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磁(ci)感(gan)應(ying)傳(chuan)感(gan)器(qi)有(you)兩(liang)種(zhong)驅(qu)動(dong)方(fang)式(shi)。一(yi)是(shi)用(yong)永(yong)久(jiu)磁(ci)鐵(tie)驅(qu)動(dong)，二(er)是(shi)用(yong)電(dian)磁(ci)線(xian)圈(quan)驅(qu)動(dong)。前(qian)者(zhe)多(duo)用(yong)於(yu)檢(jian)測(ce)，如(ru)用(yong)磁(ci)鐵(tie)做(zuo)成(cheng)運(yun)動(dong)部(bu)件(jian)，一(yi)旦(dan)接(jie)近(jin)磁(ci)感(gan)應(ying)傳(chuan)感(gan)器(qi)便(bian)可(ke)使(shi)它(ta)吸(xi)合(he)發(fa)出(chu)信(xin)號(hao)。後(hou)者(zhe)多(duo)用(yong)於(yu)控(kong)製(zhi)，若(ruo)電(dian)磁(ci)線(xian)圈(quan)通(tong)電(dian)，觸(chu)點(dian)便(bian)可(ke)吸(xi)合(he)。用(yong)磁(ci)感(gan)應(ying)傳(chuan)感(gan)器(qi)來(lai)取(qu)代(dai)靠(kao)碰(peng)撞(zhuang)接(jie)觸(chu)的(de)行(xing)程(cheng)開(kai)關(guan)，可(ke)提(ti)高(gao)係(xi)統(tong)的(de)可(ke)靠(kao)性(xing)和(he)使(shi)用(yong)壽(shou)命(ming)；因而在可編程序控製器中常用來作為行程到位的發訊裝置。
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