Gas analyzer

In a gas analyzer comprising a light source, first and second gas cells, and a light disrupter disrupting transmission of light from the light source through the first and second gas cells, the improvement comprising:

• a first lens disposed between the light source and the first gas cell;
• a second lens disposed between the light source and the second gas cell;
• a first spatial filter disposed between the light source and the first lens;
• and
• a second spatial filter disposed between the light source and the second lens;
• wherein the first and second spatial filters position light from the light source on the first and second lenses, respectively, such that the first and second lenses transmit light through the first and second gas cells, respectively, without the light contacting an interior surface of the first and second gas cells.

A gas analyzer comprising:

• a source section;
• a detector section;
• first and second gas cells coupled with the source and detector sections;
• a first window adjacent an end of the first and second gas cells proximate the source section;
• a second window adjacent an end of the first and second gas cells proximate the detector section;
• and
• a set of sealing members disposed between the first and second windows and the first and second gas cells;
• wherein the set of sealing members is formed to substantially prevent contaminants from entering the first and second gas cells when the first and second gas cells are disposed between the first and second windows and wherein the set of sealing members are further formed to allow the first and second gas cells to be removably disposed between the first and second windows.

A gas analyzer comprising:

• a housing;
• first and second gas cells disposed in the housing;
• a first air inlet portion disposed in the housing, the first air inlet portion allowing incoming air to flow into the first gas cell;
• a second air inlet portion disposed in the housing, the second air inlet portion allowing incoming air to flow into the second gas cell;
• a heat exchanger disposed in the first and second air inlet portions, the heat exchanger being operative to equilibrating a temperature of incoming air to a temperature of the housing.