Absolute viscosities and interfacial properties – precisely measured according to international standards

The change in viscosity due to temperature fluctuations is of importance in those places where oils and liquids are produced, pumped, and moved. The minimization of friction losses due to the selection of suitable oils is essential when it comes to the design of machines and pneumatics. As mentioned before, capillary viscometry is the most precise and strictly standardized method to measure absolute viscosities. Measuring routines need to be executed efficiently, quickly, with absolute safety, and reproducibly at any time. With the modular concept of LAUDA Scientific, system configurations can be put together which combine the functionalities required for the respective purpose.

Important indicators of oil quality, for example, to check the deterioration of transformer oils, are also the surface tension (ST) to air, but particularly the interfacial tension (IT) to water or aqueous solutions. The surface/interfacial tension also serves to characterize additives for fuels and lubricants or to analyze tertiary crude oil production and all sorts of surfactants, e.g. emulsifiers, wetting agents, etc. Alongside the conventional lamellae tension methods of Du Noüy and Wilhelmy, LAUDA Scientific provides the drop volume and bubble pressure methods with which adsorption processes of amphiphilic additives or aging products can also dissolve over time on interfaces.

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