- Author
-
Handa, T.
|
Suda, K.
|
Nagashima, T.
|
Kaneko, K.
|
Yamamura, T.
|
Takahashi, Y.
|
Suzuki, H.
|
Saito, F.
- Title
- Instrumentation for the Size Determination of Submicron Particulates Systems by Sideway Light Scattering Method and the Characteristics of Smokes from Polymerized Materials in Fire.
- Coporate
- Tokyo Univ., Japan
Hitachi Central Research Lab., Tokyo, Japan
Building Research Inst., Tokyo, Japan
- Sponsor
- National Bureau of Standards, Gaithersburg, MD
- Report
-
NBS SP 540,
- Distribution
- Available from Government Printing Office
- Book or Conf
- National Bureau of Standards. Fire Research and Safety. 3rd Joint Panel Proceedings Conference of the U.S. Japn Cooperative Program in Natural Resources (UJNR). March 13-17, 1978,
National Bureau of Standards,
Gaithersburg, MD,
Sherald, M. A., Editors,
626-711 p.,
1979
- Keywords
-
particle size distribution
- Abstract
- The handy submicron level particle counter using low output He-Ne laser (unpolarized, 8mW) has been designed for in situ measurements on the basis of the response calculations and the experimental checks on factors governing the signal to noise ratio level. The sideway light scattering system at right angle is the most available optical system in excluding the miscellaneous contributions to noise level and the primary component in enhancing the noise level comes from the carrier gas. However, the present instrument with 9-steps for channel isolation is so aligned to minimize the noise level primarily by reducing the sensing volume in terms of squeezing the beam diameter and the slit width. When necessary, it can detect the particulate down to 0.07 mu m by controling the nozzle.