| Autor: |
J. Hribik, Felix Trampler, M. Hruskovic, Branka Devcic-Kuhar, R. Thalhammer, Martin Gröschl, H. Nowotny, Ewald Benes, Stefan Braun, M. Kostal |
| Rok vydání: |
2002 |
| Předmět: |
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| Zdroj: |
Proceedings of International Frequency Control Symposium. |
| DOI: |
10.1109/freq.1997.638528 |
| Popis: |
The paper describes a novel quartz crystal sensor for measurement of the density-viscosity product of Newtonian liquids. The sensor element consists of two piano-convex AT-cut quartz crystals vibrating in a thickness-shear mode with the liquid sample in between. This special set-up allows suppression of disturbing resonances in the liquid layer. Such resonances are generated in the common single-plate arrangements due to compressional waves caused by spurious out-of-plane displacements of the shear vibrating finite plate. The primary measurands of the sensor are the fundamental resonance frequency and the associated resonance Q-value, which are influenced by the viscously entrained liquid contacting the quartz surface. The sensor allows the measurement of samples with viscosities from almost zero (air!) up to 200 cP with a sample volume of 130 /spl mu/l. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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