M24系列电容式接近开关 LJ24A3-T-Z/BX（三线NPN常开型）产品介绍
产品概述
M24系列LJ24A3-T-Z/BX电容式接近开关采用先进检测技术，专为非金属材料检测场景设计。圆柱形外壳结构符合工业环境安装要求，三线制NPN输出配置可便捷接入控制系统。产品工作时不需物理接触检测物，通过电场变化实现稳定检测，有效避免机械磨损，延长设备使用寿命。
工作原理
本产品基于电容感应原理，内置高频振荡电路形成检测电场。当非金属物体（如塑料、木材、液体等）进入有效检测区域时，物料的介电特性将引起电场参数变化，触发内部电路状态切换，输出对应的开关信号。该技术突破传统接近开关仅检测金属材料的限制，拓展了自动化检测的应用范围。
核心特点
- 非金属检测能力：可稳定检测塑料容器、木质板材、液体介质等材料的接近状态
- 环境适应性：IP67防护等级设计，耐受粉尘、油污及潮湿环境
- 灵敏可调：内置灵敏度调节旋钮，可根据不同介电常数材料优化检测距离
- 电气特性：DC10-30V宽电压支持，兼容主流工业控制系统电压标准
- 安装便捷：标准M24螺纹结构，支持嵌入式或支架式安装方式
应用领域
适用于食品包装机械的容器检测、化工生产线的料位监控、木工设备的板材定位等场景。在液体灌装线中可准确识别透明玻璃瓶或塑料桶的到位情况，在自动化仓储系统中能有效检测纸箱等包装材料的位置状态。
技术参数
检测距离：3-8mm（视材料介电常数可调）
响应频率：≤50Hz
输出电流：≤200mA
工作温度：-25℃~+70℃
输出状态：常开型（NO）
导线规格：2米PVC护套电缆
使用注意
安装时应确保检测面与物料移动方向保持垂直，避免金属物体靠近感应区域。定期清洁检测面可维持最佳灵敏度，调试时建议使用实际物料进行距离标定。
Product Introduction of LJ24A3-T-Z/BX Capacitive Proximity Sensor
Overview
The M24 series LJ24A3-T-Z/BX capacitive proximity sensor employs non-contact detection technology specifically designed for non-metallic material sensing. Featuring a cylindrical housing with 24mm diameter, this 3-wire NPN normally open device provides reliable switching signals through electric field variation detection. Its contactless operation eliminates mechanical wear, ensuring long-term operational stability.
Operating Principle
Utilizing capacitive sensing technology, the device generates high-frequency oscillating electromagnetic field. When non-conductive materials (plastics, wood, liquids, etc.) enter the effective detection range, the dielectric properties of the target alter the electric field parameters, triggering the output state change. This innovative approach overcomes traditional limitations of metallic object detection.
Key Features
- Non-metallic detection: Capable of sensing various dielectric materials including PVC, ceramics and composite materials
- Adjustable sensitivity: Built-in potentiometer allows precise tuning for different material characteristics
- Robust construction: IP67 rated housing resists water ingress and particulate contamination
- Wide compatibility: 10-30VDC operating voltage supports mainstream industrial control systems
- Flexible installation: Standard M24 threaded barrel design with multiple mounting options
Typical Applications
Ideal for position detection in plastic injection molding machines, liquid level monitoring in chemical processing equipment, and package presence verification in automated packaging lines. Particularly effective in detecting transparent containers on bottling systems and cardboard boxes in logistics sorting equipment.
Technical Specifications
Sensing distance: 3-8mm (adjustable based on material)
Response frequency: ≤50Hz
Output current: ≤200mA
Operating temperature: -25℃~+70℃
Output type: Normally open (NO)
Cable length: 2 meters PVC jacket
Usage Guidelines
Maintain perpendicular alignment between sensor face and target movement direction. Avoid proximity to large metal objects during installation. Periodic cleaning of detection surface is recommended to ensure optimal performance. Actual material samples should be used for precise distance calibration during commissioning.
