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Label-free surface acoustic wave-based embedded flow sensor



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


This paper presents a calibration/label-free flow sensor embedded in a microfluidic system. This sensor is based on surface acoustic waves, where the acoustic intensity is dependent on the flow rate of the propagating medium. The range of flow rates studied was between 10 μL/min to 1 mL/min, with a sensitivity of 7 μV/(μL/min). Different to readily available sensors that need tracers (e.g., particles, fluorophores) or the use of temperature distribution to measure flow, this sensor requires no external optical components, and can be used with any type of liquid at a broad range of temperature/liquid conditions.
Proceedings Title
Proceedings of Micro Total Analysis Systems 2019
Conference Dates
October 27-31, 2019
Conference Location
Basel, -1
Conference Title
The 23rd International Conference on Miniaturized Systems for Chemistry and Life Sciences (µTAS 2019)


Flow Metrology, Electroacoustics, SAW Sensor
Created October 27, 2019, Updated February 4, 2020