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Cannon-Fenske Opaque
Cannon-Fenske Opaque capillary viscometers
Cannon-Fenske Opaque capillary viscometers are designed for accurate kinematic viscosity measurements of dark or opaque Newtonian liquids. Their reverse-flow design allows reliable measurements when the liquid level cannot be observed using conventional routine capillary viscometers.
Fungilab Cannon-Fenske Opaque viscometers comply with internationally recognised ASTM, ISO and UNE standards, making them suitable for laboratory testing, quality control and industrial applications requiring traceable and repeatable viscosity measurements.
Each viscometer is individually calibrated to ensure reliable long-term performance and consistent measurement accuracy.
Our products
Kinematic Viscometer Types
CANNON-FENSKE
CANNON-FENSKE OPAQUE
ASTM D-445-446, ASTM D2515, ISO 3104-3105 and UNE 400313
Cannon-Fenske Opaque Viscometers (reverse flow type) are used for dark Newtonian liquids; especially suitable for liquids so dark in colour that cannot be seen in a Cannon-Fenske routine viscometer. Also used to study shearing stress and shearing rate. Sample volume: aprox. 12 ml. Precision: ±0.3%. Value indicated at 40ºC and 100ºC in both bulbs.
CANNON-FENSKE ROUTINE
ASTM D-445-446, ASTM D2515, ISO 3104-3105 and UNE 400313
Cannon-Fenske Routine Viscometers quickly and easily measure the viscosities of transparent Newtonian liquids. Sample volume: approx. 7 ml. Precision: ±0.2%. With constant value indication at +40 ºC and +100ºC.
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.
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.
Reverse-flow capillary viscometers for opaque Newtonian liquids
The Cannon-Fenske Opaque viscometer is specifically developed for measuring the kinematic viscosity of dark or opaque Newtonian liquids. Unlike routine capillary viscometers intended for transparent samples, its reverse-flow design allows accurate measurements when the liquid level cannot be clearly observed.
This makes the Cannon-Fenske Opaque particularly suitable for petroleum products, lubricants, oils and other highly coloured liquids requiring precise laboratory viscosity measurements.
International testing standards
Fungilab Cannon-Fenske Opaque viscometers are manufactured in accordance with internationally recognised standards, including:
- ASTM D445
- ASTM D446
- ASTM D2515
- ISO 3104
- ISO 3105
- UNE 400313
Main features
- Reverse-flow design for opaque Newtonian liquids.
- Suitable for highly coloured samples.
- High measurement accuracy and repeatability.
- Individual calibration certificate supplied.
- Designed for laboratory quality control and research.
Calibration and traceability
Every Cannon-Fenske Opaque viscometer is supplied with an individual calibration certificate issued under the accreditation requirements of a National Metrological Register, providing measurement traceability and confidence in laboratory results.
To obtain accurate kinematic viscosity measurements, temperature stability is essential. Fungilab recommends using the THERMOCAP precision bath to maintain controlled measuring conditions throughout the test.
Other capillary viscometer solutions
For transparent Newtonian liquids, Fungilab also offers the Cannon-Fenske Routine range. Additional capillary measurement solutions include the BS/U-Tube for transparent liquids, BS/IP/RF U-Tube for opaque liquids and Ubbelohde viscometers.
Typical applications
Cannon-Fenske Opaque viscometers are widely used for testing petroleum products, lubricants, oils and other opaque Newtonian liquids in quality control laboratories, research centres and industrial testing facilities.
Fungilab can recommend the appropriate viscometer constant according to the expected viscosity range, testing temperature and applicable international standard.
Frequently asked questions about Cannon-Fenske Opaque
What is a Cannon-Fenske Opaque viscometer?
It is a reverse-flow glass capillary viscometer designed for measuring the kinematic viscosity of dark or opaque Newtonian liquids that cannot be tested reliably using conventional routine viscometers.
Why use a Cannon-Fenske Opaque viscometer instead of a routine model?
The reverse-flow design makes it possible to measure opaque or highly coloured liquids where the liquid level cannot be clearly observed during a conventional capillary test.
Which standards does the Cannon-Fenske Opaque comply with?
It complies with ASTM D445, ASTM D446, ASTM D2515, ISO 3104, ISO 3105 and UNE 400313.
Does each viscometer include a calibration certificate?
Yes. Every Cannon-Fenske Opaque viscometer is individually calibrated and supplied with its own calibration certificate to ensure measurement traceability.
Which samples are suitable for Cannon-Fenske Opaque viscometers?
They are intended for dark or opaque Newtonian liquids such as petroleum products, lubricants, oils and other highly coloured fluids.
Why is temperature control important during capillary viscosity testing?
Kinematic viscosity is temperature-dependent, so stable thermal conditions are required to obtain accurate and repeatable measurement results.
What is the difference between Cannon-Fenske Opaque and Cannon-Fenske Routine?
Cannon-Fenske Opaque is designed for opaque or dark Newtonian liquids using a reverse-flow design, while Cannon-Fenske Routine is intended for transparent Newtonian liquids.
Which other capillary viscometers does Fungilab offer?
Fungilab also manufactures Cannon-Fenske Routine, BS/U-Tube, BS/IP/RF U-Tube and Ubbelohde capillary viscometers to cover a broad range of kinematic viscosity measurement applications.
