SV-10 Vibro Viscometer

The SV-10 viscometer is the latest addition to Malvern’s range of material characterization systems.
The Vibro viscometer is a fast, simple to use system using patented technology that ensures high result accuracy.

Measurement involves lowering the sensors into the sample, pressing the start button on the control unit, then waiting just 15 seconds for the result to be displayed. Cleaning is simply a matter of rinsing and wiping the gold plated sensor plates.

Viscosity range: 0.3 to 10,000mPa.s (Centipoise)
Accuracy and repeatability: 1% over the whole measurement range

The main application is in conjunction with the Zetasizer Nano is to improve the accuracy of size and zeta potential measurement.

When measuring size using dynamic light scattering, or zeta potential using microelectrophoresis, the accuracy of the result depends on the accuracy of the dispersant viscosity used.

Any additive in the dispersant will affect the viscosity. For example, a buffer such as ‘Tris’ (Tris Hydroxymethylaminoethane) at isotonic concentration will increase the viscosity by 5%, and an additive such as 3.5% Ethylene Glycol will increase the viscosity by 10%.

Since the size calculated by the technique is directly related to the accuracy of the viscosity the user inputs, the error in the size reported will be 5% and 10% in these cases, if the viscosity change due to these additives is not taken into account.

Download the Vibro Viscometer technical note