00000nam 2200000zi 4500 9.927895 CaOODSP 20230928155359 m o d f cr |n||||||||| 230928e198902uuabcad ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn-ab DR52-6/17-1989E-PDF Ho, Jim, author. Design of a chamber for CBW aerosol studies with relative humidity and particle concentration control (U) / by J. Ho. Design of a chamber for CBW aerosol studies with relative humidity and particle concentration control Ralston, Alberta : Defence Research Establishment Suffield, February 1989. 1 online resource (14, [10] pages) : illustrations, charts text txt rdacontent computer c rdamedia online resource cr rdacarrier Suffield memorandum ; no. 1271 "Project No. 351SQ"--title page. Digitized edition from print [produced by Defence Research and Development Canada]. Includes bibliographical references (pages 12-13). "An aerosol generating system was integrated into a large chamber to regulate three experimental conditions, temperature, relative humidity (RH) and particle concentration during aerosol studies. A commercial heating and cooling unit was used to control temperature. Control of RH was effected by a polymer-based sensing mechanism coupled to a fogging device. Aerosol particle size and numbers were monitored and controlled by a microcomputer-driven detector coupled to an aerosol generator. The system was able to provide precise and reproducible environmental conditions conducive to aerosol studies. Aerosol concentration control was demonstrated over a range of concentrations suitable for different requirements. Under these conditions, a BW simulant aerosol was stable in terms of viability for an extended period of time. As an illustration of the system's potential application, it was used to demonstrate sampling characteristic similarities between a glass fiber filter and a glass impinger. With the features described the system has significant utility in aerosol studies involving threat detection and protection. This system is easily adapted to drive a dry powder disseminator to generate different CBW simulant aerosols. A Canadian patent (No. 1,222,300) has been awarded to part of the system"--abstract. Aerosols Research Equipment and supplies Design and construction. Biological weapons Research. Chemical agents (Munitions) Research. Aérosols Recherche Appareils et matériel Conception et construction. Armes biologiques Recherche. Agents chimiques (Munitions) Recherche. Defence Research Establishment Suffield, issuing body. Canada. Department of National Defence, issuing body. Suffield memorandum ; no. 1271. (CaOODSP)9.870467 PDF 848 KB https://publications.gc.ca/collections/collection_2023/rddc-drdc/DR52-6-17-1989-eng.pdf SM 1271 ; DRES-M-1271