MEMS enable rapid viscosity measurements in RheoSense viscometer - Small Times
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MEMS enable rapid viscosity measurements in RheoSense viscometer

(January 7, 2011) -- RheoSense Inc. released µVISC (micro VISC), the newest viscometer utilizing VROC technology. VROC (Viscometer-Rheometer-On-a-Chip) is a MEMS microfluidic chip-based viscometry technology.

This instrument provides high accuracy and repeatability in viscosity measurement. The µVISC is reportedly fast and easy to use, and can satisfy industry’s growing demand for an increasingly efficient quality control protocol. The measurement process consists of loading a sample into a disposable pipette, mounting the pipette, and running tests.

Measurement results, including data necessary for advanced analysis, are displayed in less than a minute for most samples.  Features of the µVISC include:

  • viscosity (in mPa-s or cP), shear rate, and sample temperature measurement
  • only 100 µL needed per measurement
  • no evaporation
  • accuracy exceeds 1% of Full Scale or 2% of reading
  • repeatability within 1%
  • measurements take as little as a minute
  • a wide range of viscosities is measurable (0.2 cP ~ 5,000 cP) with hot-swappable sensor cartridges
  • lightweight (only 1.5 lbs) and portable (powered by a rechargeable Li-ion battery)
  • cleaning is unnecessary when continuously testing analogous or miscible samples.
  • up to 20 tests logged, each with a user-definable sample ID
  • multiple operational modes to assist any user, whether beginner or advanced
  • automated cleaning mode

The operating principle of this technology is well-known for its simplicity and accuracy in the field of rheology, according to the company, which notes that some ISO test methods also adopt this principle.

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