LJ12A3-4-Z/BX Inductive Proximity Sensor – 3-Wire, NPN NO

LJ12A3-4-Z/BX Inductive Proximity Sensor – 3-Wire, NPN NO

The LJ12A3-4-Z/BX Inductive Proximity Sensor is a highly reliable 3-wire sensor designed to detect metal objects without physical contact. Operating on the principle of electromagnetic induction, this sensor is widely used in industrial automation, CNC machinery, robotics, and security systems. With its cylindrical M12 form factor and durable metal housing, it is built for rugged environments and long-term performance.

Thanks to its non-contact sensing technology, the LJ12A3-4-Z/BX reduces mechanical wear, offers fast response times, and ensures high repeatability — all while maintaining low power consumption. Its NPN Normally Open (NO) output configuration makes it compatible with a wide range of microcontrollers and PLC systems.

Applications:

• Industrial automation and production lines
• CNC machines and limit switching
• Object detection and counting systems
• Robotics and motion detection
• Security and access control systems
• DIY electronics and smart home projects

Key Features & Technical Specifications:

• Model: LJ12A3-4-Z/BX

• Sensor Type: Inductive Proximity Sensor

• Mounting Type: Threaded cylindrical M12 with nut (machine and breadboard-friendly)

• Detection Distance: Up to 4 mm

• Output Type: NPN Normally Open (NO)

• Wiring Configuration: 3-wire (Brown: VCC, Blue: GND, Black: Signal)

• Operating Voltage: 6V – 36V DC

• Output Current: Max. 300 mA

• Response Frequency: 0.5 KHz (500 Hz)

• Sensing Object: Detects metallic (ferromagnetic) materials only

• Material: Nickel-plated brass body with durable plastic cap

• Protection Grade: IP67 (Dustproof & waterproof)

• Operating Temperature: -25°C to +70°C (non-freezing conditions)

• Cable Length: ~1 meter

This sensor is ideal for projects where precision, speed, and durability are essential. Its ease of integration and robust design make it a go-to choice for both professionals and hobbyists alike.