Appearance & Measurement Experts since 1986


Industries & Applications
  • Paints & Coatings

ASTM D1200 Viscosity Flow Cup

  • 2.1mm – 5.8mm orifice diameter
  • 10 – 1200 cSt viscosity range
  • 30-100 sec flow times
  • Supplied with a certificate of conformity
  • Sheen 406/1, 406/2, 406/3, 406/4 & 406/5 equivalent


Viscosity Flow Cups

The Rhopoint Flow Cups are designed to accurately measure the viscosity of paints, inks, varnishes and similar products.

What is viscosity?

The term “viscosity” is a parameter that describes a fluids resistance to flow. This resistance is a measure of the friction and the forces of interaction between the layers of a fluid. This friction is apparent when one layer of fluid is made to move against another The greater the friction, the greater the amount of force required to cause the movement – known as “shear”.

The process of flow through an orifice can often be used as a relative measurement and classification of viscosity. This measured kinematic viscosity is generally expressed in seconds of flow time which can be converted into centistokes (cSt) using a viscosity calculator.

Flow cup cross section diagram

Manufactured from high grade aluminium alloy with stainless steel orifices (where indicated), the Rhopoint Flow Cups are available with a range of UKAS / ISO 17025 certified standard oils to confirm the flow cup is measuring within specification.

Paint pouring into a paint can - Flow cup measurement
Varnish being brushed onto wood - Flow cup measurement
Printing ink being tested for viscosity - Flow cup measurement


Instrument Information
MaterialHigh grade aluminium alloy, stainless steel orifice
Commodity Code9027 8091
Weight200 - 300g (depending on model)
ProductOrder codeOrifice diameterViscosity rangeFlow times
DIN flow cupASTM No.1 - 2.1mm (0.08”)RL-A-FC-ASTM12.1mm (0.08”)10 - 35cSt55s - 100s
DIN flow cupASTM No.2 - 2.8mm (0.11”)RL-A-FC-ASTM22.8mm (0.11”)25 - 120cSt40s - 100s
DIN flow cupASTM No.3 - 3.4mm (0.13”)RL-A-FC-ASTM33.4mm (0.13”)49 - 220cSt30s - 100s
DIN flow cupASTM No.4 - 4.1mm (0.16”)RL-A-FC-ASTM44.1mm (0.16”)70 - 370cSt30s - 100s
DIN flow cupASTM No.5 - 5.8mm (0.23”)RL-A-FC-ASTM55.8mm (0.23”)200 - 1200cSt30s - 100s
DIN flow cupThe orifices are manufactured from stainless steel.


Datasheets & Manuals

Application Notes & White Papers

Answers to common questions about our instruments and measurements

Why measure gloss?

Gloss is an aspect of the visual perception of objects that is as important as colour when considering the psychological impact of products on a

Read More »

What is RSpec?

RSpec is the peak reflectance measured over a very narrow angular band in the specular direction (+/-) 0.0991º. RSpec is very sensitive to any texture

Read More »

Please email me a price confirmation and product summary

Please note, this is NOT a quotation, just a confirmation of the price when purchased in the UK exclusive of VAT/duties

Official Quote Request

Official Quote Request

ASTM D1200 Viscosity Flow Cup