Aerosol sampler
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United States of America Patent
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-
Jul 26, 1994
Grant Date -
N/A
app pub date -
Aug 2, 1993
filing date -
Sep 1, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An aerosol sampler comprises at least one U-tube whose ends are fixed to a support, and through which the aerosol is caused to flow. Means are provided to set the tube vibrating, and to measure its resonant frequency. The bend of the U-tube acts as an impactor so aerosol particles larger than a cut-off size are trapped, causing a change in the measured frequency. A sampler may include a number of such U-tubes in series, with steadily decreasing cut-off sizes, so the aerosol particulate size distribution can be determined.
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