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Proceedings Paper

Ultrasonic temperature control and measurement in microfluidic channels
Author(s): Hemanth Jagannathan; Goeksenin G. Yaralioglu; A. Sanli Ergun; Butrus T. Khuri-Yakub
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Paper Abstract

This paper describes the design and operation of a system used for the accurate control and measurement of temperature in micro-fluidic channels. Ultrasonic transducers are used for both heating and measuring the temperature of fluids inside the channel. Heating is performed by exciting the transducer with a tone burst at a single frequency. The temperature measurement is done through non-invasive means by monitoring the velocity of a sound propagating through the channel. The whole system is automated for data collection using Labview. The system developed has the advantages of easy integration, simple operation and design along with a wide application domain. The same ultrasonic transducer can be used for both heating and temperature measurement leading to possibilities of closed loop temperature control in micro-channels. The system requires milli-watts of power for heating and has a nano-second response time for temperature measurement with an accuracy of 0.1 degrees.

Paper Details

Date Published: 17 January 2003
PDF: 5 pages
Proc. SPIE 4982, Microfluidics, BioMEMS, and Medical Microsystems, (17 January 2003); doi: 10.1117/12.478162
Show Author Affiliations
Hemanth Jagannathan, Stanford Univ. (United States)
Goeksenin G. Yaralioglu, Stanford Univ. (United States)
A. Sanli Ergun, Stanford Univ. (United States)
Butrus T. Khuri-Yakub, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 4982:
Microfluidics, BioMEMS, and Medical Microsystems
Holger Becker; Peter Woias, Editor(s)

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