During membrane formation the dope viscosity is a very important parameter. Therefore when spinning hollow fibers the dope viscosity is one of the important quality parameters. The Thermo Scientific HAAKE Viscotester® 550 measures the viscosity of a solution as function of shear stress (τ) shear rate (ϒ) and temperature. The measurement principle is based on the torque required to turn an object in a fluid.


Speed: 0.1 till 800 min-1

Resolution: 0.5% fsd

Viscosity: 2 till 200000 mPas

Temperature: -30 till 100 °C