It's included in Cylinder, Threaded - M18 so you can find it easily. It is possible to use the proximity sensors at -25°C~70°C. 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. DC circuits can withstand the maximum voltage of 24V without damaging proximity sensors. If the proximity sensors are in a DC circuit, their current shouldn't be lower than 12V, otherwise, there can be a problem.