M24系列電容式接近開關 LJ24A3-T-Z/BX（三線NPN常開型）產品介紹
產品概述
M24系列LJ24A3-T-Z/BX電容式接近開關采用先進檢測技術，專為非金屬材料檢測場景設計。圓柱形外殼結構符合工業環境安裝要求，三線制NPN輸出配置可便捷接入控制系統。產品工作時不需物理接觸檢測物，通過電場變化實現穩定檢測，有效避免機械磨損，延長設備使用壽命。
工作原理
本產品基于電容感應原理，內置高頻振蕩電路形成檢測電場。當非金屬物體（如塑料、木材、液體等）進入有效檢測區域時，物料的介電特性將引起電場參數變化，觸發內部電路狀態切換，輸出對應的開關信號。該技術突破傳統接近開關僅檢測金屬材料的限制，拓展了自動化檢測的應用范圍。
核心特點
- 非金屬檢測能力：可穩定檢測塑料容器、木質板材、液體介質等材料的接近狀態
- 環境適應性：IP67防護等級設計，耐受粉塵、油污及潮濕環境
- 靈敏可調：內置靈敏度調節旋鈕，可根據不同介電常數材料優化檢測距離
- 電氣特性：DC10-30V寬電壓支持，兼容主流工業控制系統電壓標準
- 安裝便捷：標準M24螺紋結構，支持嵌入式或支架式安裝方式
應用領域
適用于食品包裝機械的容器檢測、化工生產線的料位監控、木工設備的板材定位等場景。在液體灌裝線中可準確識別透明玻璃瓶或塑料桶的到位情況，在自動化倉儲系統中能有效檢測紙箱等包裝材料的位置狀態。
技術參數
檢測距離：3-8mm（視材料介電常數可調）
響應頻率：≤50Hz
輸出電流：≤200mA
工作溫度：-25℃~+70℃
輸出狀態：常開型（NO）
導線規格：2米PVC護套電纜
使用注意
安裝時應確保檢測面與物料移動方向保持垂直，避免金屬物體靠近感應區域。定期清潔檢測面可維持最佳靈敏度，調試時建議使用實際物料進行距離標定。
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.
