A convenient method for monitoring of concentration of gaseous methane by application of the principle of two-beam interference is studied. The result of interference can be analysed automstically.

• 摘要利用光的干涉原理给出了监测甲烷气体浓度的一种方法。该方法既简单又方便，而且便于实现条纹计算的自动化处理。