Piezoelectric resonant sensor using the acoustoelectric effect
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United States of America Patent
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Oct 3, 1995
Grant Date -
N/A
app pub date -
Nov 1, 1993
filing date -
Nov 1, 1993
priority date (Note) -
Expired
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Abstract
An AT cut quartz crystal resonator has an unbalanced electrode geometry to induce a particularly strong electrical field in a surface of the resonator adjacent a medium. The electrical field will interact with ions and dipoles in the medium and may be used to accurately and repeatably measure the electrical characteristics of the medium. Specific examples are provided illustrating the use of a sensor designed in accord with the invention in sensing dilute electrolytes, and other applications are contemplated.
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