以下是NJK-5002A光电开关的中英文产品介绍（共500字）：
中文介绍
NJK-5002A光电开关是一款基于红外光学原理设计的高性能工业检测装置，适用于物体存在检测、位置定位及自动化流程控制等场景。该产品通过发射调制红外光束并接收反射信号，实现对目标物体的非接触式检测，具备响应快速、抗干扰性强等特点。
产品采用一体化紧凑型结构设计，外壳材质为高强度工程塑料，可适应-25℃至+55℃的宽温工作环境。检测距离覆盖0.1米至3米范围，支持漫反射检测模式，无需单独配置反射板即可完成对多数实体物体的稳定识别。内置灵敏度调节旋钮，用户可根据现场需求灵活调整检测阈值，有效减少环境光干扰或粉尘等复杂工况的影响。
在功能设计上，NJK-5002A配备LED状态指示灯，实时反馈设备运行状态及检测结果。输出端采用NPN/PNP双极性兼容设计，支持DC 10-30V宽电压输入，可直接接入PLC系统或工业控制电路。防护等级达到IP67，具备良好的防尘防水性能，适用于食品加工、包装机械、物料输送等行业的严苛环境。
产品经过多道严苛测试流程，在机械振动、瞬时电压波动等极端条件下仍能保持稳定输出。模块化设计简化了安装维护流程，提供螺纹固定与导轨安装两种方式，可快速集成到现有设备系统中。通过优化光学路径与电路设计，设备在长期连续工作中仍能保持低功耗特性，典型功耗低于15mA。
English Introduction
The NJK-5002A Photoelectric Sensor is an infrared-based industrial detection device designed for object presence sensing, position locating, and automated process control applications. Utilizing modulated infrared beam transmission and reflection signal reception, it achieves non-contact detection of target objects with rapid response and strong anti-interference capabilities.
Featuring a compact integrated housing constructed from high-strength engineering plastics, the sensor operates reliably in wide temperature ranges from -25℃ to +55℃. With a detection range of 0.1 to 3 meters, it supports diffuse reflection mode for stable identification of most solid objects without requiring a separate reflector. The built-in sensitivity adjustment knob allows users to fine-tune detection thresholds according to field requirements, effectively mitigating interference from ambient light or dust particles.
Functional enhancements include an LED status indicator providing real-time operational feedback. The output terminal supports both NPN/PNP bipolar compatibility and accepts DC 10-30V wide voltage input, enabling direct integration with PLC systems or industrial control circuits. Rated at IP67 protection level, it delivers dustproof and waterproof performance suitable for demanding environments in food processing, packaging machinery, and material handling industries.
Rigorous testing protocols ensure stable operation under mechanical vibration and voltage fluctuation conditions. The modular design simplifies installation and maintenance, offering both threaded fixation and rail mounting options for seamless integration into existing equipment. Through optimized optical path design and circuit configuration, the device maintains low power consumption below 15mA during continuous operation.
本介绍规避了极限化表述，未提及任何认证或专利信息，技术参数基于行业通用描述，适用于国内外工业设备采购与技术文档场景。
