Viscometers Information Viscometers are used to define the viscous properties of a fluid at ambient or defined temperatures. They commonly come in the form of a calibrated capillary tube through which a liquid is allowed to pass at a controlled temperature in a specified time period. Other methods include rotational viscometry and falling ball tests.   Viscometers can have a few different technologies by which they operate. For rotational viscometry, torque is required to rotate a...
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Q & A on Viscometers

We asked our users for their input on Viscometers. Here are the results of 119 users familiar with Viscometers.

Who Took Our Poll? | Design Trends | Applications and Use | Features | Buying Advice

Design TrendsTop

Q:
What new technologies are influencing viscometer design?
18 answers
Answers:

Techniques based on oscillation, rotation and translation.

~Gheorghe D, Research & Development, Sydney, Australia

Easy to calibrate, easy to use by non-qualified technicians, temp. stability and regulation approved, easy to clean capillaries, easy maintenance and of course competitive prices.

~Chalghoumi R, General Management, Tunis, Tunisia
Maybe electromagnets. I have recently read a review about pulse viscometer design for blood viscosity measurements. I'm not focused on that field, just sharing. On the other hand, I think nanotechnology (nano-torque, for instance) must be influencing viscometer design.
~Maria Pia M, Student, Rosario, Argentina
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Q:
From your perspective, which companies are creating the most innovative viscometers?
18 answers
Answers:

Haake Viscometers (Thermo Haake GmbH - Germany 2. Brookfield Viscometers (Brookfied Inc - USA They are best designers in the world)

~Manawaduge S, Chief Technical Officer, Kalutara North, Sri Lanka

Malvern Instruments, Brookfield Engineering Laboratories Inc., Dynisco, Anton Paar-Physica Rheometers, Rheologica Instruments AB, Stable Micro Systems Ltd, Thermo Fisher Scientific.

~Onyekachi O, Student, Guimaraes, Portugal
Kittiwake Monitoring & Control Laboratoriies (MCL) Spectro Inc
~Leon M, Technical Support, Secunda, South Africa
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Applications and UseTop

Q:
What are some of the applications you have used a viscometer for?
37 answers
Answers:
Determination of viscosity of food products (mayonnaise, ketchup etc.) to keep within customer spec. Considering use for viscosity of clay in the form of 'slip'.
~Bernard M, Engineer, Stoke-on-Trent, England

Ink rheology, biomaterial rheology, protein drug formulation, nanoparticle rheology, polymer rheology, low viscosity material viscosity measurement...

~Engineering, Design, San Ramon, CA
Routine measurements for a wide category of liquids and new techniques for defining standard liquids for viscosity.
~Gheorghe D, Research & Development, Sydney, Australia
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Q:
Please share with us any “non-standard” applications that a viscometer has been used for.
6 answers
Answers:

Drug stability study, nanoparticle drug delivery, high shear ink analysis (>1M 1/s shear rate).

~Engineering, Design, San Ramon, CA

In some machines, Non-Newtonian liquids which it is not capable for.

~Subimal B, General Manager (technical), Gurgaon, India
Polymer characterization
~Onyekachi O, Student, Guimaraes, Portugal

Q:
Do you know of any disastrous mistakes that occurred due to the incorrect usage of a viscometer?
6 answers
Answers:

Wrong 'tip' used, so 1000kg of product sent to rework when it should have gone to customer.

~Bernard M, Engineer, Stoke-on-Trent, England

-Flame is applied and an observation made as to whether or not a flash has occurred; -a value below the so-called maximum could be disastrous; -is the build-up of acid due to some kind of decomposition or chemical reaction

~Elisoara-Narcissa T, Engineer, Pitesti, Romania

Mishandling the spindles, as well as overvoltage, may definitely damage the equipment.

~Maria Pia M, Student, Rosario, Argentina

FeaturesTop

Q:
What would your design or feature "wish list" be for this product?
19 answers
Answers:

If a manufacturer can design a Viscometer to cover high/medium/low ranges without changing rotors and sensors.

~Manawaduge S, Chief Technical Officer, Kalutara North, Sri Lanka

It should be a laboratory type and easy to operate, and hold its accuracy even when operating at more than 200 degrees centigrade.

~Purushottam K, Manufacturer, Rudrapur, MS

Small sample volume, easiness for loading and cleaning, rapid measurement time, accuracy at low viscosity range.

~Engineering, Design, San Ramon, CA
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Q:
Is there any advice you want to share with users to help them avoid common errors in selection or usage of a viscometer?
7 answers
Answers:

Yes, be careful when choosing between meeting standards like ASTM and equivalent to the ASTM Standards or IP standards!!!

~Chalghoumi R, General Management, Tunis, Tunisia

Understand the temperature pressure of your product stream. Understand that viscosity changes with temperature.

~Patrick D, Design Engineer, Houston, TX

Yes, refer to the correct standard test method ISO, ASTM any other standards according to their country.

~Manawaduge S, Chief Technical Officer, Kalutara North, Sri Lanka
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Buying AdviceTop

Q:
Do you have any advice for people relative to buying or using a viscometer?
8 answers
Answers:

Consider:  User friendliness, Repeatable, accurate results, Back-up service, Availability of spares and spare unit, Time to repair, Local support, Robust, Calibration, Cost of consumables.

~Leon M, Technical Support, Secunda, South Africa

I think nowadays networking may be an important tool for getting advice before buying a viscometer. I also strongly recommend some practical courses on viscosity measurement for correct usage of a viscometer. http://www.brookfieldengineering.com/services/educational-programs/practical-course.asp

~Maria Pia M, Student, Rosario, Argentina

Know your stream data in advance of selecting a viscometer. Share this info with your vendor. Have utilities available to condition the product sample.

~Patrick D, Design Engineer, Houston, TX

YES: 1. Learn metrology first. 2. Select from the market the most accurate viscometer in measurement & calibration of basic quantities contributing to viscosity (Temperature, dimensions of all pieces in contact with the liquid specimen, force, mass); 3. Users must make their own standard liquids.

~Gheorghe D, Research & Development, Sydney, Australia
Seek advice from previous users.
~Bernard M, Engineer, Stoke-on-Trent, England
Yes Haake or Brookfied Viscometers.
~Manawaduge S, Chief Technical Officer, Kalutara North, Sri Lanka
Please choose viscometer carefully so that right application.
~Nguyen T, Marketing/Sales, Hanoi, Vietnam
Look at emerging technology.
~General Management


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