Article for the 23 rd Sensing Forum

particle size distribution (evaluation of Brownian motion) 
- 
Inferring the molecular weight of a turbid solution by measuring the viscosity 
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Measuring the cure processes and temperature characteristics of functional liquids 
such as coating materials and inks 
- 
Quantifying the “swallowability” of soft drinks or physical properties of biological 
objects such as blood viscosity 
Sampel temp. 25 ?C
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Concentration [%]
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SV10 value
Theoretical value
(Water) 
(Ethanol) 
Concentration and viscosity of ethanol solution 
Figure 6. 
* Theoretical value is corrected for 
density 
Figure 5. 
Coagulation and temperature dependency 
of chicken egg albumen

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Summary 
This article provides a brief explanation of the features of a new viscosity measurement 
method, the tuning-fork vibration viscometer, accompanied by actual measurement 
examples. The vibration viscometer measures “viscosity × density,” and using water as 
an example (the temperature coefficient of the density value is as low as 1/100 of the 
viscosity value) expresses the “viscosity × density” as the “static viscosity.” As a result, it 
has become possible to easily perform continuous measurements of various 
viscosity-related physical property changes. Various measuring methods for viscosity 
and uncertainties of these methods have already been verified and made publicly 
available as the JCSS standardized methods for viscosity measurement. Based on these 
experiences, it is expected that there will be more opportunities for precise viscosity 
measurements in such areas as research & development, production, and quality 
control in a variety of industries, thereby further contributing to their development.