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Dynamic viscometers
+ infoCertified viscosity standard oils for calibration and verification
Certified viscosity standard oils are reference fluids used to verify, calibrate and validate the performance of viscosity measurement instruments. They provide laboratories with traceable reference values, ensuring accurate, repeatable and reliable viscosity measurements.
Fungilab supplies certified viscosity standard oils covering a wide range of viscosity values for the calibration and routine verification of both rotational and capillary viscometers in accordance with internationally recognised laboratory practices.
Using certified reference oils helps laboratories maintain measurement confidence, improve quality control and demonstrate traceability throughout the testing process.
Our products
Viscolead Series
Viscolead ONE
Viscolead ADV
Accessories
LABORATORY DIVISION
Dynamic viscosity
Viscosity is part of the science of Rheology which quantifies the resistance materials give to changing shape.
Proper interpretation of viscosity data can reduce the rate of rejects while keeping production and formulation development costs to a minimum. Consistent product quality is ensured through proper viscosity measurements, either alone or in conjunction with compatible tests.
Dynamic viscosity testing can help with:
- Material characterization or “finger-printing”
- Standard testing methods to check for differences between batches
- Indirect way of measuring quality
- Product formulation
- Quality control
- Process control
- Design, optimization and operation of process equipment
Material characterization or “finger-printing”
Standard testing methods to check for differences between batches
Indirect way of measuring quality
Product formulation
Quality control
Process control
Design, optimization and operation of process equipment
Viscosity types
Dynamic viscosity
Centipoise (mPa*s)
Kinematic viscosity
Centistokes (mm2/sec)
Apparent viscosity
Centipoise (mPa*s)
Newton’s Law
According to Newton’s law, the viscosity of a fluid is constant. As shear rate changes, shear stress changes in proportion such that viscosity is constant. Common fluids that exhibit such behavior are:
Unfortunately for us, not all fluids follow Newton’s law. In fact, most fluids do not. For this reason, fluids are classified into two categories:
Rotational Viscometer
The viscosity is calculated from the measured torque and rotational speed, as well as the dimensions of the measuring geometry.
A fluid’s resistance to flow is measured by the torque it exerts on the rotating shaft of the viscometer.
Absolute viscosity: the measuring geometry fulfills certain requirements (which is the case of coaxial spindles).
Relative viscosity: the dimensions of the measuring geometry are not well defined.
Advantage
Flexibility in:
- Viscosity Range
- Temperature range
- Shear rate range
Application
For Newtonian and non-Newtonian substances and temperatures different from room temperature.
Rotational dynamic viscometers for laboratory and industrial applications
Dynamic viscometers measure the resistance of a material to flow by rotating a spindle inside the sample and measuring the resulting torque. This rotational measurement principle is widely used for determining the viscosity of Newtonian and non-Newtonian fluids in laboratories and production environments.
Accurate viscosity measurements are essential for product quality, process consistency and research activities across industries such as food, pharmaceuticals, cosmetics, chemicals, paints, coatings, adhesives and petrochemicals.
Fungilab dynamic viscometer range
Fungilab offers several families of dynamic viscometers to meet different laboratory requirements.
- Viscolead Series for intuitive routine viscosity measurements.
- V-Series for advanced laboratory applications with wireless connectivity.
Accessories for specialized measurements
Different sample types require different measuring configurations. Fungilab provides dedicated accessories to extend the capabilities of its dynamic viscometers.
- Small Sample Adapter (APM) for measurements using very small sample volumes.
- Low Viscosity Adapter (LCP) for low-viscosity liquids.
- HELDAL Unit for highly viscous products such as creams, gels and pastes.
- Thermosphere for viscosity measurements at temperatures up to 300°C.
Temperature control and calibration
Reliable viscosity measurements require stable temperature conditions. Fungilab offers heating circulators and refrigerated circulators to maintain precise temperature control during testing.
Instrument performance can be routinely verified using certified viscosity standard oils, ensuring accurate, repeatable and traceable laboratory measurements.
Applications
Dynamic viscometers are widely used for quality control, formulation development, incoming raw material inspection, production monitoring and research. They help laboratories maintain consistent product quality while supporting compliance with internal quality procedures and international standards.
Selecting the appropriate dynamic viscometer
The ideal dynamic viscometer depends on the viscosity range, sample characteristics, temperature requirements, available sample volume and required measurement precision. Fungilab offers complete viscosity measurement solutions adapted to both routine laboratory work and advanced research applications.
Frequently asked questions about the Viscolead ADV
What is a dynamic viscometer?
A dynamic viscometer measures the resistance of a liquid or semi-solid material to flow by determining the torque generated while rotating a spindle inside the sample.
Which industries use dynamic viscometers?
Dynamic viscometers are widely used in the food, pharmaceutical, cosmetic, chemical, paint, coating, adhesive and petrochemical industries.
Which dynamic viscometers does Fungilab manufacture?
Fungilab manufactures the Viscolead Series and V-Series rotational dynamic viscometers, together with a complete range of accessories for specialized viscosity measurements.
Can dynamic viscometers measure non-Newtonian fluids?
Yes. Rotational dynamic viscometers are suitable for measuring both Newtonian and non-Newtonian materials when the appropriate spindle and testing conditions are selected.
Why is temperature control important?
Viscosity varies with temperature, so maintaining stable thermal conditions is essential for obtaining accurate and repeatable measurement results.
Can small sample volumes be measured?
Yes. The Fungilab Small Sample Adapter (APM) allows accurate viscosity measurements using small sample volumes while maintaining excellent repeatability.
How can the accuracy of a dynamic viscometer be verified?
Routine verification using certified viscosity standard oils helps ensure measurement accuracy, repeatability and long-term instrument performance.
How do I choose the right dynamic viscometer?
The most suitable instrument depends on the viscosity range, sample type, operating temperature and laboratory requirements. Fungilab offers solutions for both routine quality control and advanced research applications.
