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Ubbelohde ASTM viscometers
Ubbelohde ASTM viscometers for high-precision kinematic viscosity measurements
Ubbelohde ASTM viscometers are precision glass capillary viscometers designed for determining the kinematic viscosity of transparent Newtonian liquids in accordance with internationally recognised ASTM test methods.
The suspended-level design minimises the influence of the sample volume on the measurement, providing highly accurate and repeatable viscosity determinations for research, quality control and calibration laboratories.
Fungilab supplies complete kinematic viscosity solutions including ASTM-compliant Ubbelohde viscometers, precision temperature baths and laboratory accessories.
Our products
Kinematic Viscometer Types
UBBELOHDE (ASTM & DIN)
UBBELOHDE (ASTM & DIN)
These FUNGILAB glass capillary viscometers allow measurement of viscosities using ASTM and DIN testing methods. All capillary viscometers are supplied with the calibration certificate issued in accordance with the conditions of accreditation granted by a National Metrological Register which has assessed the measurement capability of the laboratory, the test uncertainty and its traceability to recognized international standards UKAS.
UBBELOHDE ASTM (ASTM D445-446, ASTM D2515, ISO 3104-3105 and UNE 400313)
UBBELOHDE DIN (DIN 51562 Part 1, ISO 3105 and UNE 400313)
Ubbelohde Viscometers are used to determine kinematic viscosity of transparent
Newtonian liquids. Sample volume: approx. 15 ml.
Precision: ±0.2%.
* Fungilab offers many types of glass capillary viscometers that are not listed in our catalog. We can also manufacture glass capillary viscometers with customer-specified constants. Viscometers with special constants, added temps, and before/after data are available by special order.
For further information contact Fungilab.
Accessories
Today’s business world brings new challenges that demand innovative solutions. Fungilab’s aim, as a leading viscosity technology company, is to become an expertise partner in the viscosity world to offer you our best products and services.
To provide you and your customers with this necessary attention and an expertise support, Fungilab offers a wide range of products for the measuring of the kinematic viscosity of your products.
Our kinematic series include: the Höppler viscometer (falling ball), for the measurement of the low viscosity liquids in all industries; capillary viscometer series and baths, in accordance to ASTM and DIN methods, to obtain the most accurate viscosity of your liquids; and flow cup viscometers, suitable for paints, inks, varnishes and similar products.
Kinematic viscosity is a measure of a fluid’s resistance to flow under the influence of gravity. It’s defined as the ratio of the fluid’s dynamic (absolute) viscosity to its density. In other words, it describes how thick or thin a fluid is without the involvement of any external force except gravity.
ASTM-compliant Ubbelohde viscometers for laboratory viscosity testing
Ubbelohde ASTM viscometers are widely recognised as one of the most accurate instruments for measuring the kinematic viscosity of transparent Newtonian liquids. Their suspended-level capillary design provides excellent measurement repeatability while reducing errors caused by variations in sample filling volume.
These viscometers are routinely used in petroleum laboratories, chemical industries, research centres and calibration laboratories where compliance with ASTM procedures is required.
Suspended-level measurement principle
Unlike conventional capillary viscometers, the Ubbelohde design incorporates a suspended measuring column, allowing the hydrostatic pressure head to remain independent of the amount of liquid introduced into the instrument. This improves reproducibility and measurement accuracy.
Typical applications
- Lubricating oils.
- Mineral oils.
- Petroleum products.
- Chemical solutions.
- Organic solvents.
- Polymer solutions.
- Calibration laboratories.
- Research and development.
Complete kinematic viscosity systems
For optimum performance, Ubbelohde ASTM viscometers are commonly used together with the THERMOCAP, which provides highly stable temperature control for capillary viscosity measurements.
Fungilab also offers additional capillary viscometers, including Cannon-Fenske Routine models for transparent liquids.
Why temperature stability matters
Kinematic viscosity is strongly influenced by temperature. Maintaining constant thermal conditions throughout the measurement is essential for obtaining accurate, repeatable and ASTM-compliant results. Precision thermostatic baths minimise temperature fluctuations during testing.
Advantages of Ubbelohde ASTM viscometers
- Excellent measurement repeatability.
- Suspended-level capillary design.
- Reduced influence of filling volume.
- High measurement accuracy.
- Suitable for transparent Newtonian liquids.
- Ideal for research, calibration and quality control laboratories.
Industries using Ubbelohde ASTM viscometers
Ubbelohde ASTM viscometers are widely employed in petroleum testing laboratories, lubricant manufacturers, chemical industries, universities, research institutes and calibration facilities where precise kinematic viscosity measurements are required.
Frequently asked questions about Ubbelohde ASTM
What is an Ubbelohde ASTM viscometer?
An Ubbelohde ASTM viscometer is a suspended-level glass capillary viscometer used to measure the kinematic viscosity of transparent Newtonian liquids with high precision.
What is the advantage of the suspended-level design?
The suspended-level design minimises the effect of sample volume on the measurement, improving repeatability and overall accuracy.
Which samples can be measured?
Ubbelohde ASTM viscometers are suitable for transparent Newtonian liquids such as lubricants, mineral oils, solvents and chemical solutions.
Why is temperature control important?
Kinematic viscosity changes with temperature, so precise thermostatic control is essential for obtaining accurate and repeatable ASTM measurements.
Which temperature bath is recommended?
Fungilab recommends the THERMOCAP precision bath for accurate temperature regulation during kinematic viscosity testing.
Are Ubbelohde viscometers suitable for calibration laboratories?
Yes. Their excellent repeatability and precision make them ideal for calibration, research and quality control laboratories.
What industries commonly use Ubbelohde ASTM viscometers?
They are widely used in petroleum, lubricant, chemical, academic and industrial research laboratories.
What are the main benefits of Ubbelohde ASTM viscometers?
They provide highly accurate, repeatable and ASTM-compliant kinematic viscosity measurements with minimal influence from sample filling volume.
