How's it work? The Pressure Switch on Air Compressors...The air compressor pressure switch measures the pressure inside your air tank and then is used to turn on the air compressor when the air pressure reaches the cut-on pressure setting and then shut off your compressor when your air tank reaches the air pressure cut-off setting.
Most air compressors use a pressure switch pre-set from the factory for 95 psi cut-on and 125 psi cut-off settings or 95 psi cut-on and 175 psi cut-off settings. The pressure switches have a 30-65 psi differential setting which allows you to set the pressure switch for custom pressure settings. Please refer to the owners manual for proper settings for the air compressor.