NEW DENSITY-IN DEPENDENT MOISTURE MEASUREMENT h1 THOIDS USING FRIEQUENCY- SWEPT MICROWAVE TRANSMISSION

This paper presents density independent; moisture measurement procedures using freyuencyswept microwaves. By proper processing changes of attenuation and phase of a transmilted signal versus frequency, calibrahion curves can be easily generated on-site, without any need of varying density or layer thickness of moist material under test. It is shown, that the new measurement methods are usable up to very high moisture contents of more them 40%, in contrast to previous methods, which are only usable below approximately 25%.