It's included in Cylinder, Threaded - M8 so you can find it easily. It is possible to use the proximity sensors at -25°C~70°C. A proximity sensor's supply voltage should be set to 24V for maximum efficiency. Despite their low operating temperature -25°C, proximity sensors are still able to function. In order to operate, proximity sensors must have an operating temperature below 70°C. It is important that the rate of the proximity sensor be set at 1.1kHz so that the proximity sensor switch can function properly. Reed switches are designed to use reed switches with internal contacts that pass 500μA current.