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Issue 5, 2012
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A flux monitoring method for easy and accurate flow rate measurement in pressure-driven flows

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Abstract

We propose a low-cost and versatile method to measure flow rate in microfluidic channels under pressure-driven flows, thereby providing a simple characterization of the hydrodynamic permeability of the system. The technique is inspired by the current monitoring method usually employed to characterize electro-osmotic flows, and makes use of the measurement of the time-dependent electric resistance inside the channel associated with a moving salt front. We have successfully tested the method in a micrometer-size channel, as well as in a complex microfluidic channel with a varying cross-section, demonstrating its ability in detecting internal shape variations.

Graphical abstract: A flux monitoring method for easy and accurate flow rate measurement in pressure-driven flows

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Supplementary files

Article information


Submitted
02 Jun 2011
Accepted
08 Nov 2011
First published
10 Jan 2012

Lab Chip, 2012,12, 872-875
Article type
Technical Innovation

A flux monitoring method for easy and accurate flow rate measurement in pressure-driven flows

A. Siria, A. Biance, C. Ybert and L. Bocquet, Lab Chip, 2012, 12, 872
DOI: 10.1039/C1LC20480G

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