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GAS DETECTOR UNIT

  • US 3,832,548 A
  • Filed: 10/18/1972
  • Issued: 08/27/1974
  • Est. Priority Date: 10/18/1972
  • Status: Expired due to Term
First Claim
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1. A detecting and measuring device for detecting the presence or absence of, and quantitatively measuring for a plurality of gases in a gaseous medium comprising in combination a single infrared source, a single sample cell for retaining a sample aligned to receive IR waves in a single path from said source, filter means having a plurality of positions where only IR waves of select wavelength pass, said filter means aligned to receive IR waves in said single path from said source;

  • IR detector means aligned to receive IR waves passing through said filter means and sample cell, and means for moving said filter to a first predetermined position for detecting a first gas and then to a predetermined reference position to quantitatively determine the amount of detected gas in said sample cell, and thereafter moving said filter through a plurality of predetermined positions on said filter means to detect and quantitatively measure for a plurality of gases in said sample cell, said moving means including means for stopping said filter means at each position; and

    readout means for the gas and concentration of said gas.

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