Air compressor pressure sensor, also known as pressure transmitter. It is a small but very important accessory on the air compressor, which is used to monitor the pressure of the air compressor. The main function of the air compressor pressure sensor is to send a pressure signal to the controller when the pressure in the air storage tank drops to a set low point, and start the compressor to start working. And when the pressure reaches the set maximum pressure, stop the air compressor.