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Real-Time Capacitive Detection of Microdroplets

[+] Author Affiliations
Caglar Elbuken, Tomasz Glawdel, Danny Chan, Carolyn L. Ren

University of Waterloo, Waterloo, ON, Canada

Paper No. IMECE2010-37760, pp. 717-718; 2 pages
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 10: Micro and Nano Systems
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4447-2
  • Copyright © 2010 by ASME


This paper presents a cost-effective and scalable method for real-time detection of microdroplets in microchannels. Sensing electrodes are manufactured using standard microfabrication techniques. Commercial capacitive sensors are used for detection. The functional and simple hardware ensures portability and yields a signal-to-noise ratio of 4 for electrodes covered with a passivation layer. Experimental results for detection of aqueous droplets in silicone oil are presented.

Copyright © 2010 by ASME



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