A rapid method of determining the moisture content of milk powder by microwave sensor
is investigated. Calibration models of milk powder moisture content are established using
the linear least squares method. The results predicted by the microwave technique are
compared with that determined by standard weighing method. It shows that the maximal
measurement deviation was 0.2%, based on the microwave method, which provides an
effective tool for determining the moisture content of milk powder in the dairy processing
industry.