Measurement of Oxygen Concentration Using Laser Diode Spectroscopy

Laser Spectroscopy provides a non-intrusive method for measuring the concentration of a species in a sample. This paper is part of the development of employing laser spectroscopy techniques outside of a lab setting. Monitoring the presence of gaseous oxygen within a fuel tank is of great importance due to the volatility of the fuel/oxygen mixture and the threat it creates to the area surrounding the fuel tank. A technique using absorption spectroscopy to monitor the concentration of oxygen within the tank has been developed. Light from a laser diode is sent through a test cell containing an unknown concentration of oxygen. Oxygen molecules absorb some of the light and a photodiode measures the amount of light that passes through the cell. A correlation between the amount of light through the test cell and the oxygen concentrations is obtained and compared with measured concentrations. It was found that there was a measurable difference in output from the photodiode when the concentration of oxygen was changed within the test cell. The laser diode system effectively monitors the oxygen concentration in real-time in the test cell and provides a simple and low-cost alternative to standard oxygen analyzers.


  • English

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 483-493
  • Monograph Title: Safety and Security Engineering

Subject/Index Terms

Filing Info

  • Accession Number: 01007137
  • Record Type: Publication
  • ISBN: 1845640195
  • Files: TRIS
  • Created Date: Nov 11 2005 2:15PM