Product category:
Powder, droplet and particle characterisation
News Release from: Malvern Instruments | Subject: SV-10 Vibro viscometer
Edited by the Processingtalk Editorial
Team on 25 February 2005
New viscometer accessory for Malvern
Zetasizer
Malvern has added the SV-10 Vibro viscometer to its range of material characterisation instruments for use with its Zetasizer Nano particle characterisation systems
Malvern has added the SV-10 Vibro viscometer to its range of material characterisation instruments for use with its Zetasizer Nano particle characterisation systems The SV-10 is exceptionally easy to use and clean, is relatively low cost and gives rapid, highly accurate viscosity measurements in the range 0.3 to 10,000 mPas
This article was originally published on Processingtalk on 15 Aug 2008 at 8.00am (UK)
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With 1% accuracy across the whole measurement range, the data it generates can be used to enhance the accuracy of particle size measurements by dynamic light scattering.
Used together, the SV-10 and the Zetasizer Nano provide an excellent option for the study of emulsions and dispersions, and more particularly for the characterisation of proteins in solution prior to crystallisation.
The technique of dynamic light scattering determines particle size by observing the random movement of particles undergoing Brownian motion.
As this behaviour is directly related to the viscosity of the fluid in which the particles are moving, inaccuracies in the measurement of viscosity translate directly into inaccuracies in particle size measurement.
The very high accuracy of the SV-10, even at the low viscosities typical of aqueous media, therefore makes it an invaluable accessory for dynamic light scattering systems.
The SV-10 determines viscosity by measuring the current required by an electromagnetic drive to vibrate two gold paddles immersed in the sample at constant amplitude.
The damping effect on the vibration due to the sample is related to its viscosity.
The system takes around 15 seconds to stabilize, after which a continuous reading of viscosity is produced.
The use of gold plated sensors makes the unit compatible with all fluids and it is suitable for measurements in the temperature range 0 to 100C. Request a free brochure from Malvern Instruments ...
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