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The LJ12A3-4-Z/BX is a high-performance, cylindrical Inductive Proximity Sensor. It is specifically designed to detect metallic objects (primarily iron and steel). When a metal object enters its sensing zone, the internal oscillator is dampened, triggering the NPN transistor to “sink” the output to ground. Its M12 threaded body and dual-nut design make it incredibly easy to mount on 3D printer carriages, CNC frames, or conveyor belts.
Non-Contact Reliability: No physical contact means no mechanical wear, ensuring millions of trigger cycles.
Auto-Leveling Ready: The go-to sensor for 3D printer enthusiasts looking to solve the “warped bed” problem.
Rugged Construction: Features a nickel-plated brass shell and an IP65 rating, making it resistant to dust and light oil splashes.
Visual Feedback: Built-in red LED indicator lights up immediately when metal is detected.
Wide Voltage Range: Works on industrial 24V systems or standard 12V battery setups.
| Feature | Specification |
| Model | LJ12A3-4-Z/BX |
| Output Type | NPN / Normally Open (NO) |
| Sensing Distance | 4mm ± 10% (Optimal for Iron) |
| Operating Voltage | 6V to 36V DC |
| Output Current | 300 mA (Max Sinking) |
| Thread Size | M12 (12mm Diameter) |
| Response Frequency | 500 Hz |
| Cable Length | Approx. 1.0 to 1.2 Meters |
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