简介QN型气敏元件,是以二氧锡为主,适量掺以有用的杂质,在高温下烧结而成的多晶体,属n型材料,遇可燃性气体时,其电阻减小。QN型气敏元件在其内部丝极加热到250℃～300℃后,接触甲烷,天燃气、液化石油气、煤气、一氧化碳、烟雾、汽油、乙炔、烷类、氨类、醚类,烯类等可燃性气体时,元件阻值就会从平时的10~5Ω左右下降到10~3Ω,而且随着可 Brief introduction QN-type gas sensor, is based on dioxins, appropriate amount of doped with useful impurities, sintered at high temperature polycrystal, is an n-type material, in case of flammable gas, the resistance decreases. QN gas sensor contacts with methane, natural gas, liquefied petroleum gas, coal gas, carbon monoxide, smog, gasoline, acetylene, alkane, ammonia, ether, and alkene after its internal filament is heated to 250 ℃ ~ 300 ℃ Other flammable gas, the component resistance will drop from the usual 10 ~ 5Ω down to 10 ~ 3Ω, and with the