Abstract
A low-cost microwave moisture meter operating at a single frequency for instantaneous and nondestructive determination of moisture content of granular and particulate materials was developed, calibrated and tested with different kinds of grain and seed. The meter operates at a single microwave frequency of 5.8 GHz and uses the principle of free-space transmission measurement for the determination of attenuation, phase shift, and dielectric properties of a layer of material. Moisture content is determined independent of bulk density from the dielectric properties with a permittivity-based algorithm.
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