该产品应用光干涉原理，可迅速、准确地测定煤矿井下环境中的ch4和co2有害气体。具有結构紧凑、操作方便、性能稳定、测量准确、使用寿命长等优点。

The application of light interference principle, can be rapid, accurate determination of coal of mine underground environment of methane and carbon dioxide in the harmful gases. Has the advantages of compact structure, convenient operation, stable performance, accurate measurement, long service life etc