NIST Time|NIST Home|About NIST|Contact NIST

HomeAll Years:AuthorKeywordTitle2005-2010:AuthorKeywordTitle

Smoke Measurements in Large and Small Scale Fire Testing. Final Report.


pdf icon Smoke Measurements in Large and Small Scale Fire Testing. Final Report. (7724 K)
Bukowski, R. W.

NBSIR 78-1502; 35 p. October 1978.

Available from:

National Technical Information Service (NTIS), Technology Administration, U.S. Department of Commerce, Springfield, VA 22161.
Telephone: 1-800-553-6847 or 703-605-6000;
Fax: 703-605-6900; Rush Service (Telephone Orders Only) 800-553-6847;
Website: http://www.ntis.gov
Order number: PB-287870

Keywords:

fire tests; ionization chamber detectors; light extinction; light scattering; smoke measurement

Abstract:

The extinction beam photometer is the most widely used instrument for taking smoke measurements in fire testing. Most existing designs were found to be inaccurate and unreliable for measurements where smoke detection performance is evaluated due to the low levels of smoke present at activation. Accordingly, a new extinction beam photometer design was developed which will provide the stability and accuracy necessary for these measurements. The paper describes the new design and proposes its adoption as an industry standard. The paper also discusses the need for a reference ionization chamber instrument and a reference measurement which relates to gas sensing fire detectors.