The viscosity of liquids can be determined with a rotation viscometer, in which a motor with variable rotation speed drives a cylinder immersed in the liquid to be investigated with a spiral spring. The viscosity of the liquid generates a moment of rotation at the cylinder which can be measured with the aid of the torsion of the spiral spring and read on a scale.
Benefits
Classic experiment to determine the viscosity of a huge variety of fluids
Watch all results directly on the built-in multilanguage display
Use several spindles that come with a storage rack
Wearless torque measuring system with high accuracy
Digital speed control
Interdisciplinary use also in applied sciences or physical chemistry
Tasks
Determine the gradient of the rotational velocity as a function of the torsional shearing stress for two Newtonian liquids (glycerine, liquid paraffin).
Investigate the temperature dependence of the viscosity of Castor oil and glycerine.
Determine the flow curve for a non Newtonian liquid (chocolate).