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Related Experiment Video

Updated: Jun 24, 2026

Thermal Measurement Techniques in Analytical Microfluidic Devices

Thermal Measurement Techniques in Analytical Microfluidic Devices

Published on: June 3, 2015

Microwave temperature measurement in microfluidic devices.

David Wong¹, Gurkan Yesiloz, Muhammed S Boybay

¹Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada. c3ren@uwaterloo.ca.

|May 21, 2016

Summary

This summary is machine-generated.

This study introduces a novel microwave thermometry method for accurately measuring individual droplet temperatures in microfluidic segmented flow. The non-intrusive technique offers a reliable solution for fast-moving droplets.

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Area of Science:

Microfluidics
Thermometry
Microwave Sensing

Background:

Existing thermometry methods for microfluidics face challenges with fast-moving droplets in segmented flow.
Fluorescence-based and resistance temperature detectors require sufficient exposure time, which is difficult to achieve with dynamic microfluidic systems.

Purpose of the Study:

To develop a non-intrusive microwave thermometry method for measuring individual droplet temperatures in microfluidic segmented flow.
To overcome the limitations of existing techniques regarding droplet speed and exposure time.

Main Methods:

Utilized a microwave sensor operating in the GHz frequency range.
Correlated fluid temperature with the sensor's resonance frequency for remote, direct sensing.
The method requires minimal external equipment and no fluorescent dyes.

Main Results:

Demonstrated reliable operation of the microwave sensor over multiple tests.
The sensor is capable of both heating and sensing, with a temperature accuracy of ±1.2 °C.
Successfully detected the temperature of individual, fast-moving droplets.

Conclusions:

The developed microwave thermometry method provides an effective solution for real-time temperature measurement of individual droplets in microfluidic segmented flow.
This non-intrusive technique offers high accuracy and reliability, overcoming previous limitations in microfluidic temperature sensing.