A diode laser system for long-path,automatic monitoring of SO2 |
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| Authors: | E. Max S. T. Eng |
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| Affiliation: | (1) Department of Electrical Measurements, Chalmers University of Technology, Göteborg, Sweden |
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| Abstract: | A diode laser system for automatic monitoring of SO2 along a 60 m atmospheric path is reported. The laser is wavelength modulated and is used to obtain i.r. absorption spectra from the measurement path. These spectra are automatically correlated with reference spectra obtained simultaneously from a calibration cell. The minimum detectable SO2 concentration is at present around 100 ppb. |
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