Aerosol sampler with cascade impaction and uniform deposition

Details Aerosol sampler with cascade impaction and uniform deposition Aerosol sampler with cascade impaction and uniform deposition

1984-12-21

1987-02-03

Levy, Stewart J.

Measuring and testing

Sampler, sample handling, etc.

With constituent separation

G01N 124

Patent

active

046401407

ABSTRACT:
An apparatus of the aerosol sampler type with cascade impaction and uniform deposition comprising a conical air inlet fixed to a tight, hollow, cylindrical chamber of revolution constituted by the superimposing of several stages in the form of hollow cylinders of revolution traversed by the air flow from the conical inlet and each having a circular plate perforated with holes located on concentric circles coaxial to the plate and having an identical diameter progressively decreasing in each stage, as well as a collection disk located downstream of the perforated plate and whose diameter is smaller than the internal diameter of the impacter chamber, incorporating a pump for ensuring the vertical downward circulation of the air and driving gears for the relative rotation of each perforated plate with respect to the corresponding collection disk, wherein in each stage the axis of rotation of the disk passes through the disk and is offset relative to the axis of the circular perforated plate.

REFERENCES:
patent: 2682771 (1954-07-01), Parker
patent: 2894877 (1959-07-01), Sinden
patent: 3518815 (1970-07-01), McFarland et al.
patent: 3693457 (1972-09-01), Pilat
patent: 4321822 (1982-03-01), Marple et al.
"A New Personal Dust Sampler, the CIP"; Atmospheric Pollution 1978; Proceedings of the 13th International Colloquium; Paris, France; Studies in Environmental Science; vol. I; pp. 83-86; Apr.-1978; P. Courbon.
"A Collection Device for Capturing a Spray Sample"; J. Phys. E: Sci. Instrum.; vol 11, No. 6, pp. 525-528; Jun.-1978; William S. Janna et al.

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