上海維特銳供應的德國*SCHMERSAL接近開關使用壽命，在其的范圍內，幾乎是無限長的。開關抗振動，不管目標慢慢靠近或離開傳感器，開關都是一次完成動作，沒有聲響。

    德國原裝SCHMERSAL接近開關是種開關型傳感器（即無觸點開關），它既有行程開關、微動開關的特性，同時具有傳感性能，且動作可靠，性能穩定，頻率響應快，應用壽命長，抗干擾能力強等、并具有防水、防震、耐腐蝕等特點。產品有電感式、電容式、霍爾式、交、直流型。

    上海維特銳直接從德國SCHMERSAL原廠家拿貨，直接供應各種SCHMERSAL感應傳感器、施邁賽磁性開關、施邁賽安全開關、模塊、面板

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