Viscosity determination on liquids - using calibrated capillary tube with mechanism to generate various rates of shear in the liquid

摘要

Flow characteristics of liquids esp. biological liquids are measured by determining the pressure drop across a capillary tube section. A fixed volume of liq. is drawn through in a constant time and the pressure drop is accurately monitored. An auxiliary liquid can be used if necessary. The sample liq. is drawn through by a piston type pump through the test section to control its temp. under rest conditions. It is then pump. This is followed by a high shear action to determine the viscosity in the non-Newtonian region. For use on biological liquids esp. blood. Because the system is programmed, the measurement is easy and different liquids can be checked without problem.