產品介紹 - LJ12A3-4-Z/EX 電感式接近開關
中文版：
LJ12A3-4-Z/EX 是一款基于電感原理設計的非接觸式接近開關，適用于工業自動化領域中對金屬物體的可靠檢測。該產品采用直流供電模式，工作電壓范圍覆蓋12V至36V，兼容主流工業設備電源標準，具備良好的環境適應性。其緊湊的M12圓柱形外殼設計（直徑12mm）便于安裝和集成，尤其適合空間受限的應用場景。
作為兩線制常開型傳感器，設備在無金屬物體靠近時保持斷開狀態，當檢測范圍內出現鐵、鋼等導磁材料時，內部電路自動導通輸出信號。檢測距離最高可達4mm，響應時間小于1ms，滿足高速生產線的檢測需求。全封閉不銹鋼外殼配合環氧樹脂灌封工藝，實現IP67防護等級，可有效抵御油污、粉塵及潮濕環境的侵蝕，適用于機床設備、輸送系統、工程機械等多種工業環境。
產品采用寬溫設計，工作溫度范圍覆蓋-25℃至+70℃，確保在寒冷或高溫車間環境中的穩定運行。優化的電磁兼容性設計有效抑制工業現場常見干擾，內置反接保護和過壓保護功能提升設備安全性。安裝時可通過標準M12螺紋快速固定，支持軸向或徑向布線方式，接線端子采用防松脫結構設計，簡化現場調試流程。產品生命周期內免維護，有效降低設備運維成本。
英文版：
Product Introduction - LJ12A3-4-Z/EX Inductive Proximity Sensor
The LJ12A3-4-Z/EX is a non-contact inductive proximity switch designed for reliable metal object detection in industrial automation systems. Operating on 12-36V DC power supply, this sensor features a compact M12 cylindrical housing (12mm diameter) that enables flexible installation in space-constrained applications.
Functioning as a two-wire normally open device, the sensor maintains an open circuit state in idle conditions. When ferrous metals (iron, steel, etc.) enter its 4mm detection range, the internal circuit activates within 1ms response time to generate output signals. The stainless steel housing with epoxy potting achieves IP67 protection rating, providing robust resistance against oil contamination, dust ingress, and moisture exposure. This durability makes it ideal for harsh environments including machining centers, conveyor systems, and construction machinery.
Engineered for industrial reliability, the sensor operates within a wide temperature range of -25℃ to +70℃, maintaining stable performance in extreme workshop conditions. Advanced electromagnetic compatibility design minimizes interference from surrounding equipment, while built-in reverse polarity and overvoltage protection enhance operational safety. The standardized M12 threaded barrel allows quick mounting, supporting both axial and radial cable orientation. Spring-loaded terminal blocks with vibration-resistant design simplify field wiring and maintenance. With its maintenance-free operation and long service life, this sensor effectively reduces total ownership costs for industrial automation systems.
