Diagnostic system for measuring temperature, pressure, CO2 concentration and H2O concentration in a fluid stream

A system for determining the concentration of CO2 in a complex fluid stream, the system comprising:

• a first laser light source that is coupled to a first end of a first pitch optic cable, the first laser light source being a swept-λ laser configured to produce light output over a sweep range that includes a region having a significant absorption feature of CO2 and at least one region of substantially zero absorption;
• a second laser light source coupled to a first end of a second pitch optic cable, the second laser light source configured to produce light output that includes a region having a significant absorption feature of H2O;
• a lens disposed proximate a second end of each of the first and second pitch optic cables for directing the first and second lights through a sampling chamber to a mirror;
• a first catch optic cable having a second end disposed proximate said lens for receiving light output from said first laser light source that is reflected from said mirror;
• a second catch optic cable having a second end disposed proximate said lens for receiving light output from said second laser light source that is reflected from said mirror;
• a first detector affixed to a first end of said first catch optic cable, said first detector providing a first output signal that is representative of light intensity across said sweep range;
• a second detector affixed to a first end of said second catch optic cable, said second detector providing a second output signal that is representative of light intensity at the H2O absorption region;
• and
• a processor coupled to said first and said second detectors, said processor configured to determine the concentration of CO2 as a function of said first and said second output signals.