17 January 2003 Ultrasonic temperature control and measurement in microfluidic channels
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Proceedings Volume 4982, Microfluidics, BioMEMS, and Medical Microsystems; (2003) https://doi.org/10.1117/12.478162
Event: Micromachining and Microfabrication, 2003, San Jose, CA, United States
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.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hemanth Jagannathan, Hemanth Jagannathan, Goeksenin G. Yaralioglu, Goeksenin G. Yaralioglu, A. Sanli Ergun, A. Sanli Ergun, Butrus T. Khuri-Yakub, Butrus T. Khuri-Yakub, } "Ultrasonic temperature control and measurement in microfluidic channels", Proc. SPIE 4982, Microfluidics, BioMEMS, and Medical Microsystems, (17 January 2003); doi: 10.1117/12.478162; https://doi.org/10.1117/12.478162


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