Abstract
Measurement of liquid concentration is important application using a shear horizontal surface acoustic wave (SH-SAW) sensor. In this paper, methanol concentration of a direct methanol fuel cell is monitored using the SH-SAW sensor. To determine the liquid concentration, the perturbation theory for an electrical perturbation is used. Estimated results indicate that the SH-SAW sensor can apply to the continuous estimation of liquid concentration without a reference liquid.
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