Viscosity comparison tubes
Article No. 0510
Bubble Viscometer A-T
Viscosity Range 0.5 - 5.5 St
- Kinematic viscosity in Stokes: 0.5 - 5.5
- Set of 20 bubble tube standards A - T with 2 empty tubes (Grade A)
Features
BYK-Gardner bubble viscometers are used to quickly determine kinematic viscosity of known liquids such as resins and varnishes. The bubble viscometer tubes are also described as Gardner-Holdt tubes.The bubble viscometer sets are bubble tubes arranged in the most common viscosity ranges.
- Economically priced
- The liquid standards are sealed in glass tubes
- Long lasting shelf life up to 15 years
- Sample tubes can be cleaned quickly and easily
- Tubes have no orifices that can be clogged to cause faulty measurements
- Repeated readings may be taken easily once the temperature has been controlled
- Ideal to measure the kinematic viscosity of resins and varnishes
- The bubble tubes can be recertified to NIST traceable standards
Technical Attributes
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- Viscosity
- 0.5 - 5.5 St
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- Certificate
- not included
Technical Specifications
Standards
Procedure
Bubble Viscometer Procedure
- Knowing the approximate viscosity, pick four standard tubes closest in viscosity to your sample
- Fill the sample tube with liquid, insert a cork, and then using the tube holder 0577, insert the four lettered tubes and the sample tube into the holder
- Turn over the holder and visually compare what letter best matches the rise time of the bubble in the sample
- The rise time in seconds of the sealed tubes and samples can also be determined using a basic timer
Please be aware of the following accuracies when performing the test:
- Temperature control: 1 °C = 10 % error
- Verticality control: 5° slant = 10 % error
- Tube I.D. control: 0.1 mm = 2 % error
ASTM D 1545 Timer Method
The tube has three amber ring marks at 27, 100 and 108 mm from the bottom. Fill the tube up to the 100 mm line, insert the cork down to the 108 mm line and turn the tube bottom up. Turn the tube around, start the stop watch when the air bubble crosses the 27 mm line and stop when the bubble crosses the 100 mm line.
Delivery Content
Set of 20 bubble tube standards A-T (0511-0530)
2 empty tubes grade A (0571)
Manual
Storage case
2 empty tubes grade A (0571)
Manual
Storage case
Knowledge
Guide to Viscosity Measurement
Viscosity is an important property of liquids to determine how they flow, spread, or level under certain conditions. It can be defined as a liquid’s internal resistance to flow. Being able to measure the viscosity will allow to predict the behavior in a process or an application. When applying a paint by roll application the paint viscosity will strongly influence the amount of paint applied per surface area, thereby determining both yield and hiding power. It is crucial for liquid products to undergo a viscosity measurement in incoming and outgoing QC.
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