本特利前置器美国全新原装进口，由上海韦米机电设备有限公司优势供应，销售热线：021-61116913，联系人：雷青；移动热线：13296124913，在线QQ2896079243；上海诚信经销，价格优势货期短，签订合同法律保障，放心采购。

前置器一般提供探头需要的电源，对信号进行放大、检波和滤波等。
电涡流位移传感器的探头线圈接受前置器振荡电路来的高频电流，在其周围产生高频磁场，该磁场穿过靠近它的转轴金属表面，在其中产生一个电涡流，该电涡流产生的磁场方向和线圈磁场方向相反，改变了原线圈的感抗，该感抗的变化随探头顶部金属表面的间隙变化而变化。
前置器检测电路检测探头线圈的感抗变化。再经放大电路将感抗变化量变换放大成相应电压变化信号输出。经监测仪进行转换，根据测量的要求将其输出电压的直流部分用做位移量的检测，交流部分用做振动值的检测。
本特利前置器    本特利前置器
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本特利前置器  本特利前置器
21000系列
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本特利前置器  本特利前置器
3300/20-01-01-01-00-00
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本特利前置器  本特利前置器