Thermosel®/Controllers Viscosity Determination At Elevated Temperatures How It Solves A Difficult Problem The difficulty with viscosity measurements of hot melts and liquids at elevated temperatures has been in maintaining accurate temperature control that is consistent from sample to sample, so that meaningful data could be obtained. The Brookfield Thermosel® solves this problem by providing a stable, precisely controlled sample environment. This, together with the inherent accuracy of the Brookfield Viscometer, is fundamental to the Thermosel® System, which produces viscosity measurements that are not only accurate, but entirely reproducible. Several factors contribute to the stable environment:       - non-fluctuating temperature control       - small sample volume and insulated sample chamber, which reduces temperature gradients with the sample       - the rotating spindle, which acts as a built-in stirring device Expedited research and QC procedures Safe viscosity measurements of materials up to 300oC Precise temperature control within ±0.5% of set point temperature Excellent viscosity reproducibility Small sample volume (8 to 13 ml) Defined shear rates generated by coaxial cylinder geometry Manual or programmable temperature control Digital display of set point and Thermosel® temperature to 0.1oC or oF on controller Temperature display switchable to oC or oF Disposable sample chambers DIN spindle geometry available Various spindles are available for use with the Thermosel® System. Selection is determined by the viscosity measurement range that is required. Included with the Thermosel® are a thermo-container, safety guard and insulating cap, a proportional controller with RTD probe, one spindle (others available), one standard sample chamber, five disposable chambers, sample chamber holder, extraction tools, and an alignment bracket. The Model 106 Programmable Temperature Controller allows up to 10 pre-programmed test steps which include both a set temperature and hold time at that temperature. This permits measurement of viscosity-temperature data for any test sample. The Model 75 Temperature Controller (single set point) is also available. SPINDLE VISCOSITY RANGE - Centipoise (mPa·s) SHEAR RATE (sec-1) SAMPLE VOLUME (mL) LV SERIES VISCOMETERS SC4-18 SC4-31 SC4-34 LVT LVT & LVDV-I+ LVDV-II+* LVDV-III 1.32N** 0.34N 0.28N 9.5 10.0 9.5 5-10,000 50-100,000 100-200,000 3-10,000 30-100,000 60-200,000 1.5-30,000 15-300,000 30-600,000 1.2-30,000 12-300,000 24-600,000 RV SERIES VISCOMETERS SC4-21 SC4-27 SC4-28 SC4-29 RVT RVDV-E & RVDV-I+ RVDV-II+* RVDV-III 0.93N** 0.34N 0.28N 0.25N 8.0 10.5 11.5 13.0 50-100,000 250-500,000 500-1,000,000 1,000-2,000,000 50-170,000 250-830,000 500-1,700,000 1,000-3,300,000 25-500,000 125-2,500,000 250-1,700,000 500-6,700,000 20-500,000 100-2,500,000 200-5,000,000 400-10,000,000 HA SERIES VISOMETERS SC4-21 SC4-27 SC4-28 SC4-29 HAT HADV-E & HADV-I+ HADV-II+* HADV-III 0.93N** 0.34N 0.28N 0.25N 8.0 10.5 11.5 13.0 100-200,000 500-1,000,000 1,000-2,000,000 2,000-4,000,000 100-300,000 500-1,700,000 1,000-3,300,000 2,000-6,700,000 50-1,000,000 250-5,000,000 500-10,000,000 1,000-20,000,000 40-1,000,000 200-5,000,000 400-10,000,000 800-20,000,000 HB SERIES VISCOMETERS SC4-21 SC4-27 SC4-28 SC4-29 HBT HBDV-E & HBDV-I+ HBDV-II+* HBDV-III 0.93N** 0.34N 0.28N 0.25N 8.0 10.5 11.5 13.0 400-800,000 2,000-4,000,000 4,000-8,000,000 8,000-16,000,000 400-1,300,000 2,000-6,700,000 4,000-13,300,000 8,000-80,000,000 200-4,000,000 1,000-20,000,000 2,000-40,000,000 4,000-80,000,000 160-4,000,000 800-20,000,000 1,600-40,000,000 3,2000-80,000,000