Application of Microwave Moisture Sensor for DOC and Animal Feed

Abstract

Measurement of moisture is of paramount importance for optimising energy consumption as well as increasing product quality and shelf life in process industries. Details of a comprehensive design for building a microwave-based moisture sensor along with calibration methodology and field demonstration of this concept is presented. Calibration, which is an essential step before field deployment, has been demonstrated using a waveguide method. The methodology presented connects the calibration performed using the waveguide method to that of free space methods employed in the field. Results for two field tests in De-oiled cake (Soya) and Animal feed (cattle feed) processing plants are analysed. The deficiencies and capabilities of the method to perform density-independent measurements have been demonstrated in these real-world scenarios.