接近開關LJ18A3-8Z-BX直流三線NPN常開交流型接近開關
產品概述
LJ18A3-8Z-BX是一款高性能直流三線NPN常開型電感式接近開關，專為工業自動化控制設計。該產品采用非接觸式檢測原理，當金屬物體接近感應區域時，無需物理接觸即可觸發開關動作，實現精準的位置檢測和運動控制。其圓柱形金屬外殼（直徑18mm）結構堅固，適合在機械加工、自動化生產線等場景中穩定工作。工作電壓范圍為DC6-36V，輸出形式為NPN三線常開，具備響應速度快、重復定位精度高等特點。1318
技術特點
該接近開關基于高頻振蕩原理設計，內置振蕩器和信號處理電路，當金屬目標進入感應范圍（標準檢測距離8mm）時，渦流效應導致振蕩衰減并觸發開關信號。產品采用全封閉樹脂填充工藝，具有耐振動、防油污、抗腐蝕等特性，可在-20℃~70℃環境中穩定運行。尾部配備靈敏度調節器，用戶可根據實際需求微調檢測距離。其無機械觸點設計避免了傳統行程開關的磨損問題，使用壽命顯著延長。3616
應用領域
LJ18A3-8Z-BX廣泛應用于機床設備、包裝機械、紡織設備等工業場景，可實現限位控制、自動計數、速度檢測等功能。在汽車制造領域用于零部件定位檢測；在食品飲料行業配合不銹鋼設備使用；在物流分揀系統中實現托盤位置識別。其兼容性強，可直接與PLC、繼電器等控制設備連接，簡化系統集成。典型應用包括沖床安全防護、傳送帶物料檢測、機器人臂端定位等。1422
Product Introduction (英文部分)
The LJ18A3-8Z-BX is an inductive proximity sensor with DC three-wire NPN normally open configuration. Its 18mm cylindrical metal housing provides robust protection in industrial environments. Operating on 6-36V DC power supply, this non-contact switch detects ferrous metal targets within 8mm range through electromagnetic field variation, generating clean switching signals without mechanical wear. The epoxy-resin sealed construction ensures reliable performance in challenging conditions including dust, moisture and vibration.318
Key Features
This sensor features stable oscillation-based detection with automatic output switching when metal objects enter the sensing zone. The built-in sensitivity adjustment allows fine-tuning for different application requirements. With fast response time (<1ms) and high repeat accuracy, it excels in precision positioning tasks. The NPN transistor output (open collector) can directly interface with control systems. Its compact M18 threaded design facilitates easy installation on machinery frames or moving parts. The product s maintenance-free operation reduces downtime in continuous production lines.61623
Typical Applications
Ideal for automation systems requiring metal object detection, including CNC machine tool positioning, conveyor belt monitoring, and robotic assembly lines. Commonly used in automotive welding fixtures for part presence verification, packaging equipment for cap/can counting, and elevator systems for floor level sensing. The sensor s compatibility with standard industrial voltages makes it suitable for retrofitting existing equipment or designing new control circuits. Its non-contact principle eliminates bounce issues common in mechanical limit switches.41822
接近開關LJ18A3-8Z-BX直流三線NPN常開交流型接近開關
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