Liquid sensing system based on two port SH-SAW resonator

A new liquid flow sensing system constructed with SH-SAW resonator was used to characterize liquid properties. Surface acoustic waves with the shear horizontal displacement (SH-SAW) have been used for sensing the properties in liquid phase. The SH-SAW resonator having two port was fabricated on a 36° rotated Y cut X prop. LiTaO
₃
(36YX LiTaO
₃
) substrate. The flow of a sample liquid was precisely controlled by a liquid chromatography system. The transient responses were detected as sensor response by the two-port SAW resonator. The results showed a specific feature and are used to determine the liquid properties.