Item: Recent developments of snow moisture dielectric devices
Title: Recent developments of snow moisture dielectric devices
Proceedings: 1986 International Snow Science Workshop, Lake Tahoe, California, USA
Authors: A. Denoth and A. Foglar
Abstract: Dielectric measuring methods of the liquid water content make use of the substantial difference between the permittivities of dry snow and water. Different types of snow moisture meters, designed to fit for practical measuring situations, have been developed and tested: A plate condenser, a cylindrical condenser and a monopole antenna are used as sensors to measure the mean water content in a comparable large snow volume; differently shaped flat condensers are used as sensors for measuring the wetness in thin layers. Snow wetness is derived from the corresponding permittivities and snow density. By the measurement of both the permittivity and the loss factor, the des~ructive measurement of snow density may be avoided. For this purpose, a special sensor (U-guide) with an operating frequency in the microwave regime will be tested in the next future.
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Keywords: dry snow, dielectric, liquid water, snow volume
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