NDJ-1D Brookfield Rotational Viscometer ◆◆Purpose: The NDJ-1D Brookfield Rotational Viscometer is designed and manufactured in accordance with the requirements specified in T0625 "Asphalt Brookfield Rotational Viscosity Test (Brookfield Viscometer Method)" of the Chinese transportation industry standard JTJ052 "Test Procedures for Highway and Asphalt Mixtures." It is an upgraded version of the company's NDJ-1B and NDJ-1C Brookfield Rotational Viscometers and is suitable for measuring the absolute viscosity of Newtonian liquids and the apparent viscosity of non-Newtonian liquids. This instrument features high measurement sensitivity, reliable test results, user-friendly operation, and an aesthetically pleasing design. It is widely applicable for measuring the viscosity of various fluids such as asphalt, hot melt adhesives, paraffin, and polymers. ◆◆Technical Specifications: ◆ Measurement range: 100 mPa·s to 2 million mPa·s (expandable to 4 million mPa·s with optional rotor No. 30); ◆ Rotor specifications: Four rotors—No. 21, 27, 28, and 29 (rotor No. 30 is optional); ◆ Rotor speeds: Seven gears—0.5, 1, 2, 5, 10, 20, and 50 r/min; ◆ Measurement error: ±2% (F·S) (±3% (F·S) when using optional rotor No. 30); ◆ Temperature control range: 45°C to 200°C; ◆ Temperature control accuracy: ±0.1°C; ◆ Sample container volume: 20 ml; ◆ Power supply: AC 220V ±10%, 50 Hz; ◆ Ambient temperature: 5°C to 35°C (when the heater control temperature is close to room temperature, an air conditioner should be used to maintain the working environment temperature approximately 5°C below the heater control temperature); ◆ Ambient relative humidity: Not exceeding 80%.