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ISO Flow Viscosity Cups

Article No. 0213

ISO Flow Cup 3 mm
ISO Flow Viscosity Cup, 10-40 cSt with certificate

  • Range in Centistokes: 10 - 40
  • Efflux Time in Seconds: 30 - 100
  • Orifice Diameter in mm: 3
  • Certificate included

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Orifice Diameter
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$308.00 €233.00 excl. taxes & shipping cost


The BYK-Gardner ISO Cup is compliant with ISO 2431 and ASTM D5125 methods.

  • Body made of anodized aluminum
  • Stainless steel orifice, interior polished
  • Calibrated against standard oils referenced to certified PTB oils (Federal Institute of Physics and Metrology of Germany) to be within 3% (drain time of calibration oil)

Technical Attributes

    Technical Specifications

  • Standard
    ISO 2431
  • Range
    10 - 40 cSt
  • Efflux Time
    30 - 100 sec
  • Certificate
  • Orifice Diameter
    3 mm







  • Place flow cup in a precisely horizontal position using ring stand or temperature control jacket
  • Close orifice
  • Pour in test liquid
  • Draw a clean glass plate over the rim of the cup, removing superfluous liquid into the overflow reservoir and closing the cup
  • Remove glass plate horizontally
  • Open the orifice and start the stopwatch simultaneously
  • Stop the watch with the first break in the efflux stream
  • Repeat the measurement three times, each with a new sample of the same material


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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