因为SCHMERSAL位移传感器可以根据不同的原理和不同的方法做成，而不同的位移传感器对物体的“感知”方法也不同

    德国施迈赛涡流式接近开关有时也叫电感式接近开关。它是利用导电物体在接近这个能产生电磁场接近开关时，使物体内部产生涡流。这个涡流反作用到接近开关，使开关内部电路参数发生变化，由此识别出有无导电物体移近，进而控制开关的通或断。这种接近开关所能检测的物体必须是导电体。

    上海维特锐直接从德国SCHMERSAL原厂家拿货，直接供应各种SCHMERSAL感应传感器，施迈赛磁性开关，施迈赛安全开关

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