Full range of Cannon glass capillary viscometers – sizes, ranges, and expanded uncertainty

Glass Capillary Viscometers
Why does CANNON offer so many different types of glass capillary viscometers? Primarily because no single capillary viscometer is ideally suited for all kinematic viscosity determinations. Individual analysts also have their own preferences. The brief descriptions on the following page may assist you in determining which viscometer is most appropriate for your particular application. Feel free to contact CANNON with your questions.

Expanded Uncertainty
Instead of listing the precision of our glass capillary viscometers, we now provide the expanded uncertainty. This is the universally accepted statistic when dealing with calibration data. In order to maintain A2LA accreditation, we are required to determine and specify the expanded uncertainty for all our calibration data.
ISO publications define expanded uncertainty as “quantity defining the interval about the result of a measurement within which the values that could reasonably be attributed to the measurement may be expected to lie with a high level of confidence.”
Our use of expanded uncertainty instead of precision does not reflect any change in the accuracy or quality of our viscometers. It is a statistical term that is more comprehensive than precision. When comparing the accuracy of viscometers it is essential that the expanded uncertainty be specified.

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