Rheometer
Rheometer: Precision Measurement for Material Analysis
A rheometer is an essential instrument for measuring the rheological properties of materials. Whether you work in quality control, research and development, or production, our advanced rheometers provide accurate and reliable data for understanding material behavior under various conditions.
Key Features of Our Rheometers
- High-precision torque measurement with accuracy up to 0.1 µN·m
- Wide temperature range from -40°C to 300°C
- Multiple measuring systems including cone-plate, parallel plate, and Couette
- Advanced software for data acquisition and analysis
- Automated gap setting with micron-level precision
Technical Specifications
| Parameter | Specification |
|---|---|
| Torque Range | 0.1 µN·m to 200 mN·m |
| Angular Velocity | 0.0001 to 1000 rad/s |
| Frequency Range | 0.001 Hz to 100 Hz |
| Normal Force | 0.01 N to 50 N |
| Temperature Accuracy | ±0.1°C |
Rheometer Applications
Our rheometers are widely used in various industries including:
- Polymer characterization
- Food science and quality control
- Cosmetics and personal care products
- Pharmaceutical development
- Petroleum and lubrication analysis
Rheometer FAQ
What is the difference between a viscometer and a rheometer?
A viscometer measures viscosity under single flow conditions, while a rheometer can measure various rheological properties including viscosity, elasticity, yield stress, and viscoelastic behavior under different deformation modes (shear, extension, oscillation). Rheometers provide more comprehensive material characterization.
How often should a rheometer be calibrated?
We recommend calibration every 6 months for routine measurements or before critical experiments. For ISO-compliance, calibration should be performed annually by certified technicians using traceable standards. More frequent verification (weekly or monthly) using reference fluids is advised for intensive use.
What sample preparation is required for rheometer testing?
Sample preparation depends on material type. For liquids, degassing may be needed to remove air bubbles. Semi-solids should be loaded carefully to avoid introducing stress history. Solid samples may require special fixtures. Temperature equilibration is critical - typically 5-10 minutes at test temperature before measurement.
Advanced Measurement Capabilities
Our rheometers support sophisticated testing protocols:
- Stress and strain sweeps
- Frequency sweeps
- Temperature ramps
- Time-dependent measurements
- Thixotropy testing
Accessories and Options
| Accessory | Description |
|---|---|
| Peltier Temperature System | Precise temperature control from -40°C to 180°C |
| Evaporation Blocker | Prevents solvent loss during extended measurements |
| Normal Force Option | Measures normal force during shear deformation |
| Auto-Loader | Automates sample loading for high-throughput testing |
Why Choose Our Rheometers?
Our rheometers combine cutting-edge technology with user-friendly operation:
- Patented measurement technologies for superior accuracy
- Intuitive software with pre-programmed test methods
- Robust construction for laboratory and production environments
- Comprehensive technical support and training
- Global service network for maintenance and repairs
Rheometer Maintenance Tips
To ensure optimal performance of your rheometer:
- Clean measuring systems immediately after use
- Use recommended cleaning solvents for different materials
- Store instruments in dust-free environments
- Perform regular bearing checks
- Keep software updated
Rheometer FAQ (Continued)
Can a rheometer measure very low viscosity liquids?
Yes, our rheometers with ultra-low torque capability can accurately measure viscosities down to 0.1 mPa·s using special double-gap or cone-plate geometries. The air-bearing supported models eliminate mechanical friction for precise low-viscosity measurements.
What is the typical measurement time for rheological tests?
Simple viscosity measurements take 1-2 minutes. Comprehensive material characterization (flow curve, viscoelastic properties) may require 10-30 minutes per sample. Advanced protocols like temperature ramps or time-dependent studies can take several hours. Our software allows automated testing sequences for efficient data collection.
How do I select the right measuring system for my application?
The choice depends on sample type: cone-plate for homogeneous materials, parallel plates for heterogeneous samples or high temperatures, and Couette for low-viscosity fluids. Our application specialists can recommend the optimal geometry based on your material properties and testing requirements.