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Compact liquid analyzer based on a resonator with a lateral excitation electric field
B D Zaitsev1, I A Borodina1, A A Teplykh1
1Kotelnikov Institute of Radio Engineering and Electronics of Russian Academy of Sciences, Saratov Branch, Saratov 410019, Russia.
Abstract:
A compact hardware-software complex for measuring the electrical and mechanical parameters of a liquid based on a piezoelectric resonator with a lateral exciting electric field has been developed. It is shown that the modulus of the electrical impedance of the resonator near the resonant frequency decreases monotonically with an increase in conductivity of the contacting liquid. The obtained dependences can be used as calibration curves for measuring conductivity in the range of 100-10,000 μS/cm. A method for the simultaneous determination of the modulus of elasticity, viscosity, and permittivity of a liquid using the electromechanical equivalent scheme was developed and tested on a mixture "water - glycerol" with the different glycerol content.
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