As an added convenience, the Cylinder, Threaded - M18 package includes it. Temperatures of -40°C~70°C are ideal for proximity sensors. Pins 4 are present on this electronic component. To maximize the efficiency of proximity sensors, it is recommended that the supply voltage be set to 24V. It is possible to operate proximity sensors at -40°C. A proximity sensor cannot operate at a temperature higher than 70°C. If the rate is 400Hz, then the proximity sensors will function. Reed switches work well with proximity sensors when their internal contacts pass 200mA current.