It's included in Cylinder, Threaded - M30 so you can find it easily. Operating temperatures of -25°C~70°C can be suitable for proximity sensors. If you want proximity sensors to perform at their best, you should set their supply voltage to 30V. In order to ensure that the proximity sensors perform their function, the rate should be set to 150Hz. For the proximity sensors to work properly, the reed switch's internal contacts should pass 200mA current.