The tunnel impactor: Calibration with copper sulphate aerosol under atmospheric conditions
article
The tunnel impactor, developed by the Agricultural University Wageningen (Regtuit et al., 1988), is a new sampling device for the determination of the mass-size distribution of coarse atmospheric aerosols. It comprises four impactors consisting of a number of circular ribbons of 2, 5, 15 and 50 am width, each with a different cut-off diameter. Four fans at the tunnel outlet keep the linear air
speed at 5 m.s -1, slightly depending on the wind speed. Iso-axial sampling is obtained by a wind vane mounted on the instrument to keep the tunnel inlet facing the wind. The calibration of the instrument was carried out with copper sulphate aerosol in the aerodynamic diameter range of ll to 77 ~m, under atmospheric conditions (de auiter, 1988).
speed at 5 m.s -1, slightly depending on the wind speed. Iso-axial sampling is obtained by a wind vane mounted on the instrument to keep the tunnel inlet facing the wind. The calibration of the instrument was carried out with copper sulphate aerosol in the aerodynamic diameter range of ll to 77 ~m, under atmospheric conditions (de auiter, 1988).
Topics
TNO Identifier
114189
ISSN
0021-8502
Source title
Journal of Aerosol Science
Pages
987-990
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