It's included in Cylinder, Threaded - M12 so you can find it easily. A temperature of -25°C~70°C is a suitable operating temperature for proximity sensors. The maximum efficiency of proximity sensors can be achieved by setting their supply voltage to 24V. In order for the proximity sensors to perform their function, the rate must be 5kHz. ldeally, the reed switch's internal contacts should pass 10mA to make the proximity sensors work properly.