采購端面熱電阻

有 端(duan)(duan)(duan)(duan)面(mian)(mian)銅(tong)(tong)電(dian)阻(zu)(zu)(zu)之(zhi)分。端(duan)(duan)(duan)(duan)面(mian)(mian)熱(re)(re)(re)(re)(re)電(dian)阻(zu)(zu)(zu)元(yuan)件由特殊處理的絲(si)材（銅(tong)(tong)或鉑絲(si)）繞(rao)制(zhi)，它們緊巾在溫度計(ji)前端(duan)(duan)(duan)(duan)，與(yu)(yu)一般軸向熱(re)(re)(re)(re)(re)電(dian)阻(zu)(zu)(zu)相比，端(duan)(duan)(duan)(duan)面(mian)(mian)熱(re)(re)(re)(re)(re)電(dian)阻(zu)(zu)(zu)能(neng)更正確和迅(xun)速地反(fan)映被測(ce)端(duan)(duan)(duan)(duan)面(mian)(mian)的實際溫度狀況，它的制(zhi)作方法很多，品(pin)種形(xing)式多樣，適合(he)于電(dian)廠汽輪機及電(dian)機軸瓦或其它機體表面(mian)(mian)測(ce)溫。有的端(duan)(duan)(duan)(duan)面(mian)(mian)熱(re)(re)(re)(re)(re)電(dian)阻(zu)(zu)(zu)安裝(zhuang)時由于它的引線與(yu)(yu)電(dian)阻(zu)(zu)(zu)元(yuan)件是相連的，所(suo)以(yi)要將引線與(yu)(yu)端(duan)(duan)(duan)(duan)面(mian)(mian)熱(re)(re)(re)(re)(re)電(dian)阻(zu)(zu)(zu)同步轉(zhuan)動，這(zhe)樣才確保(bao)端(duan)(duan)(duan)(duan)面(mian)(mian)熱(re)(re)(re)(re)(re)電(dian)阻(zu)(zu)(zu)在安裝(zhuang)中不(bu)被人為(wei)損壞，但是實際安裝(zhuang)過程中難免出現這(zhe)種情況。由于這(zhe)種情況的出現，瑞科(ke)公司加大科(ke)研力度研制(zhi)成(cheng)功特殊的端(duan)(duan)(duan)(duan)面(mian)(mian)熱(re)(re)(re)(re)(re)電(dian)阻(zu)(zu)(zu)，這(zhe)種端(duan)(duan)(duan)(duan)面(mian)(mian)熱(re)(re)(re)(re)(re)電(dian)阻(zu)(zu)(zu)在安裝(zhuang)時只(zhi)需要擰外端(duan)(duan)(duan)(duan)的螺絲(si)就可以(yi)了，不(bu)需要引線與(yu)(yu)端(duan)(duan)(duan)(duan)面(mian)(mian)熱(re)(re)(re)(re)(re)電(dian)阻(zu)(zu)(zu)同步轉(zhuan)動。

采購端面熱電阻

系統結構(gou)

（1）精通型(xing)熱電阻(zu)：工業常用(yong)熱電阻(zu)感溫元件（電阻(zu)體）的結構及特點(dian)。為消除引線電阻(zu)的影響同般采用(yong)三線制或四線制。

（2）鎧裝熱電(dian)阻：它的外徑(jing)一般為φ2~φ8mm，最小可(ke)達(da)φmm。 與普通型熱電(dian)阻相比，它有下列優點：

①體積(ji)小，內部無空氣隙，熱慣性上，測量滯后小；

②機(ji)械(xie)性能(neng)好、耐振，抗沖擊；

③能彎曲，便于安(an)裝(zhuang)

④使用壽(shou)命長。

 熱(re)(re)電(dian)(dian)(dian)阻(zu)測溫(wen)(wen)(wen)原理及材(cai)料熱(re)(re)電(dian)(dian)(dian)阻(zu)測溫(wen)(wen)(wen)是基于金(jin)屬導體的(de)(de)(de)(de)電(dian)(dian)(dian)阻(zu)值隨溫(wen)(wen)(wen)度(du)的(de)(de)(de)(de)增(zeng)加(jia)而增(zeng)加(jia)這一特性來進行溫(wen)(wen)(wen)度(du)測量的(de)(de)(de)(de)。熱(re)(re)電(dian)(dian)(dian)阻(zu)大都由純金(jin)屬材(cai)料制成，目前(qian)應用最多的(de)(de)(de)(de)是鉑和(he)銅，此(ci)外，現已開始(shi)采用鎳、錳(meng)和(he)銠等材(cai)料制造熱(re)(re)電(dian)(dian)(dian)阻(zu)。 熱(re)(re)電(dian)(dian)(dian)阻(zu)的(de)(de)(de)(de)類型(xing)，普通型(xing)熱(re)(re)電(dian)(dian)(dian)阻(zu)普通型(xing)熱(re)(re)電(dian)(dian)(dian)阻(zu)從熱(re)(re)電(dian)(dian)(dian)阻(zu)的(de)(de)(de)(de)測溫(wen)(wen)(wen)原理可知，被測溫(wen)(wen)(wen)度(du)的(de)(de)(de)(de)變化是直接通過熱(re)(re)電(dian)(dian)(dian)阻(zu)阻(zu)值的(de)(de)(de)(de)變化來測量的(de)(de)(de)(de)，因此(ci)，熱(re)(re)電(dian)(dian)(dian)阻(zu)體的(de)(de)(de)(de)引出(chu)線等各種導線電(dian)(dian)(dian)阻(zu)的(de)(de)(de)(de)變化會給(gei)溫(wen)(wen)(wen)度(du)測量帶(dai)來影響。