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Apparatus and method for simultaneous measurement of carbon dioxide and water

  • US 5,457,320 A
  • Filed: 07/25/1994
  • Issued: 10/10/1995
  • Est. Priority Date: 03/15/1991
  • Status: Expired due to Term
First Claim
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1. A gas analyzing system, comprising:

  • first and second light sources;

    a reference flow cell and a sample flow cell;

    first and second detecting means for detecting light transmitted from a corresponding one of said first and second light sources through said reference flow cell and through said sample flow cell and generating first and second signals representing each of said light transmitted through said reference flow cell and light transmitted through said sample flow cell;

    means for receiving said reference and sample signals;

    said reference and sample flow cells each including a plurality of mirrors wherein light is reflected through multiple paths in said reference and sample flow cells;

    means for supplying carbon dioxide through a capillary restrictor tube;

    means for heating the tube to change the viscosity of the carbon dioxide wherein the flow rate of the carbon dioxide is controlled; and

    means for supplying the carbon dioxide to a diverter valve, wherein a selected proportion of the carbon dioxide is diverted and the remainder applied to the gas analyzing system.

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