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Electromagnetic humidity sensor for industrial applications

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4 Author(s)
P. V. Vainikainen ; Helsinki University of Technology, Radio Laboratory, Espoo, Finland ; R. P. Agarwal ; E. G. Nyfors ; A. P. Toropainen

The letter describes an electromagnetic humidity sensor based on a resonance perturbation technique. The proposed sensor is capable of measuring humidity over a wide dynamic range in an industrial environment and is insensitive to dust, dirt, oil vapours etc. The all-metal construction of the sensor makes it immune to damage by high temperature. The sensor signal processing circuit provides a time-dependent signal which can be directly applied to any modern computerised control systems.

Published in:

Electronics Letters  (Volume:22 ,  Issue: 19 )