Gas analyzer system

A system comprising:

• an optical source to generate an optical signal;
• a detector to measure an intensity of the optical signal after passing of the optical signal through a sample gas;
• and
• an analyzer to detect which of multiple gases are present in the sample gas based on measuring absorbance of the optical signal by the sample gas at different optical frequency bands, at least two gases of the multiple gases absorbing the optical signal in a same frequency band.

A computer program product including a computer-readable media having instructions stored thereon for processing data information, such that the instructions, when carried out by one or more processing devices, enables the one or more processing device to perform operations of:

• generating an optical signal;
• at each of multiple frequency bands, measuring an intensity of the optical signal after passing of the optical signal through a sample gas potentially having multiple types of gases that absorb the optical signal in a same frequency band;
• and
• detecting concentrations of the multiple types of gases in the sample gas based on absorption of the optical signal at the multiple frequency bands.