OLS : Record


Main Title Preliminary Evaluation of a Modified NBS PM(10) Sampler for Indoor Particulate Measurements.
Author Howes, J. E.; Vijayakumar, R.; Doerfler, F.; Burmann, F. J.; Howard, F. S.;
CORP Author Environmental Monitoring and Services, Inc., Newbury Park, CA. ;Esoteric Systems, Inc., Newbury Park, CA.;Environmental Monitoring Systems Lab., Research Triangle Park, NC.
Year Published 1985
Report Number EPA-68-02-4084; EPA/600/4-85/057;
Stock Number PB85-247005
Subjects Air pollution; Measurements; Performance evaluation; Modifications; Air samplers; Indoor air pollution; Particulates; NBS PM10 air sampler
Library   Call Number Additional Info Location Date Modified
NTIS PB85-247005 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 40p
Abstract Modifications have been made in the prototype NBS portable sampler to overcome several design flaws. The modifications included replacement of the case, redesign of the filter holder, and addition of a motor control circuit. Results obtained in a brief performance evaluation indicate that the modified sampler yields PM10 data comparable to that obtained with a conventional ambient-type dichotomous sampler. The battery pack (six 1.25V Ni-Cd D cells) used with the modified NBS sampler provides at least 24 hours of operation at a flow rate of 6 1pm. The constant current motor control circuit added to the sampler provides a very uniform flow rate (within + or - 5%) over a 24-hour sampling period. The circuit also automatically decouples the motor when the battery output drops below a voltage that delivers a flow rate of 6 1pm. The performance of an indoor air sampler developed by Harvard University was also evaluated in this study.
Supplementary Notes Prepared in cooperation with Esoteric Systems, Inc., Newbury Park, CA.
PUB Date Free Form Aug 85
Category Codes 13B; 68A
NTIS Prices PC A03/MF A01
Primary Description 600/08
Document Type NT
Control Number 532619425
Cataloging Source NTIS/MT
Origin NTIS
Type CAT