The Campbell Hausfeld CW218700AV Air Compressor Pressure Switch ensures safe and efficient control of air pressure by automatically managing compressor operation. This product is a mechanical pressure switch designed to monitor tank pressure and regulate when the compressor motor turns on and off. It works by sensing preset pressure levels, activating the motor when pressure drops and... https://www.wholetoolbox.com/campbell-hausfeld-cw218700av-air-compressor-pressure-switch