Johnson Controls P40AA-1 Pneumatic Difterentail Pressure Switch 12/2" WC Close-High

The Johnson Controls P40AA-1 Pneumatic Differential Pressure Switch is an essentialdevice used in HVAC systems to measure and control pressure differentials. This is a pressure-type switch which through pressure difference and, depending on the pressure, is either activated or deactivated. It has the single-pole single-throw (SPST) configuration and is made from sturdy metallic casing for use in different climates. It also has a pressure regulator of 50 PSI in cases where there are high pressure systems in HVACs. This switch is essentialfor uni-directional airflow applications to keep the specified pressure differentials necessary for the proper functioning of heating, ventilation, and air conditioning equipment.