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Ubbelohde DIN 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.
DIN-compliant Ubbelohde viscometers for laboratory viscosity testing
Ubbelohde DIN viscometers are widely used for determining the kinematic viscosity of transparent Newtonian liquids in laboratories requiring high measurement precision and excellent repeatability. Their suspended-level capillary design provides consistent measurement conditions while reducing errors associated with variations in filling volume.
These instruments are commonly employed in petroleum laboratories, chemical industries, universities and research facilities where compliance with DIN methods is required.
Suspended-level capillary principle
The characteristic suspended-level design of the Ubbelohde viscometer ensures that the hydrostatic pressure remains independent of the quantity of liquid introduced into the capillary. This design improves measurement reproducibility and makes the instrument particularly suitable for high-precision laboratory work.
Typical applications
- Mineral oils.
- Lubricating oils.
- Petroleum products.
- Chemical solutions.
- Organic solvents.
- Polymer solutions.
- Research laboratories.
- Calibration and quality control laboratories.
Complete kinematic viscosity systems
For optimum performance, Ubbelohde DIN viscometers are typically used with the THERMOCAP, which provides highly stable temperature control during viscosity testing.
Fungilab also offers additional capillary viscometers, including Cannon-Fenske Routine viscometers for transparent liquids and other specialised kinematic viscosity applications.
Importance of temperature stability
Kinematic viscosity is directly influenced by temperature. Accurate DIN viscosity measurements therefore require precise thermostatic control throughout the test. Precision temperature baths ensure stable conditions and improve both repeatability and measurement accuracy.
Advantages of Ubbelohde DIN viscometers
- Excellent repeatability.
- High measurement accuracy.
- Suspended-level capillary design.
- Reduced sensitivity to filling volume variations.
- Suitable for transparent Newtonian liquids.
- Ideal for research, calibration and quality control laboratories.
Industries using Ubbelohde DIN viscometers
Ubbelohde DIN viscometers are widely used in lubricant manufacturers, petroleum laboratories, chemical industries, universities, research institutes and industrial laboratories where reliable kinematic viscosity measurements are essential.
Frequently asked questions about the Viscolead ADV
What is an Ubbelohde DIN viscometer?
An Ubbelohde DIN viscometer is a suspended-level glass capillary viscometer designed for precise kinematic viscosity measurements of transparent Newtonian liquids according to DIN methods.
Why is the suspended-level design important?
The suspended-level design minimises the influence of sample volume on the measurement, resulting in higher accuracy and better repeatability.
Which liquids can be measured?
Ubbelohde DIN viscometers are suitable for transparent Newtonian liquids such as lubricants, mineral oils, solvents and chemical solutions.
Why is temperature control necessary?
Kinematic viscosity is temperature dependent, so precise thermostatic control is essential for accurate and repeatable measurements.
Which temperature bath is recommended?
The THERMOCAP precision bath is recommended to provide the stable temperature conditions required for high-accuracy kinematic viscosity testing.
Are Ubbelohde DIN viscometers suitable for calibration laboratories?
Yes. Their precision and repeatability make them ideal for calibration laboratories, research facilities and quality control environments.
Which industries commonly use Ubbelohde DIN viscometers?
They are widely used in petroleum, lubricant, chemical, academic and industrial laboratories performing kinematic viscosity measurements.
What are the main advantages of Ubbelohde DIN viscometers?
They provide highly accurate, repeatable kinematic viscosity measurements while minimising the influence of sample filling volume through their suspended-level capillary design.
