产品介绍 - LJ12A3-4-Z/EX 电感式接近开关
中文版：
LJ12A3-4-Z/EX 是一款基于电感原理设计的非接触式接近开关，适用于工业自动化领域中对金属物体的可靠检测。该产品采用直流供电模式，工作电压范围覆盖12V至36V，兼容主流工业设备电源标准，具备良好的环境适应性。其紧凑的M12圆柱形外壳设计（直径12mm）便于安装和集成，尤其适合空间受限的应用场景。
作为两线制常开型传感器，设备在无金属物体靠近时保持断开状态，当检测范围内出现铁、钢等导磁材料时，内部电路自动导通输出信号。检测距离最高可达4mm，响应时间小于1ms，满足高速生产线的检测需求。全封闭不锈钢外壳配合环氧树脂灌封工艺，实现IP67防护等级，可有效抵御油污、粉尘及潮湿环境的侵蚀，适用于机床设备、输送系统、工程机械等多种工业环境。
产品采用宽温设计，工作温度范围覆盖-25℃至+70℃，确保在寒冷或高温车间环境中的稳定运行。优化的电磁兼容性设计有效抑制工业现场常见干扰，内置反接保护和过压保护功能提升设备安全性。安装时可通过标准M12螺纹快速固定，支持轴向或径向布线方式，接线端子采用防松脱结构设计，简化现场调试流程。产品生命周期内免维护，有效降低设备运维成本。
英文版：
Product Introduction - LJ12A3-4-Z/EX Inductive Proximity Sensor
The LJ12A3-4-Z/EX is a non-contact inductive proximity switch designed for reliable metal object detection in industrial automation systems. Operating on 12-36V DC power supply, this sensor features a compact M12 cylindrical housing (12mm diameter) that enables flexible installation in space-constrained applications.
Functioning as a two-wire normally open device, the sensor maintains an open circuit state in idle conditions. When ferrous metals (iron, steel, etc.) enter its 4mm detection range, the internal circuit activates within 1ms response time to generate output signals. The stainless steel housing with epoxy potting achieves IP67 protection rating, providing robust resistance against oil contamination, dust ingress, and moisture exposure. This durability makes it ideal for harsh environments including machining centers, conveyor systems, and construction machinery.
Engineered for industrial reliability, the sensor operates within a wide temperature range of -25℃ to +70℃, maintaining stable performance in extreme workshop conditions. Advanced electromagnetic compatibility design minimizes interference from surrounding equipment, while built-in reverse polarity and overvoltage protection enhance operational safety. The standardized M12 threaded barrel allows quick mounting, supporting both axial and radial cable orientation. Spring-loaded terminal blocks with vibration-resistant design simplify field wiring and maintenance. With its maintenance-free operation and long service life, this sensor effectively reduces total ownership costs for industrial automation systems.
