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Open AccessArticle

Fluid Sensing Using Quartz Tuning Forks—Measurement Technology and Applications

Institute for Microelectronics and Microsensors, Johannes Kepler University, 4040 Linz, Austria
Micro Resonant OG, 4020 Linz, Austria
Author to whom correspondence should be addressed.
Sensors 2019, 19(10), 2336;
Received: 23 April 2019 / Revised: 16 May 2019 / Accepted: 17 May 2019 / Published: 21 May 2019
(This article belongs to the Special Issue Quartz Tuning Fork-based Sensors)
We provide an overview of recent achievements using quartz tuning forks for sensing liquid viscosity and density. The benefits of using quartz crystal tuning forks (QTFs) over other sensors are discussed on the basis of physical arguments and issues arising in real world applications. The path to highly accurate and robust measurement systems is described and a recently devised system considering these findings is presented. The performance of the system is analyzed for applications such as the mixing ratio measurement of fuels, diesel-soot contamination for engine oil condition monitoring, and particle size characterization in suspensions. It is concluded that using properly designed systems enables a variety of applications in industry and research. View Full-Text
Keywords: viscosity; density; condition monitoring; measurement instrument viscosity; density; condition monitoring; measurement instrument
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Voglhuber-Brunnmaier, T.; Niedermayer, A.O.; Feichtinger, F.; Jakoby, B. Fluid Sensing Using Quartz Tuning Forks—Measurement Technology and Applications. Sensors 2019, 19, 2336.

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