鎧裝多點熱電偶具有能(neng)彎曲、耐高壓(ya)、熱(re)(re)響(xiang)應時間(jian)快和堅固耐用(yong)等許(xu)多優點，它(ta)和工業用(yong)裝(zhuang)配(pei)式(shi)(shi)熱(re)(re)電偶(ou)一樣，作(zuo)為(wei)測量溫度的傳感(gan)器，通(tong)常和顯示儀(yi)表、記(ji)錄儀(yi)表和電子調節器配(pei)套(tao)使用(yong)，同時，亦可(ke)以(yi)作(zuo)為(wei)裝(zhuang)配(pei)式(shi)(shi)熱(re)(re)電偶(ou)的感(gan)溫元件。它(ta)可(ke)以(yi)直接測量各種生(sheng)產(chan)過程中從0℃~800℃范(fan)圍內的液體(ti)、蒸汽和其氣體(ti)介質(zhi)以(yi)及固體(ti)表面的溫度。與裝(zhuang)配(pei)式(shi)(shi)熱(re)(re)電偶(ou)相比(bi)，鎧裝(zhuang)熱(re)(re)電偶(ou)具有可(ke)彎曲、耐高壓(ya)、熱(re)(re)響(xiang)應時間(jian)短和堅固耐用(yong)等優點。

　　鎧裝多點熱電偶工作原理

　　鎧裝多點熱電偶是兩(liang)種不同成(cheng)份的(de)導體(ti)(ti)(ti)兩(liang)端(duan)(duan)經焊接(jie)(jie)，形成(cheng)回路(lu)，直接(jie)(jie)測(ce)溫(wen)端(duan)(duan)叫(jiao)工(gong)作端(duan)(duan)，接(jie)(jie)線端(duan)(duan)子端(duan)(duan)叫(jiao)冷端(duan)(duan)，也稱參比端(duan)(duan)。當(dang)工(gong)作端(duan)(duan)和參比端(duan)(duan)存在溫(wen)差(cha)時，就會在回路(lu)中產(chan)生熱(re)(re)電(dian)(dian)(dian)流(liu)，接(jie)(jie)上(shang)顯(xian)示儀表(biao)，儀表(biao)上(shang)就會指示出熱(re)(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)所產(chan)生的(de)熱(re)(re)電(dian)(dian)(dian)動(dong)勢(shi)的(de)對應溫(wen)度(du)值。鎧裝熱(re)(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)的(de)熱(re)(re)電(dian)(dian)(dian)動(dong)勢(shi)將(jiang)隨著(zhu)測(ce)量端(duan)(duan)溫(wen)度(du)升高(gao)而增長(chang)，熱(re)(re)電(dian)(dian)(dian)動(dong)勢(shi)的(de)大(da)小只(zhi)和熱(re)(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)導體(ti)(ti)(ti)材質以及兩(liang)端(duan)(duan)溫(wen)差(cha)有關，和熱(re)(re)電(dian)(dian)(dian)極(ji)的(de)長(chang)度(du)、直徑無關。鎧裝熱(re)(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)的(de)結(jie)構原理是，是由導體(ti)(ti)(ti)、高(gao)絕(jue)緣氧化鎂、外(wai)套1Cr18Ni9Ti不銹鋼保護管，經多次一體(ti)(ti)(ti)拉(la)制而成(cheng)。鎧裝熱(re)(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)產(chan)品主要(yao)由接(jie)(jie)線盒、接(jie)(jie)線端(duan)(duan)子和鎧裝熱(re)(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)組成(cheng)基(ji)本結(jie)構，并(bing)配以各種安裝固定(ding)裝置組成(cheng)。

　　鎧裝多點熱電偶特點

　　鎧裝多點熱電偶是(shi)溫(wen)(wen)度(du)(du)測量中(zhong)應(ying)(ying)用zui廣泛的(de)(de)溫(wen)(wen)度(du)(du)器件，他(ta)的(de)(de)主(zhu)要特點就(jiu)是(shi)測溫(wen)(wen)范(fan)圍寬，性能比較穩(wen)定(ding)，同(tong)(tong)(tong)(tong)時結構簡單(dan)，動態(tai)響應(ying)(ying)好，更能夠遠(yuan)傳4-20mA電(dian)(dian)(dian)(dian)信(xin)號，便于(yu)(yu)自動控制和(he)集中(zhong)控制。熱(re)電(dian)(dian)(dian)(dian)偶的(de)(de)測溫(wen)(wen)原理是(shi)基于(yu)(yu)熱(re)電(dian)(dian)(dian)(dian)效應(ying)(ying)。將兩(liang)(liang)種不(bu)(bu)同(tong)(tong)(tong)(tong)的(de)(de)導(dao)(dao)體(ti)或半導(dao)(dao)體(ti)連接(jie)(jie)成(cheng)閉合回路(lu)，當兩(liang)(liang)個(ge)接(jie)(jie)點處的(de)(de)溫(wen)(wen)度(du)(du)不(bu)(bu)同(tong)(tong)(tong)(tong)時，回路(lu)中(zhong)將產(chan)(chan)生(sheng)熱(re)電(dian)(dian)(dian)(dian)勢(shi)(shi)(shi)(shi)，這種現象稱為熱(re)電(dian)(dian)(dian)(dian)效應(ying)(ying)，又稱為塞(sai)貝克效應(ying)(ying)。閉合回路(lu)中(zhong)產(chan)(chan)生(sheng)的(de)(de)熱(re)電(dian)(dian)(dian)(dian)勢(shi)(shi)(shi)(shi)有(you)兩(liang)(liang)種電(dian)(dian)(dian)(dian)勢(shi)(shi)(shi)(shi)組成(cheng);溫(wen)(wen)差(cha)電(dian)(dian)(dian)(dian)勢(shi)(shi)(shi)(shi)和(he)接(jie)(jie)觸(chu)電(dian)(dian)(dian)(dian)勢(shi)(shi)(shi)(shi)。溫(wen)(wen)差(cha)電(dian)(dian)(dian)(dian)勢(shi)(shi)(shi)(shi)是(shi)指同(tong)(tong)(tong)(tong)一導(dao)(dao)體(ti)的(de)(de)兩(liang)(liang)端(duan)因溫(wen)(wen)度(du)(du)不(bu)(bu)同(tong)(tong)(tong)(tong)而產(chan)(chan)生(sheng)的(de)(de)電(dian)(dian)(dian)(dian)勢(shi)(shi)(shi)(shi)，不(bu)(bu)同(tong)(tong)(tong)(tong)的(de)(de)導(dao)(dao)體(ti)具有(you)不(bu)(bu)同(tong)(tong)(tong)(tong)的(de)(de)電(dian)(dian)(dian)(dian)子密度(du)(du)，所以他(ta)們(men)產(chan)(chan)生(sheng)的(de)(de)電(dian)(dian)(dian)(dian)勢(shi)(shi)(shi)(shi)也不(bu)(bu)相(xiang)同(tong)(tong)(tong)(tong)，而接(jie)(jie)觸(chu)電(dian)(dian)(dian)(dian)勢(shi)(shi)(shi)(shi)顧(gu)名思義就(jiu)是(shi)指兩(liang)(liang)種不(bu)(bu)同(tong)(tong)(tong)(tong)的(de)(de)導(dao)(dao)體(ti)相(xiang)接(jie)(jie)觸(chu)時，因為他(ta)們(men)的(de)(de)電(dian)(dian)(dian)(dian)子密度(du)(du)不(bu)(bu)同(tong)(tong)(tong)(tong)所以產(chan)(chan)生(sheng)一定(ding)的(de)(de)電(dian)(dian)(dian)(dian)子擴散，當他(ta)們(men)達(da)到一定(ding)的(de)(de)平衡(heng)后所形成(cheng)的(de)(de)電(dian)(dian)(dian)(dian)勢(shi)(shi)(shi)(shi)，接(jie)(jie)觸(chu)電(dian)(dian)(dian)(dian)勢(shi)(shi)(shi)(shi)的(de)(de)大小取決(jue)于(yu)(yu)兩(liang)(liang)種不(bu)(bu)同(tong)(tong)(tong)(tong)導(dao)(dao)體(ti)的(de)(de)材料(liao)性質以及(ji)他(ta)們(men)接(jie)(jie)觸(chu)點的(de)(de)溫(wen)(wen)度(du)(du)。

　　上應用的熱(re)電偶(ou)具(ju)有一個(ge)標(biao)準規(gui)范，上規(gui)定(ding)熱(re)電偶(ou)分(fen)為(wei)(wei)八個(ge)不同的分(fen)度(du)(du)(du)，分(fen)別(bie)為(wei)(wei)B，R，S，K，N，E，J和T，其測(ce)量溫度(du)(du)(du)的zui低可測(ce)零下270攝氏(shi)(shi)度(du)(du)(du)，zui高可達1800攝氏(shi)(shi)度(du)(du)(du)，其中B，R，S屬于(yu)鉑系列(lie)的熱(re)