Description
The Johnson Controls P32AJ-1 is a high-performance 1/2” differential pressure switch used in HVAC systems to measure pressure differentials. Being an SPDT switch, it is designed to work as a switch that can sense changes in pressure and switch circuits on or off with a maximum voltage of 277V. This is essential in HVAC applications where it is necessary to control pressure differentials with considerable accuracy. It functions by monitoring slight pressure differences across its sensor and initiating actions such as fan control or safety shutdown to avoid system damage or inefficiency.









