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Microwave and Radio-Frequency Technologies in Agriculture by Peter Farrell, Mohan V. Jacob, Graham Brodie

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9 Moisture Monitoring

Microwave techniques have been considered for moisture sensing in many food processing and agriculture-related industries (Trabelsi, et al. 1998b). Chapter 7 highlighted the strong dependence of dielectric properties for organic materials on the moisture content of the material. Both bound water and free water have much higher dielectric properties than dry organic materials; therefore RF and microwave technologies have been used to automatically monitor moisture content.

9.1 Free-Space Moisture Detection

The previous chapter introduced the idea of using a free-space transmission technique for detecting decay in wood. The same technique can be used for measuring moisture in various materials. As the microwaves propagate ...

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