The difficulty in viscosity measurement of hot melt adhesives and liquids at high temperatures is that accurate temperature control must be maintained at all times, i.e., ensuring the temperature of each sample in order to obtain valid data. Brookfield Thermosel solves this problem by providing a stable and controlled sample environment. This is necessary for high temperature measurement systems, which, coupled with the high accuracy inherent in Brookfield viscometers, results in accurate and reproducible measurements.