在各儀表中(zhong)，無(wu)錫徽(hui)科(ke)特測控技(ji)術有限公司(si)的露點(dian)變(bian)送器應用廣、普遍，露點(dian)變(bian)送器大(da)體分為壓力露點(dian)變(bian)送器和差壓露點(dian)變(bian)送器。

　　露點變(bian)(bian)送(song)(song)(song)器(qi)又名溫濕度(du)露點變(bian)(bian)送(song)(song)(song)器(qi)，常用來(lai)測量壓力、差壓、真空、液位、流量和密度(du)等。露點變(bian)(bian)送(song)(song)(song)器(qi)有兩制(zhi)和四線(xian)制(zhi)之(zhi)(zhi)分(fen)，兩線(xian)制(zhi)露點變(bian)(bian)送(song)(song)(song)器(qi)尤多(duo)；有智能和非智能之(zhi)(zhi)分(fen)，智能露點變(bian)(bian)送(song)(song)(song)器(qi)漸多(duo)：有氣(qi)動(dong)和電(dian)動(dong)之(zhi)(zhi)分(fen)，電(dian)動(dong)露點變(bian)(bian)送(song)(song)(song)器(qi)居多(duo)；另外，按應(ying)用場合有本安型(xing)和隔(ge)爆型(xing)之(zhi)(zhi)分(fen)。

　　露點(dian)(dian)變(bian)(bian)送(song)(song)器(qi)的選通常根據安裝(zhuang)條(tiao)件(jian)、環境條(tiao)件(jian)、儀表(biao)性(xing)能、經濟性(xing)和(he)(he)應用介(jie)質等方面考慮慮。實際運用中分為直接(jie)測(ce)量和(he)(he)間接(jie)測(ce)量；其(qi)用途(tu)有過程測(ce)量、過程控(kong)制和(he)(he)裝(zhuang)置聯鎖。常見(jian)的露點(dian)(dian)變(bian)(bian)送(song)(song)器(qi)有普通壓力露點(dian)(dian)變(bian)(bian)送(song)(song)器(qi)、差壓露點(dian)(dian)變(bian)(bian)送(song)(song)器(qi)、單(dan)法蘭露點(dian)(dian)變(bian)(bian)送(song)(song)器(qi)、雙(shuang)法蘭露點(dian)(dian)變(bian)(bian)送(song)(song)器(qi)器(qi)、插入(ru)式法蘭露點(dian)(dian)變(bian)(bian)送(song)(song)器(qi)等。

　　壓力(li)(li)変送(song)器(qi)(qi)(qi)和差(cha)壓變(bian)(bian)送(song)器(qi)(qi)(qi)單從名詞上講測(ce)量(liang)(liang)(liang)(liang)的(de)(de)(de)是壓力(li)(li)和兩(liang)個壓力(li)(li)的(de)(de)(de)差(cha)，但(dan)它(ta)們(men)們(men)間接測(ce)量(liang)(liang)(liang)(liang)的(de)(de)(de)參數是有很(hen)多的(de)(de)(de)。如壓力(li)(li)變(bian)(bian)送(song)器(qi)(qi)(qi)，除測(ce)量(liang)(liang)(liang)(liang)壓力(li)(li)外，它(ta)還可(ke)以測(ce)量(liang)(liang)(liang)(liang)設備內的(de)(de)(de)液(ye)位(wei)。在(zai)常(chang)壓容器(qi)(qi)(qi)測(ce)量(liang)(liang)(liang)(liang)液(ye)位(wei)時，需用(yong)(yong)(yong)一(yi)(yi)臺(tai)壓變(bian)(bian)。當測(ce)量(liang)(liang)(liang)(liang)受壓容器(qi)(qi)(qi)液(ye)位(wei)時，可(ke)用(yong)(yong)(yong)兩(liang)臺(tai)壓變(bian)(bian)，即測(ce)量(liang)(liang)(liang)(liang)下(xia)限(xian)(xian)一(yi)(yi)臺(tai)，測(ce)量(liang)(liang)(liang)(liang)上限(xian)(xian)一(yi)(yi)臺(tai)，它(ta)們(men)的(de)(de)(de)輸出信(xin)號可(ke)進行減(jian)法運算，測(ce)出液(ye)位(wei)，一(yi)(yi)般選用(yong)(yong)(yong)差(cha)壓變(bian)(bian)送(song)器(qi)(qi)(qi)。在(zai)容器(qi)(qi)(qi)內液(ye)位(wei)與壓力(li)(li)值不變(bian)(bian)的(de)(de)(de)情(qing)況下(xia)它(ta)還可(ke)以用(yong)(yong)(yong)來(lai)測(ce)量(liang)(liang)(liang)(liang)個質(zhi)的(de)(de)(de)密(mi)度。壓力(li)(li)變(bian)(bian)送(song)器(qi)(qi)(qi)的(de)(de)(de)測(ce)量(liang)(liang)(liang)(liang)范圍可(ke)以做的(de)(de)(de)很(hen)寬，從0開(kai)始(shi)可(ke)以到100MPa（一(yi)(yi)般情(qing)況）。