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Revolutionizing material characterization with viscosity

Providing the best viscometer solutions to industries for proper material characterization.


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

  • 2001


    RheoSense was founded in 2001 by Dr. Seonggi Baek. Since the beginning, our patented VROC® technology is accredited in the scientific field as the innovative method of bringing ease when it comes to viscosity measurements

  • 2009


    Production of flagship small sample m-VROC® and microVISC™ viscometers

  • 2013


    Release of extensional viscometer capable of measuring apparent extensional viscosity

  • 2016

    Automatic Viscometer

    RheoSense, Inc. introduces the first automatic viscometer equipped with automatic sample loading and cleaning. The viscometer can measure absolute viscosity as a function of shear or temperature, which allows unique viscosity fingerprinting of your samples.

  • 2020

    VROC® initium one plus

    RheoSense, Inc. introduces the VROC initium one plus - the leading automatic viscometer that measures viscosity with the highest accuracy (2% of reading) and repeatability (0.5% of reading) and acts as a workhorse for your material characterization.

  • 2020

    Chip Cleaning Station

    Release of the highly requested chip cleaning station, capable of cleaning VROC® chips in  under 10 minutes!

Why measure viscosity?

It's never too late to measure accurate viscosity measurements but it's also never too early! Join hundreds of industry and academic professionals. Get a head start on your research and quality control processes with accurate measurements. Work smart, not hard!


60 Plus more application notes
458 Papers from customers and counting!
25 Recorded Webinars

Success Stories

"Darn, that little thing works great [microVISC]. Good job! I did a couple of known control samples, which measured bang-on exact with literature values. And then had no difficulties with my biological materials."
Dr. David KrevorSlip Chip
"At Arizona State University, our research focuses on developing ink chemistries for additive manufacturing from the nanometer to the centimeter scales. To achieve this goal, we must precisely control the rheology properties of our inks. The RheoSense microVISC™ has been instrumental in our lab to measure and monitor the viscosity of our research inks throughout the day. The tool is extremely simple to use and its small sample volume saves money for some of the more expensive inks. Additionally, the use of affordable, disposable syringes saves us considerable time compared to cleaning a traditional rheometer ten times a day.
Overall, we would recommend this tool to other groups looking for an easy-to-use rheometer for daily lab use. "
Professor Owen HildrethArizona State University

"I would like to mention (m-VROC®) is a great instrument and I am really enjoying using it"

Mahoom FardCanopy Growth

How will we use the information about you?

Handled with the utmost confidentiality. Your data will be stored to send regular technical announcements including application notes, webinars, white papers. We do not sell data or will be providing it to third parties with the exception of our international distributors in the cases which the inquiry is interested in a formal quote or anything related to the international business respective of the international country.

Clients & Partners

RheoSense instruments have been rigorously tested, approved, and adopted worldwide by
Fortune Global 500 companies and leading research universities.


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