Title :
Inductively coupled sensing using a quartz crystal microbalance
Author :
Wu, Wei ; Greve, David W. ; Oppenheim, Irving J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA
Abstract :
We report the application of a quartz crystal microbalance (QCM) in an inductively coupled measurement. Inductive coupling makes it possible to locate the sensing element in a hostile environment and to perform measurements without direct wired connections. We demonstrate inductively coupled sensing of methanol in nitrogen using a poly(ethyl methacrylate) adsorbing layer. The gas-related signal is easily detectable and is substantially larger than changes associated with thermal expansion of the apparatus.
Keywords :
acoustic resonance; crystal resonators; gas sensors; inductive sensors; microbalances; organic compounds; quartz; direct wired connections; inductively coupled sensing; methanol; poly(ethyl methacrylate) adsorbing layer; quartz crystal microbalance; thermal expansion; Admittance; Coils; Coupling circuits; Frequency measurement; Methanol; Nitrogen; Polymer films; Resonant frequency; Ultrasonic variables measurement; Weight control; Inductively coupled; admittance; methanol vapor; polymer; quartz crystal microbalance;
Conference_Titel :
Ultrasonics Symposium, 2008. IUS 2008. IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2428-3
Electronic_ISBN :
978-1-4244-2480-1
DOI :
10.1109/ULTSYM.2008.0246
