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Sep 30, 2026
Calibration Stability of Glass Capillary Viscometers
This article discusses glass capillary viscometers. These are used to measure the viscosity of Newtonian fluids. Important standards in this context include ASTM D445, the new DIN 53000, and ISO 3104.
Does a glass capillary viscometer really need to be recalibrated regularly? Or does the constant, once determined, remain stable for years? The answer might surprise you!
While modern measuring devices often provide viscosity readings more quickly, classic capillary viscometers have a decisive advantage: their precision is maintained over a long period of time. But why? And when is recalibration actually necessary?
In our article, you’ll learn:
Why borosilicate glass plays a key role
Which chemicals can affect your measurement accuracy—and which ones can’t
Which calibration standards apply and how long a calibration actually lasts
Practical examples: Does the viscometer constant really remain stable?
🔗 Read the full article here