Record Display for the EPA National Library Catalog

RECORD NUMBER: 2 OF 22

OLS Field Name OLS Field Data
Main Title Calibration and Performance Evaluation of a Single-Wavelength Transmissometer for Monitoring Particulate Mass Concentration of Emissions from Stationary Sources.
Author Uthe, Edward E. ;
CORP Author SRI International, Menlo Park, CA.;Environmental Protection Agency, Washington, DC. Div. of Stationary Source Enforcement.
Year Published 1978
Report Number EPA-68-01-4137; SRI-5828;
Stock Number PB-293 769
Additional Subjects Gas detectors ; Particles ; Transmissometers ; Air pollution ; Design criteria ; Performance evaluation ; Mass ; Aerosols ; Gas analysis ; Combustion products ; Industrial wastes ; Chemical analysis ; Concentration(Composition) ; Particle size ; Laboratory equipment ; Calibrating ; Fly ash ; Air pollution detection ; Infrared transmissometers ; Stationary sources
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB-293 769 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 38p
Abstract
This experimental study investigated the validity of using a single-wavelength infrared transmissometer to measure mass concentration of particulate emissions from stationary sources. Previous data and theory have indicated that an optimum wavelength region (3 to 4 micrometers) exists for relating aerosol extinction to mass concentration, independent of size of the scattering particles. Results show that the extinction-to-mass concentration ratio for a given aerosol type is dependent on particle size at the visible wavelength but nearly independent of particle size at the infrared wavelength. Therefore, the infrared transmissometer is an eminently suitable instrument for monitoring mass concentration of particulate emissions with uncontrolled particle sizes. Moreover, the results obtained for the different particle types indicate that this transmissometer can provide estimates of particulate volume concentration that are nearly independent of particle shape, composition, or size.