M24系列電容式接近開關(guān) LJ24A3-T-Z/BX（三線NPN常開型）產(chǎn)品介紹
產(chǎn)品概述
M24系列LJ24A3-T-Z/BX電容式接近開關(guān)采用先進檢測技術(shù)，專為非金屬材料檢測場景設(shè)計。圓柱形外殼結(jié)構(gòu)符合工業(yè)環(huán)境安裝要求，三線制NPN輸出配置可便捷接入控制系統(tǒng)。產(chǎn)品工作時不需物理接觸檢測物，通過電場變化實現(xiàn)穩(wěn)定檢測，有效避免機械磨損，延長設(shè)備使用壽命。
工作原理
本產(chǎn)品基于電容感應(yīng)原理，內(nèi)置高頻振蕩電路形成檢測電場。當(dāng)非金屬物體（如塑料、木材、液體等）進入有效檢測區(qū)域時，物料的介電特性將引起電場參數(shù)變化，觸發(fā)內(nèi)部電路狀態(tài)切換，輸出對應(yīng)的開關(guān)信號。該技術(shù)突破傳統(tǒng)接近開關(guān)僅檢測金屬材料的限制，拓展了自動化檢測的應(yīng)用范圍。
核心特點
- 非金屬檢測能力：可穩(wěn)定檢測塑料容器、木質(zhì)板材、液體介質(zhì)等材料的接近狀態(tài)
- 環(huán)境適應(yīng)性：IP67防護等級設(shè)計，耐受粉塵、油污及潮濕環(huán)境
- 靈敏可調(diào)：內(nèi)置靈敏度調(diào)節(jié)旋鈕，可根據(jù)不同介電常數(shù)材料優(yōu)化檢測距離
- 電氣特性：DC10-30V寬電壓支持，兼容主流工業(yè)控制系統(tǒng)電壓標(biāo)準(zhǔn)
- 安裝便捷：標(biāo)準(zhǔn)M24螺紋結(jié)構(gòu)，支持嵌入式或支架式安裝方式
應(yīng)用領(lǐng)域
適用于食品包裝機械的容器檢測、化工生產(chǎn)線的料位監(jiān)控、木工設(shè)備的板材定位等場景。在液體灌裝線中可準(zhǔn)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(tǒng)中能有效檢測紙箱等包裝材料的位置狀態(tài)。
技術(shù)參數(shù)
檢測距離：3-8mm（視材料介電常數(shù)可調(diào)）
響應(yīng)頻率：≤50Hz
輸出電流：≤200mA
工作溫度：-25℃~+70℃
輸出狀態(tài)：常開型（NO）
導(dǎo)線規(guī)格：2米PVC護套電纜
使用注意
安裝時應(yīng)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(yīng)區(qū)域。定期清潔檢測面可維持最佳靈敏度，調(diào)試時建議使用實際物料進行距離標(biāo)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.
