一、差壓變送器可以用來測量什么

差壓變(bian)送器(qi)是負反饋工作原理的產物(wu)，是自平衡檢(jian)測(ce)(ce)儀(yi)表的代表，采用新(xin)生產技術，克服了元件在(zai)材(cai)料，生產工藝上面(mian)的不(bu)利因素，密(mi)封性(xing)強(qiang)，可(ke)有效防止(zhi)測(ce)(ce)量介(jie)質進(jin)入儀(yi)表內，對儀(yi)表造成損(sun)壞或(huo)者影響測(ce)(ce)量效果，輸出標準信(xin)號，可(ke)測(ce)(ce)量液(ye)，氣，蒸汽等介(jie)質的液(ye)位與流量，壓力。

二、差壓變送器如何測量液位

前文已經(jing)簡單了解到了差(cha)壓變(bian)送器(qi)可以用來測量液位(wei)，那么具體的差(cha)壓變(bian)送器(qi)如何測量液位(wei)呢(ni)？

差(cha)(cha)壓(ya)(ya)變(bian)送(song)器(qi)(qi)通(tong)常用于測(ce)量密(mi)閉容(rong)(rong)器(qi)(qi)內(nei)的液(ye)(ye)位，利用液(ye)(ye)體自(zi)身重力(li)產生的壓(ya)(ya)力(li)差(cha)(cha)來測(ce)量容(rong)(rong)器(qi)(qi)內(nei)液(ye)(ye)體的液(ye)(ye)位。其高壓(ya)(ya)側測(ce)量管(guan)由于蒸汽凝(ning)結(jie)，始終處于充(chong)滿水狀(zhuang)態，保持壓(ya)(ya)力(li)恒定(ding)，而低壓(ya)(ya)側測(ce)量管(guan)與容(rong)(rong)器(qi)(qi)組成(cheng)聯通(tong)器(qi)(qi)，其壓(ya)(ya)力(li)隨容(rong)(rong)器(qi)(qi)內(nei)液(ye)(ye)位的變(bian)化(hua)(hua)成(cheng)線性變(bian)化(hua)(hua)。

差(cha)壓(ya)(ya)(ya)(ya)變(bian)送(song)(song)器(qi)測(ce)量液(ye)位時，零位的(de)設置是非常重要的(de)環節(jie)。當變(bian)送(song)(song)器(qi)的(de)高(gao)(gao)壓(ya)(ya)(ya)(ya)（H）側、低(di)(di)壓(ya)(ya)(ya)(ya)（L）側與就地(di)測(ce)量筒(tong)的(de)高(gao)(gao)壓(ya)(ya)(ya)(ya)側、低(di)(di)壓(ya)(ya)(ya)(ya)側連接(jie)一(yi)致(zhi)時，高(gao)(gao)壓(ya)(ya)(ya)(ya)側導壓(ya)(ya)(ya)(ya)管始終處于充滿水狀態，變(bian)送(song)(song)器(qi)高(gao)(gao)壓(ya)(ya)(ya)(ya)端(duan)測(ce)得(de)壓(ya)(ya)(ya)(ya)力為P+kPa，變(bian)送(song)(song)器(qi)的(de)低(di)(di)壓(ya)(ya)(ya)(ya)側與低(di)(di)壓(ya)(ya)(ya)(ya)側導壓(ya)(ya)(ya)(ya)管相連，測(ce)得(de)壓(ya)(ya)(ya)(ya)力為P-kPa，則(ze)變(bian)送(song)(song)器(qi)測(ce)得(de)實際差(cha)壓(ya)(ya)(ya)(ya)為（P+-P-）kPa。