Description

Rotational viscometers have become a standard in virtually all industries.
They measure viscosity by sensing the torque required
to rotate a spindle at constant speed while immersed in fluid. The
torque is proportional to the viscous drag on the spindle; thus the
sample viscosity.
Rotational viscometers offer several advantages:
■ The continuous rotation of the spindle allows measurements
to be made over time, permitting analysis of time-dependent
fluids
■ The rate of shear is constant, so both Newtonian and
non-Newtonian fluids can be tested
■ By rotating the spindle at several different speeds, shear
dependent behavior can be analyzed
Rotational viscometers are the industry standard in determining
absolute viscosity of all types of liquids with viscosities as high as
320 million centipoise. BYK-Gardner offers digital models for low
– medium – high viscosity materials.