Purpose
The instrument is designed and made as per T0625 in the Industry Standard JTJ052 Specification and Test Methods for Bitumen and Bituminous Mixtures for Highway Engineering, and ASTM D4402. It is suitable to determine apparent viscosity of highway asphalt at a temperature from 45 ℃ to 200 ℃ as per Brookfield Viscometer Rotation Methods. It can also be used to determine construction temperature for bituminous mixture as per viscosity-temperature curve. The instrument can also be used to determine viscosity of hot melt adhesive, oil grease, paraffin and high polymer. It can be widely used in cosmetics, food, pharmaceutical, dopes, chemical, and other industries.

Technical parameters
1. Measurement range: 25mPa•s～1×10000000mPa•s (If purchase the No.30 spindle, its measurement range can be extended to 2×10000000mPa•s);
2. Spindles: four spindles of No.21, 27, 28 and 29 (No.30 spindle is optional);
3. Spindle speed: 0.1～100 RPM continuously adjusted;
4. Measurement error: ± 2% (F•S) (± 3% (F•S) for No.30 spindle);
5. Temperature controlling range: 25℃～200℃;
6. Temperature controlling accuracy: ±0.1℃;
7. Cubage of sample chamber: 20 ml;
8. Power supply: AC 220V±10%, 50 Hz;
9. Ambient temperature: 5℃～35℃ (the ambient temperature should be about 5 ℃ lower than controlling temperature of heater);
10. Relative humidity: not more than 80%.