

As a result, the power flows back to the motor and the motor starts again to compress more air. When the pressure inside the tank decreases and drops down to a certain level, the diaphragm gets back into its original shape making the circuit close. The pressure at which the shape of the diaphragm changes enough to stop the power flow to motor resulting in the motor shutdown is called cut-out pressure.

Which, in turn, shuts off the air compressor. As the air pressure inside the tank increases, the diaphragm shape changes resulting in the disconnection of electricity/power to the air compressor motor. It uses some kind of element, or a diaphragm in most cases, to help detect the pressure level. The air compressor pressure switch monitors the pressure of compressed air moving in and out from the air tank.

4.6 What are some of the best 175 PSI Pressure Switches? How does a compressor pressure switch works
