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Rotational Viscometers

Rotational viscometers measure the resistance to rotation by submerging a calibrated spindle into a sample being tested and then rotating that spindle to a specified speed. The resistance that occurs during rotation is then measured and converted, by a factor, in viscosity units, centipoise (cP) or millipascal-seconds (mPa·s). In order to produce consistent results, the sample must be kept at the desired temperature during each test.

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