Fluidan’s Unique Technology

RheoStream® is a fully automated capillary rheometer in a box!

A precision pump in the instrument controls the sample flow rate as it passes through the capillary.

RheoStream measures the viscosity profile typically every 1-2 minutes: A sample automatically flows into the instrument, and it is being measured in a sequence of steps. When done, a new sample is taken – every sample is 5 ml.

Unlike any other process rheometer RheoStream takes full control of the sample. That gives important benefits:

  • The sample temperature is controlled to the desired level
  • The viscosity is measured across a controlled range of shear rates

The output from RheoStream is the viscosity at 3 shear rates. Or you can get the parameters from a model of the viscosity curve (Bingham, Casson, etc.).

RheoStream Graphical User Interface




Download our brochure about RheoStream

Frontpage of brochure - RheoStream process rheometer

This is How RheoStream® Works

By following the numbers on the picture (right), you can follow the progress of a measurement:

① A sample is drawn from process equipment
② The syringe pump controls flow rates in pulses ③
④ A preheater/cooler ensures a steady temperature of the measurement
⑤ The liquid flows through a thin tube (capillary)
⑥ A pressure difference (ΔP) is measured for each pulse
⑦ The instrument computer converts pressure signals into viscosity values
⑧  Displays results on the user interface
⑨ Spent sample is collected as waste


This video illustrates the liquid flow in the instrument: https://fluidan.com/3d-video-shows-how-rheostreamworks/

Fluidan ApS
CVR: 36392355


Fridolin Okkels, CTO
+45 2537 8686

Anders L. Østergård, CEO
+45 2374 5664

Email: write an email


Fridolin Okkels, CTO
+45 2537 8686

Anders L. Østergård, CEO
+45 2374 5664

Email: info@fluidan.com


Diplomvej 381
2800 Kgs. Lyngby

By using the website you agree to the use of cookies more information

The cookie settings on this site are enabled to give you the best experience. If you continue to use the website without changing your cookie settings or clicking Accept, this is considered your acceptance