature data from the sensor bulb and switches on the HVAC system (heating or cooling) to achieve the range of temperature set on the unit.