- Author
-
Bukowski, R. W.
|
Mulholland, G. W.
- Title
- Smoke Detector Design and Smoke Properties. Final Report.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Report
-
NBS TN 973,
November 1978,
51 p.
- Distribution
- Available from National Technical Information Service
- Book or Conf
- National Bureau of Standards. Fire Research and Safety. 3rd Joint Panel Proceedings Conference of the U.S. Japan Cooperative Program in Natural Resources (UJNR). March 13-17, 1978,
National Bureau of Standards,
Gaithersburg, MD,
Sherald, M. A., Editors,
1-45 p.,
1979
- Keywords
-
aerosol generators
|
fire detectors
|
ionization detectors
|
light scattering detectors
|
particle size distribution
|
smoke
|
smoke detectors
- Abstract
- The importance of a reference photometer and reference ionization detector in improving the reliability of smoke detectors is discussed. Recent developments in smoke detector technology are highlighted and theoretical as well as practical experience in regard to detector performance is summarized. Comparison of the theoretically predicted resonse of smoke detectors as a function of particle size with measured values is given. A monodisperse aerosol generator, and electrical aerosol analyzer with a size sensitivity from 0.01 to 1 mu m, and an optical particle counter are described. The size distribution, mass and number concentration, optical density, and coagulation frequency for smoke from burning heptane and smoldering cotton lamp wick are presented. It is shown that a Junge type size distribution provides a good fit to the measured size distribution for both fresh and aged smoke.