LJ12A3-4-Z/BX Proximity Sensor NPN NO - 4mm - M12 - 5V

An inductive proximity/distance sensor that can detect metallic objects at close range. As soon as a metal object is detected, the signal wire and ground are connected with a transistor. If no object is detected, the signal wire takes the voltage of the power supply through the built-in pull-up resistor. For example, the sensor can be used in 3D printers.

Pinout:

• Brown: Supply voltage/+
• Blue: GND/Ground/-
• Black: Signal output

Note: The sensor only works with metals, so not with glass or plastic, for example.