小巧型(xing)壓力控制器采用(yong)膜片式(BL-Y18A,BL-Y18C)或(huo)者無(wu)泄(xie)漏活塞式(BL-Y18B)傳感器兩種形式，可用(yong)于空氣、氣體等(deng)中性氣體和水、液(ye)壓油、輕燃(ran)油、潤(run)滑油及其他對壓力傳感器材料無(wu)腐蝕(shi)作(zuo)用(yong)的(de)液(ye)體介質(zhi)。控制器的(de)設定值(zhi)可調(diao)，調(diao)節(jie)范(fan)圍分別(bie)為-0.1-1.6MPa （BL-Y18A系(xi)列），0.5-40MPa （BL-Y18B系(xi)列）和0.02-3Mpa（BL-Y18C系(xi)列）。

當系統內壓(ya)(ya)力(li)(li)(li)高于或低于額(e)定(ding)的(de)安(an)全壓(ya)(ya)力(li)(li)(li)時,小巧(qiao)型壓(ya)(ya)力(li)(li)(li)控(kong)制(zhi)器(qi)-感應器(qi)內碟片(pian)瞬時發生(sheng)(sheng)移(yi)動(dong)(dong),通(tong)過連接導桿(gan)推動(dong)(dong)開(kai)(kai)關(guan)接頭接通(tong)或斷開(kai)(kai),當壓(ya)(ya)力(li)(li)(li)降至或升額(e)定(ding)的(de)恢(hui)復值(zhi)時,碟片(pian)瞬時復位(wei),開(kai)(kai)關(guan)自動(dong)(dong)復位(wei),或者(zhe)簡單的(de)說是當被測(ce)壓(ya)(ya)力(li)(li)(li)超過額(e)定(ding)值(zhi)時,彈(dan)性元(yuan)件(jian)(jian)的(de)自由端產生(sheng)(sheng)位(wei)移(yi),直接或經(jing)過比較后推動(dong)(dong)開(kai)(kai)關(guan)元(yuan)件(jian)(jian),改變(bian)開(kai)(kai)關(guan)元(yuan)件(jian)(jian)的(de)通(tong)斷狀態,達到控(kong)制(zhi)被測(ce)壓(ya)(ya)力(li)(li)(li)的(de)目的(de)。小巧(qiao)型壓(ya)(ya)力(li)(li)(li)控(kong)制(zhi)器(qi)采用(yong)的(de)彈(dan)性元(yuan)件(jian)(jian)有單圈彈(dan)簧管、膜(mo)(mo)片(pian)、膜(mo)(mo)盒(he)及波紋(wen)管等。