We have included it with the Cylinder, Threaded - M30 package in order to make your life easier. It is possible to operate proximity sensors successfully at a temperature of -25°C~70°C. The supply voltage of proximity sensors should be set to 253V for maximum efficiency. ldeally, the reed switch's internal contacts should pass 200mA to make the proximity sensors work properly. There is a maximum voltage of 30V that can be applied to the proximity sensors without causing damage to the DC circuit. There should be no current flowing through the proximity sensors in the DC circuit below 10V, otherwise it could prove hazardous.