We have included it with the package Cylinder, Threaded - M18 to make it easier for you. Despite the operating temperature of -25°C~70°C, proximity sensors can function well. In order to maximize the efficiency of proximity sensors, it is recommended that the supply voltage be set to 300V. It is important that the rate of the proximity sensor be set at 30Hz so that the proximity sensor switch can function properly. For the proximity sensors to work properly, the reed switch's internal contacts should pass 300mA current.