Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Modification of Optical Instruments for In-Stack Monitoring of Particle Size.
Author Wertheimer, A. L. ;
CORP Author Leeds and Northrup Co., North Wales, PA.;Environmental Protection Agency, Research Triangle Park, NC. Office of Research and Development.
Year Published 1981
Report Number EPA-600/2-81-096; EPA-68-02-3253;
Stock Number PB81-213373
Additional Subjects Air pollution ; Optical measuring instruments ; Particle size ; Monitoring ; Revision ; Field tests ; Electric power plants ; Industrial wastes ; Combustion products ; Light scattering ; Coal fired power plants ; Air pollution detection
Library Call Number Additional Info Location Last
NTIS  PB81-213373 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 46p
A light scattering instrument for in-situ measurements of particles in the 0.2 to 20 micrometer diameter size range is described, and field test results are presented. The instrument is a modified version of an earlier prototype. The upper limit of the size response has been extended from 10 to 20 micrometers, and several component and packaging changes have been incorporated to make the unit more suited to stack particulate emission survey applications. The completed instrument was tested at a coal-fired electric power generating facility. During the test a cascade impactor was used as a referee device and both instruments were run side by side in the outlet duct of the electrostatic precipitator. Results show an excellent correlation between the two instruments with regard to the identification of a 1 micrometers diameter peak in the particle size distribution. A second peak around 20 micrometers was defined by the optical instrument, but could not conclusively be confirmed through the impactor data. The optical instrument handled well during the field test.