据一九七一年七月《仪器实践》报道:国外一矿井安全研究公司发明了一种新型的气体敏感元件,目前还在进一步研究改进中。它的根据是:许多半导体金属氧化物的表面吸收气体和气体发生反应后,其电导率会产生变化这一原理。选择适当的半导体材料和它的工作条件,便可以用这种敏感元件检测出气体的总分布情况。敏感元件被放置在一个标准的甲烷检测器的“小球”里,这小球“掺”有氧化锌,并置于两平行的铂丝之间。铂丝直径为25μ,相隔50μ。此氧化物小球掺铂后改善了它的电特性, According to the “Instrument Practice” in July 1971, a new type of gas-sensing element was invented by a mine safety research company abroad and is still under further improvement. It is based on the principle that the surface of many semiconducting metal oxides absorbs changes in the conductivity of gas and gas when they react. Select the appropriate semiconductor materials and its working conditions, you can use this sensor to detect the total gas distribution. The sensing element is placed in a “globule” of a standard methane detector that is “doped” with zinc oxide and placed between two parallel platinum wires. Platinum wire diameter of 25μ, separated by 50μ. This oxide ball with platinum to improve its electrical properties,