Measurement of liquefied petroleum gas quantity in a tank by radio-frequency techniques

Measurement of liquefied petroleum gas quantitative parameters is considered. The radio-frequency (RF) measurement method is proposed, providing highly accurate determination of level (gas-liquid interface position), density, and mass of liquid and gaseous phases, as well as total mass. Three RF sensors (two-level sensors and a gas density sensor) are contained in the designed RF measuring devices. Informative parameters (resonant frequencies of electromagnetic oscillations) of these RF sensors are jointly processed, providing the needed data. Experimental procedures are described, and measurement results are presented. An industrial RF measuring system is described.