變送(song)(song)(song)(song)器(qi)按測(ce)量物理量可(ke)以分為壓力(li)變送(song)(song)(song)(song)器(qi)、溫(wen)度變送(song)(song)(song)(song)器(qi)、液位變送(song)(song)(song)(song)器(qi)等等；按引線(xian)可(ke)分為兩線(xian)制(zhi)、三(san)線(xian)制(zhi)和四(si)線(xian)制(zhi)三(san)種；按結構(gou)可(ke)分為普通(tong)型(xing)變送(song)(song)(song)(song)器(qi)和隔離型(xing)變送(song)(song)(song)(song)器(qi)兩種。下(xia)面(mian)主要就(jiu)變送(song)(song)(song)(song)器(qi)的(de)結構(gou)來(lai)說(shuo)下(xia)普通(tong)型(xing)和隔離型(xing)壓力(li)變送(song)(song)(song)(song)器(qi)之間的(de)區別。

普通(tong)(tong)型變送器(qi)：普通(tong)(tong)壓(ya)力(li)變送器(qi)的(de)(de)(de)(de)(de)(de)(de)測(ce)量膜(mo)(mo)(mo)(mo)盒(he)為(wei)(wei)(wei)一(yi)個，它直接(jie)感(gan)受被(bei)測(ce)介質的(de)(de)(de)(de)(de)(de)(de)壓(ya)力(li)和差壓(ya)；隔(ge)離(li)型變送器(qi)的(de)(de)(de)(de)(de)(de)(de)測(ce)量膜(mo)(mo)(mo)(mo)盒(he)接(jie)受到(dao)的(de)(de)(de)(de)(de)(de)(de)是(shi)一(yi)種(zhong)穩定液的(de)(de)(de)(de)(de)(de)(de)壓(ya)力(li)，而(er)這種(zhong)穩定液是(shi)被(bei)密封(feng)在兩個膜(mo)(mo)(mo)(mo)片中間，接(jie)受被(bei)測(ce)壓(ya)力(li)的(de)(de)(de)(de)(de)(de)(de)膜(mo)(mo)(mo)(mo)片為(wei)(wei)(wei)外膜(mo)(mo)(mo)(mo)片，原普通(tong)(tong)型膜(mo)(mo)(mo)(mo)盒(he)的(de)(de)(de)(de)(de)(de)(de)膜(mo)(mo)(mo)(mo)片為(wei)(wei)(wei)內(nei)膜(mo)(mo)(mo)(mo)片，當外膜(mo)(mo)(mo)(mo)片上接(jie)受壓(ya)力(li)信號(hao)時通(tong)(tong)過硅油(you)的(de)(de)(de)(de)(de)(de)(de)傳遞原封(feng)不動的(de)(de)(de)(de)(de)(de)(de)將外膜(mo)(mo)(mo)(mo)片的(de)(de)(de)(de)(de)(de)(de)壓(ya)力(li)傳遞到(dao)了(le)(le)普通(tong)(tong)膜(mo)(mo)(mo)(mo)盒(he)上，測(ce)出了(le)(le)外膜(mo)(mo)(mo)(mo)片所感(gan)受的(de)(de)(de)(de)(de)(de)(de)壓(ya)力(li)。

隔(ge)離型(xing)(xing)變(bian)(bian)送器：隔(ge)離型(xing)(xing)變(bian)(bian)送器又(you)被乘(cheng)坐法(fa)蘭式安(an)裝(zhuang)，具體的機構(gou)原理是(shi)(shi)(shi)在被測設備上開(kai)口(kou)加法(fa)蘭式變(bian)(bian)送器，安(an)裝(zhuang)后它的感(gan)應膜(mo)片是(shi)(shi)(shi)設備壁的一(yi)部分，這樣它不會(hui)取出被測介(jie)質(zhi)(zhi)，最大的優點就(jiu)是(shi)(shi)(shi)不會(hui)造(zao)成結(jie)晶(jing)(jing)堵塞壓力變(bian)(bian)送器的測量介(jie)質(zhi)(zhi)一(yi)般非常(chang)的特(te)殊，很容(rong)易出現被測介(jie)質(zhi)(zhi)在離開(kai)測量設備后產生結(jie)晶(jing)(jing)，如果是(shi)(shi)(shi)使用普通型(xing)(xing)變(bian)(bian)送器，則(ze)需要取出介(jie)質(zhi)(zhi)，這樣很容(rong)易導致導壓管和膜(mo)盒室堵塞從而(er)影(ying)響正常(chang)工作，因(yin)此這時候就(jiu)需要選擇隔(ge)離型(xing)(xing)變(bian)(bian)送器。

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