A non-contact inductive proximity sensor designed to detect metal objects with high reliability. It is widely used in industrial automation, robotics, CNC machines, 3D printers, and smart detection systems. This sensor works by generating an electromagnetic field and detecting changes when a metal object enters its sensing range. Features: Non-contact metal detection High stability and fast response Built-in LED indicator for status Rugged cylindrical metal housing (M12 threaded) Suitable for industrial and DIY automation use Long service life due to no physical contact Specifications: Model: LJ12A3-4-Z/BX Sensor Type: Inductive Proximity Sensor Output Type: NPN Normally Open (NO) Operating Voltage: 6V – 36V DC Detection Distance: 4mm (metal objects) Output Current: Up to 300mA Wiring: 3-wire (Brown = V+, Blue = GND, Black = Signal) Housing: M12 threaded metal body Application: CNC machines, 3D printers, robotics, metal detection, automation systems, position sensing