LAUSR

HIGHLIGHTSMeter for analysis of gasoline based on piezoelectric resonator with lateral electric field is developed.Maximal resistance of the electrical impedance of resonator is suitable parameter of sensor.Possibility of considering temperature of gasoline at its analyses is shown.Example of finding octane number of unknown sample of gasoline is shown. ABSTRACT It has been shown that by using piezoelectric lateral electric field excited resonators based on X – cut LiNbO3, one can determine the octane number of gasoline. The measured dependence of gasoline permittivity on its octane number has shown that there is an ambiguous connection between pointed parameters. We have demonstrated both theoretically and experimentally that the value of the real part of the electrical impedance on the frequency of parallel resonance uniquely associates with the octane number of gasoline contacting the free side of the resonator. At that the frequency of parallel resonance does not depend on permittivity/octane number of gasoline. An example of determination of the octane number of a mixture of two different samples of gasoline is given.