This is included with the Cylinder, Threaded - M18 package for your convenience. When the operating temperature is -40°C~85°C, proximity sensors can function well. It's got 2 pins. For maximum efficiency, the proximity sensors should be supplied with a voltage of 24V. For the proximity sensors to work properly, the rate needs to be 25Hz. To make proximity sensors work properly, the reed switch's internal contacts should be conducting 300mA current.