Rotational Viscometer Measures Viscosity, Analyzes Time-Dependent Fluids

Paul N. Gardner Co. introduces its rotational viscometers that measure viscosity by sensing the torque required to rotate a spindle at constant speed while immersed in fluid.

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Paul N. Gardner Co. introduces its rotational viscometers that 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. According to the company, rotational viscometers can determine absolute viscosity of all types of liquids with viscosities as high as 320 million centipoise.

The continuous rotation of the spindle allows measurements to be made overtime, supporting analysis of time-dependent fluids. In addition, the rotational viscometer enables users to calibrate the product and analyze dependent behavior by rotating the spindle at various speeds. The rate of shear is constant, so both Newtonian and non-Newtonian fluids can be tested.

All spindles are made of 316 stainless steel, are CE/UL/CSA approved and use universal power supply of 110-230 V, 50/50 Hz. Digital models are available for low to high viscosity materials.