LJ12A34Z/DX Inductive Proximity Sensor Switch 2wire DC 636V NC Compact, reliable metal detection for automation and machine control. This inductive proximity sensor provides noncontact detection of ferrous and nonferrous metal targets in tight spaces, with a wide DC supply range and a normally closed 2wire output for simple integration. Key benefits Contactless detection reduces mechanical wear and maintenance compared to mechanical switches. Wide DC supply range 636V improves compatibility with a variety of control systems. Normally closed 2wire output simplifies wiring and failsafe designs where a closed circuit at rest is required. Compact M12 threaded cylindrical housing and 4 mm sensing distance make it easy to mount in spaceconstrained systems. Robust construction and prewired connection allow straightforward installation and stable longterm operation. What it does and how it helps Detects metal targets without physical contact, enabling speed cycling and reducing downtime from switch wear. The NC output stays closed when no metal is present and opens when a metal target enters the sensing range, making it easy to implement presence or absence logic. Operates over a broad DC voltage range so it can be used with battery powered systems, DC control modules, or common industrial power supplies. Key specifications Model: LJ12A34Z/DX Sensor type: Inductive proximity switch Wiring: 2wire prewired Supply voltage: DC 636V Output type: Normally closed (NC) Housing size: M12 threaded cylindrical, compact form factor Sensing distance: 4 mm Installation and compatibility notes Mount using standard M12 nuts for secure positioning. Verify wiring polarity and supply voltage before powerup. NC wiring means the circuit is closed without a target and opens when a target is detected. Compatible with common DC controllers, relays, and automation equipment that accept 2wire NC sensor inputs. Typical applications Conveyor part detection: Verify presence of metal components on production lines for counting and sorting. Position and limit sensing: Use as a noncontact limit switch on machine slides, fixtures, or robotic end stops. Assembly automation: Detect metal fasteners or components during automated assembly and inspection stations. Practical, simple, and dependable, the LJ12A34Z/DX provides compact metal sensing for a wide range of industrial and automation tasks.