Description
Asphalt Institute Vacuum Viscometer – Reversed Flow
🧪 Asphalt Institute Viscometer
The Asphalt Institute Vacuum Viscometer is a standard and high-precision glass instrument designed for measuring the viscosity of highly viscous materials such as bitumen and asphalt. It is manufactured in compliance with ASTM D2171 and utilizes a reversed-flow vacuum system to deliver highly accurate and reliable laboratory results.
🔍 Operating Principle and Unique Technology
The Asphalt Institute Vacuum Viscometer – Reversed Flow, manufactured by CANNON INSTRUMENT (USA), is a specialized glass viscometer used for measuring the viscosity of very high-viscosity materials, including bitumen, asphalt, resins, and polymer-based substances.
This viscometer operates using a reversed-flow vacuum method, where the sample is drawn in a controlled manner through a glass capillary under negative pressure. The flow time between calibrated marks is recorded and used to calculate viscosity.
This method enables accurate measurement even for opaque and extremely thick samples, which cannot be reliably tested using gravity-flow viscometers.
The instrument is widely used in quality control laboratories, research and development centers, petroleum industries, road construction, and materials engineering applications.
🧪 Features and Benefits – Asphalt Institute Viscometer
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Compliant with ASTM D2171 international standard
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Reversed flow design with controlled vacuum suction
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Suitable for very viscous and heavy materials
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Minimum sample volume: approximately 3 mL
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Required bath depth: minimum 180 mm
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Manufactured from durable laboratory-grade borosilicate glass
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Supplied with manufacturer calibration certificate
⭐ Advantages
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High accuracy and excellent repeatability
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Reduced sample consumption
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Ideal for quality control and research testing
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Suitable for both laboratory and industrial environments
📏 Measurement Ranges and Available Sizes
The Asphalt Institute Vacuum Viscometer is available in a wide range of sizes, from 25 to 800, each designed for a specific viscosity range.
This variety allows users to select the most suitable viscometer based on the type and viscosity level of the test material.

🏭 Applications
The Asphalt Institute Vacuum Viscometer is used for viscosity measurement and analysis of the following materials in laboratory and industrial environments:
✔ Asphalt and bituminous materials for road construction quality control
✔ Industrial lubricants and heavy oils
✔ Highly viscous and polymer-based fluids
✔ Chemical and resin materials
✔ Formulation analysis and new product development
Typical Users and Industries
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Asphalt and bitumen quality control laboratories
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Research and development of modified bitumen formulations
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Materials engineering and contracting companies
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Industrial research institutes and universities
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Industrial viscosity measurement and formulation design
🧾 Summary
The Asphalt Institute Vacuum Viscometer (Reversed Flow) is an essential instrument for the accurate measurement of viscosity in highly viscous materials. Designed in accordance with ASTM D2171, it offers high accuracy, low sample volume requirements, and certified calibration, making it ideal for quality control, research, and industrial applications in the asphalt, bitumen, and polymer industries.

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