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Highly Sensitive Measurement of Liquid Density in Air Using Suspended Microcapillary Resonators.
- Source :
-
Sensors (14248220) . 2015, Vol. 15 Issue 4, p7650-7657. 8p. - Publication Year :
- 2015
-
Abstract
- We report the use of commercially available glass microcapillaries as micromechanical resonators for real-time monitoring of the mass density of a liquid that flows through the capillary. The vibration of a suspended region of the microcapillary is optically detected by measuring the forward scattering of a laser beam. The resonance frequency of the liquid filled microcapillary is measured for liquid binary mixtures of ethanol in water, glycerol in water and Triton in ethanol. The method achieves a detection limit in an air environment of 50 µg/mL that is only five times higher than that obtained with state-of-the-art suspended microchannel resonators encapsulated in vacuum. The method opens the door to novel advances for miniaturized total analysis systems based on microcapillaries with the add-on of mechanical transduction for sensing the rheological properties of the analyzed fluids without the need for vacuum encapsulation of the resonators. [ABSTRACT FROM AUTHOR]
- Subjects :
- *RESONATORS
*MASS density gradients
*CAPILLARY flow
*LASER beams
*ETHANOL
Subjects
Details
- Language :
- English
- ISSN :
- 14248220
- Volume :
- 15
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Sensors (14248220)
- Publication Type :
- Academic Journal
- Accession number :
- 102279684
- Full Text :
- https://doi.org/10.3390/s150407650