These electronic sensors detect the magnetic field of the magnetic piston. Switching points can be easily adjusted by sliding the sensors in the slots. Magnetic Sensors offer several advantages over conventional reed switches, including indifference to shock and vibration, a bounce-free output signal, only one switching point, wear resistance, protection against reverse battery, and protection against short circuits. Voltage 10-30 VDC. Choice of PNP or NPN output signal. Operating temperatures up to 200°.F.