Easily add an automatic bed level system to your 3D printer with this inductive distance sensor. The sensor triggers on metal objects and has a theoretical measuring distance of 4mm. The diameter of the sensor is 12mm.
The sensor operates on 6V-36V DC and is an NPN variant/NO. The sensor has an internal pull-up resistor which makes it necessary to add a series resistor to the signal connection.
Wire colours:
Brown: +V (12V)
Black: Output (to series resistor 10k)
Blue: 0V (gnd)