Gas analyzer and gas analyzing method

A gas analyzer comprising:

• at least one cavity, with a partition plate provided along a central axis of the cavity to divide the cavity into a reference gas chamber and a measurement gas chamber;
• a light source module disposed at one end of the cavity;
• and
• a micro-flow infrared gas detection device configured to detect intensity of light emitted by the light source module and passing through the cavity, and arranged at the other end of the cavity;
• wherein the micro-flow infrared gas detection device comprises a front gas chamber, a rear gas chamber, a micro-flow infrared sensor, and a water adjustment device for eliminating the influence of moisture;
• wherein the water adjustment device comprises a water adjustment valve, a water adjustment buffer gas chamber, and a connection pipe for connecting the water adjustment buffer gas chamber and the front and rear gas chambers;
• and
• wherein the front gas chamber, the rear gas chamber, the water adjustment valve, and the water adjustment buffer gas chamber are sequentially arranged along the propagation direction of the light emitted by the light source module.