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Updated: Jul 7, 2026

Manufacturing Simple and Inexpensive Soil Surface Temperature and Gravimetric Water Content Sensors
Published on: December 21, 2019
Gravimetric method for in vitro calibration of skin hydration measurements
Ørjan G Martinsen1, Sverre Grimnes, Jon K Nilsen
1Department of Physics, University of Oslo, Blindern, Oslo NO-0316, Norway. ogm@fys.uio.no
Abstract:
A novel method for in vitro calibration of skin hydration measurements is presented. The method combines gravimetric and electrical measurements and reveals an exponential dependency of measured electrical susceptance to absolute water content in the epidermal stratum corneum. The results also show that absorption of water into the stratum corneum exhibits three different phases with significant differences in absorption time constant. These phases probably correspond to bound, loosely bound, and bulk water.
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