Proximity Sensor | NPN NO 4mm Detection | DC 6-36V for CNC

This LJ12A3-4-Z/BX inductive sensor finds metal objects up to 4mm away without touching them. It's a non-contact metal detection switch for automated systems. The standard M12 body and wide DC 6-36V input voltage mean this NPN sensor fits many setups. Features and Benefits - 4mm detection distance - This provides a good gap for sensing parts on a conveyor or setting a 3D printer bed. - NPN Normally Open (NO) output - This is a sinking output. It switches the load to ground. This is a common setup for PLCs and microcontrollers. - Standard 3-wire setup - Wiring this LJ12A3-4-Z/BX NPN sensor is simple: brown for positive, blue for negative, and black for the signal. - Built-in LED status light - You can see when the sensor triggers. This helps with initial setup and fixing false triggers. Applications - Use it as an end-stop or for automatic bed leveling on a 3D printer. - Add it to a CNC machine for homing or as a limit switch. - Put it into an industrial automation line to count metal parts. What It Is This NPN NO Inductive Proximity Sensor, model LJ12A3-4-Z/BX, is an electronics module designed for reliable non-contact detection of metallic objects. It operates within a DC 6-36V range and offers a detection distance of 4mm. An inductive proximity sensor creates an electromagnetic field, and when a metallic object enters this field, it causes a change in inductance which the sensor detects, triggering its output. This makes it a robust solution for various industrial automation tasks. Key Uses & Applications This industrial sensor is specifically designed for CNC industrial automation applications, where precise and repeatable detection is crucial. Its 4mm detection distance makes it suitable for tasks requiring close-range sensing. Common uses include position sensing, counting parts on a production line, and detecting the presence of tools or workpieces in a CNC machine. Its NPN NO output type integrates seamlessly into many control systems. How to Choose When selecting a proximity sensor, consider the material you need to detect and the required detection distance. This inductive sensor is ideal for metallic targets and offers a 4mm range. Ensure the operating voltage, DC 6-36V in this case, matches your system's power supply. To test a proximity sensor, connect it to the appropriate voltage and bring a metallic object within its detection range; the output should change state. For applications requiring detection of non-metallic objects, an optical sensor might be more suitable.