LJ12A3-4-Z/BX NPN DC6-36V Approach Sensor Inductive Proximity Switch

The LJ12A3-4-Z/BX is a high-quality inductive proximity sensor switch designed for non-contact detection of metallic objects.It operates on DC 6–36V and provides an NPN normally open (NO) output, making it easy to integrate with microcontrollers (Arduino, ESP32, Raspberry Pi) or industrial controllers.With a sensing distance of up to 4mm, this durable sensor is widely used in CNC machines, 3D printers (auto bed leveling), conveyor systems, robotics, and automation projects.

Technical Specifications

• Model: LJ12A3-4-Z/BX

• Type: Inductive Proximity Sensor (Metal detection only)

• Output Type: NPN, Normally Open (NO)

• Detection Distance: 4 mm (effective for iron, shorter for non-ferrous metals)

• Operating Voltage: DC 6–36V

• Output Current: ≤ 300 mA

• Response Frequency: 500 Hz

• LED Indicator: Built-in (status light)

• Cable Length: ~1 meter (3-wire: Brown, Blue, Black)

• Wiring:

  • Brown → VCC (+6–36V DC)

  • Blue → GND

  • Black → Signal Output (NPN)

• Housing Material: Nickel-plated brass

• Thread Size: M12 × 60 mm

• Operating Temperature: -25°C ~ +70°C

Package Includes

• 1 × LJ12A3-4-Z/BX Inductive Proximity Sensor Switch