適用范圍
煙霧(wu)傳感(gan)器適用(yong)于煤礦井(jing)下(xia)具有瓦斯(si)、煤塵爆炸(zha)危險的(de)場所但其供(gong)電電源必須采用(yong)本質安型電源供(gong)電,可應用(yong)于煙霧(wu)超(chao)限報警、防滅火煙霧(wu)信號提(ti)供(gong)及煙霧(wu)超(chao)限監測。
工作(zuo)原理
煙霧傳(chuan)感(gan)器是(shi)由專用煙霧傳(chuan)感(gan)器MQ-214構成(cheng)的高(gao)精(jing)度(du)可(ke)燃氣(qi)體/電(dian)(dian)壓(ya)轉換器、V/V轉換、電(dian)(dian)壓(ya)比(bi)較(jiao)器、可(ke)控(kong)報警及(ji)(ji)輸(shu)出(chu)電(dian)(dian)路(lu)等組成(cheng);MQ-214傳感器輸(shu)出(chu)煙霧(wu)信號成(cheng)正比(bi)的電(dian)(dian)壓(ya)信號,經電(dian)(dian)壓(ya)比(bi)較(jiao)器及(ji)(ji)數(shu)字電(dian)(dian)路(lu)處(chu)理輸(shu)出(chu)煙霧(wu)超限(xian)報警信號。
主(zhu)要技術參(can)數(shu)
1.防爆型(xing)式(shi):礦用本安型(xing),防爆標志(zhi):Exib IMb;
2. 本安(an)參(can)數Ui: 13.7VDC;Ii:85mA;Ci:0.2uF;Li:0uH;
3. 額(e)定工作(zuo)電壓(ya): 12VDC;
4. 工作電流: ≤85mA;
5. 輸出信號:高電平≥6.0V,低(di)電平≤0.5V;
6. 煙霧傳感器響應時間:≤15s;
7. 煙霧報警值(zhi):5%obs/m;
8. 電氣間隙≥2mm,爬電距(ju)離≥2mm。
9. 外型(xing)尺(chi)寸(cun): φ132mm×159mm;