Phase method for monitoring the permittivity of different media

A nondestructive method was developed for rapidly monitoring the permittivities of solid, liquid, and gaseous materials, based on measuring the phase difference of signals passing along two transmission lines and comparing the parameters of the “standard” and “investigated” media. The design of a volume-integral microwave transducer is considered together with its operating principle and its range of application. Translated from Izmeritel'naya Tekhnika, No. 4, pp. 53–55, April, 1996.