Rolling Ball Viscometer Method

Rolling ball viscometer measures the rolling time of a ball through transparent and opaque liquids based on Hoeppler's falling ball principle. A ball of known dimensions rolls through a closed capillary, which contains the sample liquid. A preset angle determines the inclination of the capillary. The time it takes the ball to descend a defined distance within the fluid is directly related to the fluid’s viscosity. It is mainly used for viscosity measurements of low viscous liquids for R&D applications, in the pharmaceutical and chemical industries.