Review on M12 Inductive Proximity Switch NPN NO DC 6-36V With 4Mm Detection Range LJ12A3-4-Z/BX By Twidec by Ron Houston

I purchased this inductive sensor as a bed leveling sensor for my Monoprice Select V2. After upgrading the Marlin firmware and making a few changes in the Configuration.h tab I got the sensor to work. I connected the sensor to an Arduino Uno powered with a 9v battery. The sensor is being powered with the input voltage (9v) which gives the sensor enough of a sensing distance that the sensor could be places slightly higher than the hotend nozzle (.12mm). This setup supplied enough voltage to the sensor to get it to detect the aluminum print bed. The higher the input voltage to the sensor the greater the detection distance. I will be trying a voltage divider where the sensor connects to the the Arduino Uno so I can get a higher voltage through the sensor and a lower voltage to the arduino and MKS Gen L board.