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Brookfield rotational viscometers
+ infoDynamic viscosity measurement for laboratory and industrial applications
Dynamic viscosity measurement is essential for evaluating how liquids and semi-solid materials resist flow under applied force. Accurate viscosity data supports product development, quality control and process optimisation across a wide range of industries.
Fungilab provides complete dynamic viscosity measurement solutions based on precision rotational viscometers, temperature control systems and specialized accessories designed to deliver reliable, repeatable and traceable laboratory results.
Whether measuring low-viscosity liquids or highly viscous materials, Fungilab offers instruments adapted to routine laboratory testing as well as demanding research applications.
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.
Alternative rotational viscometers for laboratory viscosity measurement
Rotational viscometers determine viscosity by measuring the torque required to rotate a spindle inside a sample at a controlled speed. This measurement principle is widely used throughout laboratories and industrial quality control because it provides reliable results for both Newtonian and non-Newtonian materials.
When comparing rotational viscometers, laboratories should evaluate more than the instrument itself. Measuring range, spindle selection, sample volume, operating temperature, software capabilities and available accessories all influence measurement quality and long-term laboratory productivity.
Fungilab rotational viscometer portfolio
Fungilab offers a complete range of dynamic viscosity measurement instruments suitable for quality control, formulation, research and industrial process applications.
The Viscolead Series combines precision, intuitive touchscreen operation and excellent repeatability, making it an ideal solution for routine laboratory testing.
For laboratories requiring enhanced connectivity and advanced functionality, the V-Series incorporates wireless operation, patented technology and a dedicated mobile application designed to improve productivity.
Accessories for every application
Different samples require different measuring configurations. Fungilab provides dedicated accessories that extend the capabilities of rotational viscometers:
- Small Sample Adapter (APM) for measurements using sample volumes from approximately 8 to 13 ml.
- Low Viscosity Adapter (LCP) for low-viscosity liquids starting from approximately 1 cP.
- HELDAL Unit for highly viscous materials such as creams, gels and pastes.
- Thermosphere for viscosity measurements performed at temperatures up to 300°C.
Maintaining measurement accuracy
Viscosity measurements are highly dependent on temperature. For this reason, Fungilab also offers heating circulators, refrigerated heating circulators and certified viscosity standard oils to improve repeatability, verify calibration and ensure reliable laboratory performance.
Selecting the right rotational viscometer
The best rotational viscometer depends on the viscosity range, expected sample volume, measuring temperature and testing objectives. Routine quality control, product development and advanced laboratory research often require different configurations and accessories.
Fungilab can help laboratories identify the most appropriate rotational viscosity measurement solution according to their specific application and testing requirements.
Frequently asked questions about the Viscolead ADV
What is a rotational viscometer?
A rotational viscometer measures viscosity by determining the torque required to rotate a spindle inside a sample at a controlled speed.
Does Fungilab manufacture rotational viscometers?
Yes. Fungilab develops a complete range of rotational viscometers for laboratory, research and industrial quality control applications, covering a wide variety of viscosity ranges and testing requirements.
Which Fungilab rotational viscometer is suitable for routine laboratory work?
The Viscolead Series is designed for routine viscosity measurements, offering intuitive operation, high repeatability and reliable laboratory performance.
Which model is recommended for advanced laboratory applications?
The Fungilab V-Series provides advanced rotational viscosity measurement capabilities with wireless operation, patented technology and enhanced data management.
Can rotational viscometers measure both Newtonian and non-Newtonian fluids?
Yes. Rotational viscosity measurement is suitable for both Newtonian and non-Newtonian materials when the appropriate spindle and measuring conditions are selected.
Can low-viscosity liquids be measured accurately?
Yes. The Fungilab Low Viscosity Adapter (LCP) is specifically designed for accurate measurements of low-viscosity liquids from approximately 1 cP.
How can measurement accuracy be maintained?
Stable temperature conditions, correct spindle selection and periodic verification using certified viscosity standard oils all contribute to accurate and repeatable viscosity measurements.
Can Fungilab help select the appropriate rotational viscometer?
Yes. Fungilab can recommend the most suitable instrument and accessories based on the sample characteristics, viscosity range, operating temperature and laboratory application.
