Rosand Capillary Rheometer

Rosand capillary rheometers were the first to introduce the twin-bore measurement principle to the commercial market. Simultaneous measurements can be made on both long and short dies to determine the inlet pressure drop at the die and, therefore, absolute viscosity, using the Bagley method. The twin-bore technique offers obvious experimental advantages including improved throughput since both experiments are preheated simultaneously. Alternatively, the software can be configured to run a two material test, thereby measuring the viscosity of two different materials simultaneously.