Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Frequency tunable label-free surface acoustic wave-based flow sensor



Aurore F. Quelennec, Jason J. Gorman, Darwin Reyes-Hernandez


We present a label-free SAW-based flow sensor with enhanced precision and repeatability. This sensor improves the signal-to-noise ratio by one order of magnitude (dB scale) at an optimized frequency, and lowers the measurable flow rate to 5 μL/min (from 250 μL/min) when compared to our single frequency approach in time-domain. The device was designed so that the distance between the transducers is tunable to further increase its sensitivity to 40 mdB/(μL/min). This sensor provides an easy-to-integrating sensing element that does not affect the principal functionality of the microfluidic network and offers local flow information.
Proceedings Title
Proceedings of Micro Total Analysis Systems 2020
Conference Dates
October 4-9, 2020
Conference Location
Virtual Online, MD, US
Conference Title
The 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences (µTAS 2020)


Flow Metrology, Electroacoustics, SAW Sensor


Quelennec, A. , Gorman, J. and Reyes-Hernandez, D. (2020), Frequency tunable label-free surface acoustic wave-based flow sensor, Proceedings of Micro Total Analysis Systems 2020, Virtual Online, MD, US, [online], (Accessed June 19, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created October 7, 2020, Updated August 29, 2022