METHOD AND SYSTEM FOR THE MEASUREMENT OF SUGAR IN A SOLUTION

The amount of sugar in a sample comprising a solution of the sugar is measured using a resonant oscillating electromagnetic field having a first frequency of 100MHz or more in a cavity resonator containing the sample and a further oscillating electromagnetic field a second frequency of 100MHz or less in the sample generated by driving oscillations in a tank circuit comprising reactive elements that include a reactive probe arranged to generate the further oscillating electromagnetic field in the sample. The first and second frequencies are different frequencies at which the electromagnetic properties of the solution differ. There is detected a characteristic of the resonant oscillating electromagnetic field is detected and an electrical parameter of the oscillations of the tank circuit which is a characteristic of the second oscillating electromagnetic field. A measure of the amount of sugar is derived from said detected characteristics.