With the Cylinder, Threaded - M12 package, it is included for your convenience. When the operating temperature is -25°C~70°C, proximity sensors can function well. The supply voltage of proximity sensors should be set to 30V for maximum efficiency. For the proximity sensors to work properly, the reed switch's internal contacts should pass 200mA current. DC circuits can handle a maximum voltage of 30V without damaging proximity sensors. DC circuits with proximity sensors should not have currents lower than 10V, otherwise, they are dangerous.