FSH21-N系列环形接近开关产品介绍
FSH21-N环形接近开关是一款专为21mm标准检测距离设计的非接触式检测装置，采用环形贯通结构设计，可实现对金属及非金属物体的可靠识别。该产品凭借其创新的环形感应区结构和优化的电磁场分布技术，能够精准识别通过检测区域的目标物体，适用于自动化设备中需要中央贯通的检测场景。
核心优势体现在环形感应区的特殊设计，其内径与检测距离经过精密计算，确保21mm标准尺寸物体的稳定识别。产品采用全封闭式防护结构，防护等级达到IP67标准，有效抵御粉尘、油污及潮湿环境的影响。内置温度补偿电路可在-25℃至+70℃范围内维持检测精度，适应多种工业环境需求。
在工业自动化领域，该传感器可广泛应用于物料分拣系统的到位检测、流水线工件计数、旋转设备的位置监控等场景。其环形结构允许被测物体从中心孔位通过，特别适用于管状物料检测、旋转轴状态监测等特殊安装需求。产品支持DC 10-30V宽电压输入，兼容PNP/NPN两种输出模式，可灵活适配不同控制系统。
技术参数方面，检测距离精确设定为21mm±0.5mm，响应时间小于1ms，确保高速生产线的实时检测需求。产品外壳采用304不锈钢与工程塑料复合结构，既保证机械强度又实现轻量化设计。LED状态指示灯支持360°可视，便于设备调试与状态监控。
FSH21-N环形接近开关通过优化的电磁场控制技术，有效降低相邻设备间的信号干扰。其模块化设计便于安装维护，提供M18×1标准螺纹安装方式，支持水平、垂直等多种安装角度。产品经过严格的耐久性测试，机械寿命超过1000万次，满足工业环境长期稳定运行要求。
English Version:
FSH21-N Annular Proximity Switch Product Introduction
The FSH21-N annular proximity switch is a non-contact detection device specifically designed for 21mm standard detection distance. Featuring a unique ring-shaped sensing structure, this product ensures reliable identification of both metallic and non-metallic objects passing through its central aperture. The optimized electromagnetic field distribution enables precise detection of target objects, making it ideal for automated systems requiring through-beam sensing in confined spaces.
The annular sensing zone is engineered with precise dimensional calculations to maintain stable detection of 21mm standard-sized objects. The fully sealed enclosure provides IP67 protection against dust, moisture, and oil contamination. Built-in temperature compensation ensures consistent performance across -25℃ to +70℃ operating environments.
This sensor finds extensive applications in industrial automation systems including material handling, production line counting, and rotary equipment monitoring. The through-hole design allows unobstructed passage of cylindrical materials while detecting their presence. Compatible with 10-30V DC power supply, it supports both PNP and NPN output configurations for flexible system integration.
Technical specifications include 21mm±0.5mm detection distance and <1ms response time, meeting high-speed production requirements. The hybrid housing combines 304 stainless steel with engineering plastics for durability and lightweight construction. Multi-directional LED indicators facilitate easy status monitoring during operation.
Advanced electromagnetic field control technology minimizes interference from adjacent equipment. The modular design allows multiple installation options via standard M18×1 threaded mounting, adaptable to various spatial configurations. Rigorous endurance testing confirms over 10 million operation cycles, ensuring long-term reliability in demanding industrial environments.
