A rotational rheometer, also known as a shear rheometer, is an instrument used to determine how a liquid or slurry flows. Rotational rheometers can measure viscosity, thixotropy, shear stress, and shear strain. Used is the plastics, petroleum, cosmetic, food, and pharmaceutical industries, rotational rheometers help to maintain parameters such as consistency and fluidity, which in turn allow predictions to be made about stability, texture, and shelf life. Rotational rheometers apply a known force to the sample and measure how it reacts to the force and the force the sample then exerts on the rheometer.
Features that can vary between rotational rheometers include viscosity ranges measured, whether or not there is a built in temperature probe, and the user friendliness of the controls and read out screen.
Discover and compare Rotational Rheometers:
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| Company | TA Instruments – a division of Waters Corporation | TA Instruments – a division of Waters Corporation |
| Item | Rubber Processing Analyzer RPA Flex and RPA Elite | Discovery™ Core Rheometer |
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| Catalog Number | RPA Flex / RPA Elite | Discovery Core |
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| Description | Virtually every aspect of a rubber material’s processing and performance characteristics is influenced by its rheological properties. TA Instruments provides a complete range of rotorless shear rheometers and curemeters to help you optimize processing, curing, and application performance. All TA Virtually every aspect of a rubber material’s processing and performance characteristics is influenced by its rheological properties. TA Instruments provides a complete range of rotorless shear rheometers and curemeters to help you optimize processing, curing, and application performance. All TA Instruments rubber rheometers are manufactured to exacting mechanical standards and with the latest measurement technology for the most accurate, reliable, and reproducible data available. Available automation systems allow for maximum unattended laboratory productivity in all test environments. Relevant ASTM, DIN, and ISO standards are easily met, as are demands for advanced testing, making these instruments the ideal choice for quality control, analytical, and research needs.... Read More | The Discovery™ Core Rheometer empowers every user to perform rheological measurements, guiding formulation development, optimizing performance and ensuring product quality. Whether you are new to rheology, upgrading your quality control testing, or expanding capabilities to meet growing demands, theThe Discovery™ Core Rheometer empowers every user to perform rheological measurements, guiding formulation development, optimizing performance and ensuring product quality. Whether you are new to rheology, upgrading your quality control testing, or expanding capabilities to meet growing demands, the Core Rheometer empowers your lab to discover insights into your materials’ behavior needed to advance your goals.
Discover Insights Beyond Viscosity
While viscometers report only a single viscosity value within a limited range, the Core Rheometer captures the complete viscosity profile, representing material behavior across all relevant conditions. Complex fluids like suspensions, emulsions, gels, pastes and slurries are non-Newtonian. Their viscosity changes with the applied shear rate and time; it is not a single value. Characterizing the full range of viscosity is critical to understand flow behavior under real-world conditions.
Rheometer Advantages: - Accuracy and precision
- Range of measurement
- Controlled shear rate
- Replicate process conditions
- Small sample volume
- Rapid temperature control
Test Modes: - Flow
- Oscillation
- Transient
Designed to Streamline Every Step:
Automatic gap control provides faster workflow and precise gap positioning. The axial motor automatically raises and lowers the head throughout the method and controls the test gap position with 0.1 um resolution for accurate and reproducible results.
Touchscreen capabilities go beyond basic controls, providing a new user experience ideal for high-throughput labs. Perform routine measurements directly at the instrument without need for PC interaction.
Integrated lighting enhances visibility for easier, more reproducible sample preparation leading to increased data accuracy and precision. The sample is automatically spotlighted during user interaction, guiding the operator and signaling test status.
Smart Swap™ 2 reader automatically identifies attached geometry, recalls dimensions and stored calibrations, and validates geometry aligns with the selected RheoGuide™ method. Smart Swap eliminates common sources of error and enables more efficient operation.
Compact design incorporates electronics, Peltier and air-cooling heat exchanger in one unit. Compared to modular systems with liquid circulators, the Core Rheometer requires up to 75% less bench space.... Read More |
| Torque Range | 0.0001 to 25 N.m | Minimum: 0.5 µN.m Maximum: 125 mN.m |
| Frequency | 0.1 to 2.0 Hz (6 to 120 cpm) | Inquire |
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