The B652-2AX2 part of Sensata is a pressure switch that is used to monitor pressure levels in air compressors, pumps, and refrigeration systems. This pressure switch is designed to automatically turn on or off the circuit when a pre-set pressure limit is exceeded. It has a standard 1/4 inch NPT male connector and offers adjustable set-point values from 25 to 250 free air PSI. The maximum working pressure for this pressure switch is 500 PSI and the maximum operating temperature is up to 250F. Additionally, the B652-2AX2 has a built-in differential for reduced hysteresis, high contact ratings, and low leakage current.