Rotational Viscometer

The Qualitest range of rotational viscometers is engineered for the precise characterization of both Newtonian and non-Newtonian fluids. These instruments operate on a foundational principle: measuring the torque required to rotate a spindle at a constant speed while it is immersed in the fluid. The measured torque is directly proportional to the viscous drag, providing highly accurate and repeatable viscosity data.

This method provides significant analytical advantages. The continuous rotation of the spindle in a rotary viscometer allows for detailed measurement over time, which is essential for analyzing time dependent fluids. Because the shear rate is constant at any given speed, these instruments are highly effective for a wide range of materials. Furthermore, by operating the spindle at several different speeds, a comprehensive profile of shear dependent behavior can be analyzed. Qualitest delivers this advanced capability at a cost effective rotational viscometer price point, providing a strategic tool for any serious quality control or research laboratory.