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Proceedings Paper

Opsis open-path monitor versus conventional point samplers in a field study
Author(s): Hans S. Hallstadius; Robert K. Stevens; Charles Patrick Conner
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Paper Abstract

During late summer of 1993 a field study took place in Baytown, Texas, where a comparison was made between the Opsis open-path system and conventional point sampling monitors. Simultaneous measurements of the three criteria pollutants sulfur dioxide, nitrogen dioxide, and ozone were made during a time period of a month, including data on wind speed, wind direction, and temperature. This study was made in an area with numerous major local sources of pollution. The degree of agreement between the open-path system and the point measurement system depended on the gas being measured. Ozone, which is well mixed, showed very good intercomparison whereas SO2 showed poor intercomparison from time to time. By studying the discrepancies as function of the wind direction, interesting results were obtained.

Paper Details

Date Published: 31 May 1995
PDF: 12 pages
Proc. SPIE 2365, Optical Sensing for Environmental and Process Monitoring, (31 May 1995); doi: 10.1117/12.210796
Show Author Affiliations
Hans S. Hallstadius, Opsis AB (Sweden)
Robert K. Stevens, U.S. Environmental Protection Agency (United States)
Charles Patrick Conner, ManTech Environmental Technology Inc. (United States)


Published in SPIE Proceedings Vol. 2365:
Optical Sensing for Environmental and Process Monitoring
Orman A. Simpson, Editor(s)

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