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New e-VROC™ Viscometer Launched by RheoSense, Inc.

RheoSense, Inc. is proud to announce a new addition to the VROC™ family, e-VROC™ viscometer.

With the same small sample requirements and a wide dynamic range, e-VROC™ maintains the precision and accuracy of the m-VROC™ viscometer with one slight twist: the capability of measuring apparent extensional viscosity.

Extensional or elongational viscosity is ideal for studying the complex properties of many fluids used in industrial applications.

Figure 1

By monitoring the sample flow through a microfluidic contraction, the system measures the pressure upstream and downstream of a contraction using the MEMS pressure sensors and registers changes in the flow.

The fluid experiences shear flow in the straight channel and then an almost constant extension in the contraction zones as depicted in figure 1.

e-VROC™ capabilities include measuring extensional viscosity at high extensional rates and can be used in various applications such as:

  • Fiber Extrusion Spinnerets
  • Paint Rolling
  • Blow Molding
  • Ink Jet Printer Nozzles
  • Sheet or Film Drawing
  • Flow through a Porous Media

If you are interested in learning more about how e-VROC™ can improve your applications, visit our website.

About RheoSense, Inc.

RheoSense Inc., is a global viscosity measurement equipment manufacturer. Its VROC™ (Viscometer-Rheometer-On-a-Chip) technology is the only MEMSmicrofluidic chip-based viscometry technology in the world.

This innovation provides accurate, repeatable viscosity measurement using today’s technology to reduce device footprint and sample size and is being readily adopted in BioPharmaceutical, Blood, Ink and other applications.


  • Bio/pharmaceuticals
  • Chemicals
  • Coatings and paints
  • Petrochemical
  • Electronics
  • Food and beverage
  • OEM equipment manufacturers


  • Microliter-scale sample R&D
  • High shear rate R&D and QC
  • On-line QC
  • Custom applications
  • Portable QC
  • Viscosity indexing
  • High throughput analysis


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