The LJ12A3-4-Z/DX Inductive Proximity Sensor is a cylindrical metal-body sensor used to detect nearby metal objects without physical contact. It works on the inductive sensing principle, generating an electromagnetic field that changes when a metal object (such as iron) comes within its detection range. This makes it widely used in automation, robotics, conveyor systems, and object detection applications.
 
The sensor features a durable metal threaded housing for easy mounting and reliable performance in industrial environments. With a 4 mm detection distance and NC (Normally Closed) output, it can be connected to microcontrollers, PLC systems, or control circuits to detect the presence of metal parts.
 
Specifications
Product Name: Inductive Proximity Switch
Model: LJ12A3-4-Z/DX
Sensor Type: Inductive Proximity Sensor
Output Type: NC (Normally Closed)
Wire Type: 2-Wire (Brown, Blue)
Detection Distance: 4 mm
Supply Voltage: DC 6 – 36 V
Output Current: 200 mA
Detectable Material: Iron / Metal objects
Sensor Body Type: Cylindrical metal shell
Sensor Diameter: 10.5 mm
Thread Diameter: 12 mm
Total Size: 67 × 21 mm (L × Max Diameter)
Cable Length: 1 m
External Material: Plastic and Metal
 
Key Features
Non-contact metal detection using inductive sensing
4 mm sensing range for accurate object detection
Durable metal threaded cylindrical housing
Normally Closed (NC) output for control circuits
Wide DC 6–36 V operating voltage
Suitable for automation, robotics, and industrial detection systems