Pressure switch PEV-1/4-A-SW27 Opens or closes an electrical circuit when a certain pressure value is reached. Adjustable pressure switching point. CE mark (see declaration of conformity)=to EU directive low-voltage devices, Measured variable=Relative pressure, Measurement method=Pneu./elect. pressure transducer, Pressure measuring range=1 - 10 bar, Operating pressure=1 - 10 bar