It's included in Cylinder, Threaded - M12 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 30V for maximum efficiency. It is important that the rate of the proximity sensor be set at 1.2kHz so that the proximity sensor switch can function properly. DC circuits can withstand the maximum voltage of 30V without damaging proximity sensors. If the proximity sensors are in a DC circuit, their current shouldn't be lower than 10V, otherwise, there can be a problem.