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introducing the m-VROC II next generation viscometer
Eden ReidJanuary 17, 20232 min read

Press Release - Introducing m-VROC II

SAN RAMON, CA – January 17, 2023 – The original m-VROC® was officially released in 2009. It's been 13 years since our flagship viscometer was released and we have hundreds of customers using the viscometer to this day. Today, RheoSense, Inc. is proud to introduce the new m-VROC® II, the high-precision, industry-leading small sample viscometer - measuring viscosity for sample volumes as small as 15 microliters! 

The second generation m-VROC still measures viscosity with the highest accuracy (2% of reading) and repeatability (0.5% of reading), but is now equipped with sample retrieval and recovery. Sample retrieval refers to the reversal of flow to refill the test syringe with a portion of the loaded volume. The retrieval process allows for more extensive testing on a single loaded sample volume which can include multiple repeats, shear rates, and temperatures.  Sample recovery involves a final retrieval of the entire volume back into the test syringe so that the sample can be retained for further testing. 

m-VROC II measures shear rate ranges  from 0.86 ~ 2,020,000 across a wide temperature range (4 - 70°C), and can run a single sample measurement in under a minute! 

"Our team has actively been working on our new innovative viscometer. The m-VROC® II pushes the capabilities we’ve seen from our previous products providing a wider temperature range to test more types of samples. We are looking to utilize smaller sample volume to accelerate development across all industries. We look forward to innovating with our partners. ." - Alex Tiscareno, Senior Mechanical Engineer

m-VROC II provides viscosity characterization of both Newtonian and non-Newtonian samples, including: 

  • Volatile Chemicals
  • Oils and Lubricants
  • Conductive/ Graphene Inks
  • Electrolyte Solutions
  • Skincare Serums and Fragrances
  • Cannabis 
  • Proteins
    • Formulation
    •  Injectability
    • Opthalmic Solutions
    • Whole Blood/Blood Plasma & Serum  

The m-VROC II comes equipped with an intuitive software, allowing users to easily save and load protocols, perform shear rate and temperature sweeps, export data into PDF/Excel, and apply non-Newtonian corrections with the push of a button. This intuitive software is also 21 CFR part 11 compliant, providing multi-level user access (standard user, IT admin, super admin etc.) and ensuring data integrity, preventing users from potentially manipulating your data.

With the extreme repeatability and small footprint of VROC® technology, m-VROC II the ideal tool for all your research and routine viscosity measurements.

"I am excited about unlimited sample testing using only 15 microliters, ease of use, small footprint and exceptional VROC accuracy and repeatability" - Rick Paulino, Regional Sales Manager


m-VROC II will be available for demonstration at the following upcoming events:

Additional Resources:

View Press Release in PDF

Press contact:

Grace Baek

RheoSense, Inc.


(925) 866-3808




ABOUT RHEOSENSE: A global high-tech instrument company based in the Bay Area in California. Our innovative viscometers feature patented Viscometer/Rheometer-on-a-Chip (VROC®) technology. Utilizing state-of-the-art MEMS (Micro-Electro-Mechanical Systems) and microfluidics breakthroughs, our instruments offer the smallest sample volume per measurement, coupled with exceptional ease of use and accuracy. We are the leader in providing viscometers to the biotechnology, pharmaceutical, and emerging protein therapeutics industries. RheoSense instruments have been rigorously tested, approved, and adopted worldwide by Fortune Global 500 companies and leading research universities.

Eden Reid

Eden Reid is the RheoSense Senior Marketing Associate. She has a Bachelor's of Science degree in Biology from the University of California, San Diego and has over 5 years of marketing experience.