ConTec produces and sells coaxial cylinder viscometers in variable sizes or capacity testing on material sample from 300 ml to 25 liters. The viscometers are fully automated and computerized viscometers for fresh concrete, mortar and paste.
The first viscometer, ConTec-Viscometer, was developed at the Norwegian Institute of Technology by Dr. Olafur Wallevik et. al. as a part of an extensive research program on fresh concrete properties during years 1982-1991.
Under the supervision of Dr. Wallevik there have been developed more types of viscometers. The viscometers have been sold to several countries around the world.
Con Tec offers 4 (5) types of Viscometers
To estimate the accuracy, the ConTec viscometers (with wide range of radius of inner and outer cylinders as well as the height of the inner cylinder) have been tested with commercial oil, CylEsso 100. More information (pdf-file)