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The smallest sample viscometer.

Upgrade your viscosity testing with our easy-to-use small sample viscometer. Test and retest with as little as 10 μL.

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Small Samples
Samples as small as 10 μL
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Retest and retrieve your samples 
High Shear

Run shear rate sweeps automatically

Non-Newtonian Samples
Test Newtonian and non-Newtonian fluids

Need Higher Throughput?

Check out the VROC initium one plus.

Test up to a 96 well plate of samples in less than 24 hours with samples as small as 19 μL!

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m-VROC II Viscometer — Controlled Shear Rates and Small Samples

m-VROC II is the next generation of leading semi-automated, small sample viscometer. Capable of the most demanding applications including small sample protein therapeutics, m-VROC II features the widest dynamic range viscosity measurement with as little as 10 microliters of sample. The m-VROC II allows you to get the most out of your samples with the ability to retest and reuse a single sample for multiple measurements.

This product can be configured based on your applications and there are multiple chip options you can choose from. Here is the chip selection guide!

VROC®️ Technology


Understanding Fluid Behavior — Measuring Absolute Viscosity

With VROC® Technology, RheoSense took the standard principles of rheometry and created a dynamic micro-sample viscometer by adding microfluidics while reducing the size of the device with MEMS (micro-electrical mechanical systems) manufacturing. The result was a new platform which offers capabilities that are well beyond the limits of conventional viscometers in not only the sample volumes required, but the measurement range and precision.

VROC Chip & Board
Health care researchers working in lab
"m-VROC® is great instrument and I am really enjoying using it."
  • Shear Rate Sweep - 0.86 ~ 2,020,000 1/s
  •  Temperature Sweep
  • Software Compatibility
  • Barcode Reader Function
  • Temperature Sensor Built-In
  • 21 CFR Part 11
  • Chips Specific to Your Application
  • Minimum Sample Volume – 10 µL    
  • Characterization of Newtonian and Non-Newtonian Solutions
  • Wide Viscosity Range:  2 ~ 100,000 mPa-s (or cP)
  • Temperature specification of 4°C – 70°C*
  • Accuracy up to 2% of Reading
  • Repeatable Measurement up to 0.5% of Reading
  • Compatible chips can be swapped out and automatically cleaned with the RheoSense Chip Cleaning Station


Our instruments are fully supported based on service plans. Select the best option for you below.


Our basic support package covers a single chip repair or calibration, an onsite inspection of your instrument, onsite and remote training sessions, and up to $10,000 credit towards repairs to your instrument.


Our mid-tier support package covers two chip repairs or calibrations, an onsite inspection of your instrument, two onsite and remote training sessions, and unlimited mail in repairs to your instrument.

This package also includes 20 hours of dedicated protocol development to help your team get the most out of your instrument every year.