Design and Operation of a Two-Stage Fogwater Collector

  • Dieter Schell
  • Hans-Walter Georgii


A sampling device has been developed, which allows to separate the fog droplet spectrum into two size fractions. The first stage collects droplets down to a diameter of 4 μm using a string collector technique. The second stage with a calculated 50 % cut-off diameter of 2 μm was constructed under application of numerically developed and experimentally proven design criteria. Depending on the actual liquid water content, the collector has been operated with a time resolution of 60–120 minutes during several fog events under different conditions. The samples have been analyzed for pH and total conductivity as well as for the major ions by Ion Chromatography. Concentration values in smaller droplets were found to be up to 14 times higher than the corresponding concentrations in larger droplets.


Small Droplet Large Droplet Liquid Water Content Cascade Impactor Impaction Surface 
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Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • Dieter Schell
    • 1
  • Hans-Walter Georgii
    • 1
  1. 1.Institute of Meteorology and GeophysicsUniversity of FrankfurtFrankfurt / MainFederal Republic of Germany

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