Вопрос и ответ 446

How does heterogeneity of the material affect the sensor reading if I make a measurement of moisture? How does material size modulus affect the sensor reading?

Reply: 

Due to the selected range volume of the material can be approximately represented as the sphere with a radius of about 25-30 cm. Therefore the heterogeneity within this volume is averaged. For accurate measurements size of material fractions should be approximately 10-20 times smaller than the wavelength. We use wavelength of about 1 m and if necessary it can be increased up to 7.5 m.

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