日本SMC磁性开关干簧管又叫磁控管，它同霍尔元件差不多，但原理性质不同，是利用磁场信号来控制的一种开关元件，无磁断开，可以用来检测电路或机械运动的状态，另一种磁性开关就是市场上所说接近开关、门磁开关、又叫感应开关，它是有干一个开好模具并且是标准尺寸塑胶外壳，将干簧管灌封在黑色外壳里面导线引出来另一半带有磁铁的塑料外壳固定在另一端当这个磁铁靠近带有导线的开关时，发出开关信号！一般信号距离为10mm接通，此产品广泛引用到防盗门、家用门、打印机、传真机、电话机、等电子仪器设备上面。还有一种磁性开关是在密闭的金属或塑料管内，设置一点或多点的磁簧开关，然后将管子贯穿一个或多个，中空而内部装有环型磁铁的浮球，并利用固定环，控制浮球与磁簧开关在相关位置上，使浮球在一定范围内上下浮动。利用浮球内的磁铁去吸引磁簧开关的接点，产生开与关的动作
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