The PSNPN Proximity Switch LJ12A3-4-Z/BX is an NPN-NO inductive proximity sensor designed for reliable and precise object detection in industrial applications. It features a built-in red LED indicator to show sensor status, high repeated positioning accuracy, and a high switching frequency for fast response. With a wide voltage range and built-in reverse power and short-circuit protection, it ensures stable performance even in demanding environments. Its robust design offers resistance to vibration, dust, water, and oil, making it ideal for automation systems, CNC machinery, conveyor lines, and PLC integration. This sensor can directly replace mechanical switches and limit switches, providing a long-lasting and maintenance-free solution.