NDJ-1F Rotational Viscometer ◆◆Purpose: The NDJ-1F rotational viscometer is designed and manufactured in accordance with the requirements specified in T0625 "Asphalt Brookfield Rotational Viscosity Test (Brookfield Viscometer Method)" of the JTJ052 "Standard Test Methods of Bitumen and Bituminous Mixtures for Highway Engineering" from the People's Republic of China. It is an upgraded version of the company's NDJ-1C and NDJ-1D series Brookfield rotational viscometers. This instrument is suitable for measuring the absolute viscosity of Newtonian liquids and the apparent viscosity of non-Newtonian liquids. It 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: 25 mPa·s to 10 million mPa·s (expandable to 20 million mPa·s with optional No. 30 measuring rotor); ◆ Rotor specifications: 4 rotors included (No. 21, 27, 28, 29; No. 30 measuring rotor is optional); ◆ Rotor speed: 0.1 to 200 r/min; ◆ Measurement error: ±2% (F.S); ◆ Heater temperature control range: room temperature to 200°C; ◆ Heater temperature control accuracy: ±0.1°C; ◆ Sample container volume: 20 ml; ◆ Power supply: 220 V ±10%, 50 Hz AC; ◆ Operating environment: Ambient temperature: 5°C to 35°C (Note: Ambient temperature should be approximately 5°C lower than the heater control temperature); ◆ Relative humidity: ≤80%.