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Optical fluid analyzer

  • US 4,306,152 A
  • Filed: 07/23/1979
  • Issued: 12/15/1981
  • Est. Priority Date: 07/23/1979
  • Status: Expired due to Term
First Claim
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1. An optical fluid analyzer, comprising:

  • a sample chamber for receiving a fluid sample;

    optical means for providing an optical signal of the concentration in the fluid of a selected constituant of the fluid in the sample chamber on a background from the other constituants of the fluid;

    neutral channel processing means for converting the optical signal into an electrical signal at least approximating the background portion of the optical signal;

    measurement channel processing means for converting the optical signal into an electrical signal of the concentration of the selected constituant and the background; and

    output means combining the electrical signals for subtracting the neutral channel signal at least approximating the background from the measurement channel signal of concentration and background, whereby at least much of the background portion of the signal is removed from the combined signal for more accurately extracting the concentration-indicating signal from the combined signal is further electrical signal processing.

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