LJ12A3-2-Z/DX滬工傳感器價格總覽LJ12A3-2-Z/DX滬工傳感器價格總覽正品滬工集團 品質100%保證LJ系列接近開關（又稱無觸點行程開關）的作用是在接近金屬時就動作，廣泛應用于機床及其他設備的控制之用。
【產品介紹】
【品牌】：滬工集團
【名稱】：電感式接近開關
【輸出方式】：交流二線常閉
【工作電壓】：交流90-250VAC
【外形尺寸】：直徑18毫米圓柱體
【檢測物體】：金屬/鐵
【功能用途】：LJ系列接近開關（又稱無觸點行程開關）的作用是在接近金屬時就動作，廣泛應用于機床及其他設備的控制之用。
【工作原理】：
接近開關由三大部分組成：振蕩器、開關電路、放大輸出電路。振蕩器產生一個交變磁
場。當金屬目標接近這一磁場，并達到感應距離時，在金屬目標內產生渦流，從而導致振蕩
衰減，以至停振。振蕩器振蕩及停振的變化被后級放大電路處理并轉換成開關信號，觸發(fā)驅
動控制器件，從而達到非接觸式之檢測目的。目標離傳感器越近，目標離傳感器越近,線圈
內的阻尼就越大;阻尼越大,傳感器振蕩器的電流就越小.電感式接近開關的電流損耗,隨著與
金屬目標距離的減小而減小.
【主要特征】：
體積小、開關頻率高、重復定位精度高、電壓范圍寬外形結構多樣、防塵、防震、防水、
防油、抗干擾性能好 具備短路保護,反連接保護、輸出形式多 使用壽命長。
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