The working principle of the pressure switch is that when the equipment pressure reaches the set value of the pressure switch, the ejector pin is pushed by the sensor (diaphragm, bellows, piston, etc.). ) to close or open the internal microswitch element.
It is mainly used for control, interlock and protection of pressure system.
Common brands: imports: US UE, Kawasaki (it is best not to buy Japanese products now), Rockwell.
Made in China, our hospital only uses Shangyi and Shangyi (Shanghai Instrument Factory Shanghai No.3 Instrument Factory).