在各儀表中，無錫(xi)徽科特(te)測控(kong)技(ji)術有(you)限公司(si)的露(lu)點變送(song)(song)器(qi)應用廣、普(pu)遍，露(lu)點變送(song)(song)器(qi)大(da)體分為壓力露(lu)點變送(song)(song)器(qi)和差壓露(lu)點變送(song)(song)器(qi)。

　　露(lu)(lu)點(dian)變送(song)(song)器(qi)又名溫濕度(du)露(lu)(lu)點(dian)變送(song)(song)器(qi)，常用(yong)來測量壓(ya)力(li)、差壓(ya)、真空(kong)、液位、流量和(he)(he)密度(du)等。露(lu)(lu)點(dian)變送(song)(song)器(qi)有(you)(you)兩(liang)制和(he)(he)四(si)線制之(zhi)分，兩(liang)線制露(lu)(lu)點(dian)變送(song)(song)器(qi)尤多；有(you)(you)智能(neng)和(he)(he)非智能(neng)之(zhi)分，智能(neng)露(lu)(lu)點(dian)變送(song)(song)器(qi)漸多：有(you)(you)氣動和(he)(he)電動之(zhi)分，電動露(lu)(lu)點(dian)變送(song)(song)器(qi)居多；另外，按應用(yong)場合有(you)(you)本安(an)型(xing)和(he)(he)隔爆型(xing)之(zhi)分。

　　露點(dian)變(bian)(bian)送(song)器(qi)(qi)的(de)選通常根據安(an)裝條件、環境(jing)條件、儀表(biao)性能、經濟性和應用(yong)介質等方(fang)面考慮慮。實(shi)際運用(yong)中分為(wei)直接測量和間接測量；其用(yong)途有(you)過程測量、過程控制和裝置聯(lian)鎖。常見的(de)露點(dian)變(bian)(bian)送(song)器(qi)(qi)有(you)普通壓(ya)(ya)力露點(dian)變(bian)(bian)送(song)器(qi)(qi)、差(cha)壓(ya)(ya)露點(dian)變(bian)(bian)送(song)器(qi)(qi)、單法蘭露點(dian)變(bian)(bian)送(song)器(qi)(qi)、雙法蘭露點(dian)變(bian)(bian)送(song)器(qi)(qi)器(qi)(qi)、插(cha)入式(shi)法蘭露點(dian)變(bian)(bian)送(song)器(qi)(qi)等。

　　壓(ya)(ya)(ya)力(li)変送(song)器(qi)(qi)和(he)(he)差(cha)(cha)壓(ya)(ya)(ya)變送(song)器(qi)(qi)單從名詞上(shang)講測(ce)(ce)(ce)量(liang)的(de)(de)(de)是(shi)壓(ya)(ya)(ya)力(li)和(he)(he)兩(liang)個壓(ya)(ya)(ya)力(li)的(de)(de)(de)差(cha)(cha)，但(dan)它們(men)們(men)間接測(ce)(ce)(ce)量(liang)的(de)(de)(de)參數是(shi)有(you)很多(duo)的(de)(de)(de)。如壓(ya)(ya)(ya)力(li)變送(song)器(qi)(qi)，除測(ce)(ce)(ce)量(liang)壓(ya)(ya)(ya)力(li)外(wai)，它還可(ke)以測(ce)(ce)(ce)量(liang)設備內的(de)(de)(de)液(ye)(ye)位。在常壓(ya)(ya)(ya)容(rong)器(qi)(qi)測(ce)(ce)(ce)量(liang)液(ye)(ye)位時，需(xu)用一(yi)臺(tai)(tai)壓(ya)(ya)(ya)變。當(dang)測(ce)(ce)(ce)量(liang)受(shou)壓(ya)(ya)(ya)容(rong)器(qi)(qi)液(ye)(ye)位時，可(ke)用兩(liang)臺(tai)(tai)壓(ya)(ya)(ya)變，即測(ce)(ce)(ce)量(liang)下限一(yi)臺(tai)(tai)，測(ce)(ce)(ce)量(liang)上(shang)限一(yi)臺(tai)(tai)，它們(men)的(de)(de)(de)輸出信號(hao)可(ke)進行減法運算，測(ce)(ce)(ce)出液(ye)(ye)位，一(yi)般選用差(cha)(cha)壓(ya)(ya)(ya)變送(song)器(qi)(qi)。在容(rong)器(qi)(qi)內液(ye)(ye)位與壓(ya)(ya)(ya)力(li)值不變的(de)(de)(de)情況(kuang)下它還可(ke)以用來測(ce)(ce)(ce)量(liang)個質的(de)(de)(de)密度。壓(ya)(ya)(ya)力(li)變送(song)器(qi)(qi)的(de)(de)(de)測(ce)(ce)(ce)量(liang)范圍可(ke)以做的(de)(de)(de)很寬，從0開始可(ke)以到(dao)100MPa（一(yi)般情況(kuang)）。