Proximity Sensor | M12 Inductive 4mm | AC/DC 12V-220V NPN/PNP

This LJ12A3-4-Z/BX inductive proximity sensor finds metal objects up to 4mm away without touching them. The M12 threaded body is a common size for industrial machines, CNC equipment, and 3D printers. We offer several models, including NPN and PNP types with Normally Open (NO) or Normally Closed (NC) outputs. Features and Benefits - 4mm detection distance - Reliably senses metals like steel and iron from a set distance. - NPN and PNP options - Choose the output type your controller needs; NPN switches to ground, PNP switches to positive voltage. - Standard M12 body - The threaded metal housing makes it easy to mount securely with common hardware. - Wide voltage compatibility - Works with systems running on 6V to 36V DC power. Applications - Automated machinery - Finds parts on assembly lines or confirms the position of machine components. - 3D printer bed leveling - Used as a sensor to map the surface of a metal print bed for a good first layer. - CNC axis homing - Gives a reliable and repeatable signal for setting a machine's home position. What It Is This M12 Inductive Proximity Sensor detects objects without physical contact, operating on both AC and DC power supplies. It is designed for industrial applications, functioning as an electronics module to sense metallic objects within a 4mm range. The sensor offers versatile output configurations including NPN and PNP, as well as normally open (NO) and normally closed (NC) options. Its robust copper construction ensures durability in demanding environments. Key Uses & Applications This barrel sensor is ideal for automation tasks requiring precise object detection. It can be used for position sensing, counting parts on a conveyor, or detecting the presence of metallic components in machinery. The 4mm detection distance and ability to operate on 12V or 24V DC, or 110V or 220V AC, make it suitable for a wide range of industrial settings. Its inductive nature means it works by generating an electromagnetic field, which is disturbed by the presence of metal. How to Choose When selecting a proximity sensor, consider the material of the object you need to detect; this inductive sensor is for metallic targets. Evaluate the required detection distance; this model offers 4mm. Check the operating voltage compatibility with your system, as this sensor supports 12V/24V DC and 110V/220V AC. Finally, confirm the necessary output configuration (NPN/PNP, NO/NC) for integration with your control system. To test a proximity sensor, apply power and observe the output change when a metal object enters its detection range.