（中文介绍）
LJ18A3-5-Z/CY 电感式接近开关是一款专为工业自动化场景设计的高性能非接触式检测装置。该产品采用电磁感应原理，能够在复杂工况下稳定检测金属物体的存在或移动状态，有效提升设备运行效率和安全性。圆柱形外壳结构紧凑，直径18mm，适配标准安装孔位，便于集成到机械设备、输送线体或装配系统中。
本产品核心优势在于其优化的抗干扰性能和环境适应性。内置高灵敏度感应线圈与信号处理电路，可在5mm有效检测距离内精准识别铁磁性金属目标物，响应时间≤1ms，满足高速生产节拍需求。外壳采用黄铜镀镍材质结合环氧树脂封装工艺，防护等级达到IP67，可耐受油污、粉尘、潮湿及-25℃至+70℃的宽温环境，适用于机床加工、食品包装、汽车制造等严苛场景。
输出端配置直流三线制NPN/PNP兼容接口，支持10-30V宽电压输入，兼容主流PLC及控制器信号规范。产品内置过压保护和反向极性保护功能，避免接线错误导致的设备损坏。LED状态指示灯可实时反馈工作状态，便于现场调试与故障排查。特殊设计的屏蔽结构有效抑制电磁干扰，保障信号传输稳定性。
应用领域涵盖自动化产线的定位检测、传送带物料计数、机械臂动作控制、安全门状态监控等场景。其非接触式工作原理可减少机械磨损，延长设备使用寿命。安装时建议保持感应面与目标物平行，并避免周围存在强磁场或同类型传感器的密集排布，以确保检测精度。
（英文介绍）
LJ18A3-5-Z/CY Inductive Proximity Sensor is a high-performance non-contact detection device specifically engineered for industrial automation applications. Operating on electromagnetic induction principles, it reliably detects the presence or movement of metallic objects in challenging environments, effectively enhancing operational efficiency and system safety. The cylindrical housing with 18mm diameter features a compact design compatible with standard mounting fixtures, enabling seamless integration into machinery, conveyor systems, and automated assembly lines.
This sensor excels in interference resistance and environmental adaptability. Equipped with a high-sensitivity induction coil and advanced signal processing circuitry, it achieves precise detection of ferromagnetic metal targets within a 5mm sensing range, delivering rapid response times ≤1ms to meet high-speed production requirements. The brass-nickel plated housing with epoxy resin encapsulation provides IP67 protection rating, ensuring reliable operation in environments with oil contamination, dust, moisture, and temperature fluctuations from -25℃ to +70℃. These characteristics make it ideal for demanding applications including CNC machining, food packaging, and automotive manufacturing.
Featuring a DC three-wire system with NPN/PNP compatible outputs, the sensor supports 10-30V wide voltage input and complies with mainstream PLC signal specifications. Built-in overvoltage protection and reverse polarity protection prevent equipment damage caused by wiring errors. The integrated LED status indicator provides real-time operational feedback for efficient commissioning and troubleshooting. Specially shielded construction effectively suppresses electromagnetic interference, ensuring stable signal transmission across industrial environments.
Typical applications include position detection in automated production lines, material counting on conveyors, robotic arm motion control, and safety door monitoring. Its non-contact working principle minimizes mechanical wear, significantly extending service life. For optimal performance, installers should maintain parallel alignment between the sensing face and target object, while avoiding proximity to strong magnetic fields or dense arrangements of similar sensors to ensure detection accuracy.
