Particulate matter concentration measuring apparatus

Details Particulate matter concentration measuring apparatus Particulate matter concentration measuring apparatus

2007-01-09

2007-01-09

Cygan, Michael (Department: 2855)

Measuring and testing

Gas analysis

Solid content of gas

C073S028050, C055S354000

Reexamination Certificate

active

11119123

ABSTRACT:
A highly sensitive particulate matter concentration measuring apparatus for measuring a concentration of particulate matter in a sample gas collected in a collecting region formed on a collecting medium, the collecting region being formed by drawing the sample gas through a cross-sectional area of the collecting medium, the collecting medium is a filter tape that includes a porous film made of a fluorine resin and a reinforcing layer provided on the porous film, the particulate matter concentration is measured using a beta-ray absorbing method while removing the error influences of naturally occurring beta radiation, and includes an additional impact type sampler or cyclone type sampler for filtering the sample gas prior to collecting the particulate matter in the collecting region.

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“PTFE Membrane Filters” data sheet from Millipore Corporation, Bedford, MA, at www.millipore.com, printed May 2001.
Horiba Technical Reports: Readont No. 23, “Ambient SPM Monitor APDA—361”, Sep. 2001, pp. 43-46; with English Abstract.

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