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Gas detectors and gas analyzers utilizing spectral absorption

  • US 6,396,056 B1
  • Filed: 07/08/1999
  • Issued: 05/28/2002
  • Est. Priority Date: 07/08/1999
  • Status: Expired due to Fees
First Claim
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1. An instrument for detecting the presence of or for measuring the concentration of a gas in a large stream of other gases comprising;

  • a spectral energy beam emitter for emitting a beam of spectral energy across said large stream of gasses;

    an analyzer for receiving and analyzing said beam of spectral energy that has passed through and been converted from at least some part of said large stream of gases;

    a plurality of narrow band pass filters through which said beam of spectral energy is passed;

    an in-situ calibration audit cell for calibration across said large stream of gases, said audit cell comprising a cell having a fixed length filled with a high concentration reference gas proportioned to the gas concentration;

    whereby an in-situ calibration across said large stream of gases can be performed without removal of said analyzer.

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