煤氣檢測儀是一種(zhong)檢(jian)(jian)測煤(mei)(mei)氣可(ke)燃氣體(ti)泄漏(lou)濃度的一種(zhong)重要的安防設備，煤(mei)(mei)氣氣體(ti)檢(jian)(jian)測儀是一種(zhong)便(bian)攜式氣體(ti)檢(jian)(jian)測儀，它的主要特點是具有(you)操(cao)作(zuo)方便(bian)，讀(du)取直觀，工(gong)作(zuo)可(ke)靠(kao)、體(ti)積小、質量(liang)輕，維修方便(bian)、可(ke)以隨時(shi)隨地進行檢(jian)(jian)測，廣泛應用于燃氣、石油、化工(gong)、煤(mei)(mei)炭、電力、制藥(yao)、冶金(jin)、焦化等行業。

    煤氣檢測儀的(de)(de)(de)(de)(de)工(gong)(gong)作(zuo)原(yuan)理(li)(li)(li)是采用熱(re)催(cui)(cui)化(hua)(hua)(hua)(hua)(hua)工(gong)(gong)作(zuo)原(yuan)理(li)(li)(li)。 熱(re)催(cui)(cui)化(hua)(hua)(hua)(hua)(hua)式(熱(re)效)式煤(mei)氣(qi)(qi)(qi)檢(jian)(jian)(jian)測(ce)(ce)(ce)(ce)儀是由傳感(gan)器(qi)(qi)、電(dian)(dian)(dian)(dian)(dian)(dian)源、放大電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)、警(jing)報電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)、顯(xian)(xian)示電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)等(deng)部分構成(cheng)的(de)(de)(de)(de)(de)，其(qi)中(zhong)傳感(gan)器(qi)(qi)(也稱元(yuan)件)是儀器(qi)(qi)的(de)(de)(de)(de)(de)主要(yao)部分，它直接(jie)與環境中(zhong)的(de)(de)(de)(de)(de)煤(mei)氣(qi)(qi)(qi)接(jie)觸，反應(ying)，把(ba)煤(mei)氣(qi)(qi)(qi)的(de)(de)(de)(de)(de)濃度值(zhi)(zhi)(zhi)變成(cheng)電(dian)(dian)(dian)(dian)(dian)(dian)量，由放大電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)放大后送給顯(xian)(xian)示和(he)警(jing)報電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)。熱(re)催(cui)(cui)化(hua)(hua)(hua)(hua)(hua)元(yuan)件是用鉑(bo)絲按一(yi)(yi)定(ding)(ding)的(de)(de)(de)(de)(de)幾何參數繞制的(de)(de)(de)(de)(de)螺旋圈(quan)、外部涂(tu)以(yi)氧化(hua)(hua)(hua)(hua)(hua)鋁(lv)漿并經煅(duan)燒而(er)成(cheng)的(de)(de)(de)(de)(de)一(yi)(yi)定(ding)(ding)形狀的(de)(de)(de)(de)(de)耐(nai)溫多(duo)孔(kong)載(zai)體。其(qi)表(biao)面(mian)(mian)(mian)上(shang)浸(jin)漬有一(yi)(yi)層鉑(bo)、鈀催(cui)(cui)化(hua)(hua)(hua)(hua)(hua)劑。因(yin)為(wei)這(zhe)(zhe)種檢(jian)(jian)(jian)測(ce)(ce)(ce)(ce)元(yuan)件表(biao)面(mian)(mian)(mian)呈黑(hei)(hei)(hei)色(se)，所以(yi)又稱黑(hei)(hei)(hei)元(yuan)件，除黑(hei)(hei)(hei)元(yuan)件外，在儀器(qi)(qi)的(de)(de)(de)(de)(de)甲(jia)烷檢(jian)(jian)(jian)測(ce)(ce)(ce)(ce)室中(zhong)，還有一(yi)(yi)個(ge)(ge)(ge)與檢(jian)(jian)(jian)測(ce)(ce)(ce)(ce)元(yuan)件構造相(xiang)同(tong)，但表(biao)面(mian)(mian)(mian)沒有涂(tu)催(cui)(cui)化(hua)(hua)(hua)(hua)(hua)劑的(de)(de)(de)(de)(de)補償元(yuan)件(稱白元(yuan)件)。黑(hei)(hei)(hei)白兩個(ge)(ge)(ge)元(yuan)件分別接(jie)在一(yi)(yi)個(ge)(ge)(ge)電(dian)(dian)(dian)(dian)(dian)(dian)橋(qiao)(qiao)(qiao)的(de)(de)(de)(de)(de)兩個(ge)(ge)(ge)相(xiang)鄰橋(qiao)(qiao)(qiao)臂上(shang)，而(er)電(dian)(dian)(dian)(dian)(dian)(dian)橋(qiao)(qiao)(qiao)的(de)(de)(de)(de)(de)另外兩個(ge)(ge)(ge)橋(qiao)(qiao)(qiao)臂分別接(jie)入適當(dang)(dang)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)阻，它們共同(tong)組成(cheng)的(de)(de)(de)(de)(de)測(ce)(ce)(ce)(ce)量電(dian)(dian)(dian)(dian)(dian)(dian)橋(qiao)(qiao)(qiao)。熱(re)催(cui)(cui)化(hua)(hua)(hua)(hua)(hua)甲(jia)烷傳感(gan)器(qi)(qi)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)原(yuan)理(li)(li)(li)圖 當(dang)(dang)一(yi)(yi)定(ding)(ding)的(de)(de)(de)(de)(de)工(gong)(gong)作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)通過(guo)檢(jian)(jian)(jian)測(ce)(ce)(ce)(ce)工(gong)(gong)作(zuo) 時， (黑(hei)(hei)(hei)元(yuan)件) 其(qi)表(biao)面(mian)(mian)(mian)即被(bei)加(jia)熱(re)到一(yi)(yi)定(ding)(ding)的(de)(de)(de)(de)(de)溫度，而(er)這(zhe)(zhe)時當(dang)(dang)含有煤(mei)氣(qi)(qi)(qi)的(de)(de)(de)(de)(de)空氣(qi)(qi)(qi)接(jie)觸到檢(jian)(jian)(jian)測(ce)(ce)(ce)(ce)元(yuan)件表(biao)面(mian)(mian)(mian)時，便被(bei)催(cui)(cui)化(hua)(hua)(hua)(hua)(hua)燃燒，燃燒放出的(de)(de)(de)(de)(de)熱(re)量又反過(guo)來(lai)進一(yi)(yi)步使元(yuan)件的(de)(de)(de)(de)(de)溫度升高，使鉑(bo)絲的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)阻值(zhi)(zhi)(zhi)明顯(xian)(xian)增加(jia)，于是電(dian)(dian)(dian)(dian)(dian)(dian)橋(qiao)(qiao)(qiao)就(jiu)失去平衡，輸出一(yi)(yi)定(ding)(ding)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)。在煤(mei)氣(qi)(qi)(qi)濃度低(di)于 amp 的(de)(de)(de)(de)(de)情況下，電(dian)(dian)(dian)(dian)(dian)(dian)橋(qiao)(qiao)(qiao)輸出的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)與瓦(wa)斯(si)濃度基(ji)本上(shang)呈直線關(guan)系，因(yin)此可以(yi)根據測(ce)(ce)(ce)(ce)量電(dian)(dian)(dian)(dian)(dian)(dian)橋(qiao)(qiao)(qiao)輸出電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)的(de)(de)(de)(de)(de)大小測(ce)(ce)(ce)(ce)算出煤(mei)氣(qi)(qi)(qi)的(de)(de)(de)(de)(de)數值(zhi)(zhi)(zhi);當(dang)(dang)煤(mei)氣(qi)(qi)(qi)濃度超過(guo) amp 時，輸出電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)就(jiu)不再與煤(mei)氣(qi)(qi)(qi)濃度成(cheng)正(zheng)比關(guan)系。所以(yi)按這(zhe)(zhe)種原(yuan)理(li)(li)(li)做成(cheng)的(de)(de)(de)(de)(de)瓦(wa)斯(si)檢(jian)(jian)(jian)定(ding)(ding)器(qi)(qi)只能測(ce)(ce)(ce)(ce)低(di)濃度瓦(wa)斯(si)。

    煤氣檢測儀是可對生產與使用煤氣的(de)現場的(de)進行檢測，是有關行業安全管(guan)理(li)人(ren)員及(ji)檢查維修人(ren)員的(de)必備安全儀器。