RheoSense marks 25 years with VROC viscosity technology

RheoSense is celebrating 25 years of viscosity measurement technology in 2026, highlighting its rectangular slit viscometry platform and VROC instruments used by R&D and QA/QC teams across industries. The milestone underscores how the company has tried to make viscosity testing more accurate, require smaller samples and support a broader set of fluid-testing needs.

Why it matters: - RheoSense says viscosity measurement affects any product that flows, from therapeutics to food and other industrial fluids. - The company’s rectangular slit viscometry approach is designed to make viscosity testing more accurate and use much smaller sample volumes. - The milestone highlights a niche lab tools market where accuracy, sample size and workflow speed can affect product development and quality control.

What happened: - RheoSense marked its 25th anniversary in 2026. - The San Ramon, California, company says it pioneered rectangular slit viscometry and first-principle viscosity measurement through its VROC® platform. - The company says the approach is documented in U.S. Pharmacopeia chapter 914. - RheoSense introduced VROC in 2009 and says the technology was the first new approach to viscosity measurement in more than 45 years.

The details: - RheoSense offers a VROC product line that includes the m-VROC II, initium 1++, microVISC PRO and microVISC models. - The company also provides viscosity sample testing services. - RheoSense says its viscometers are built on absolute viscosity measured through first-principle methods. - The company says those instruments also support specialized measurements such as extensional viscosity and intrinsic viscosity. - RheoSense says its devices hold the record for the smallest sample size in accurate viscosity measurement. - The company works primarily with R&D scientists and QA/QC teams. - RheoSense says its customers use the tools to support product development and testing across multiple industries. - RheoSense says VROC technology is used by Fortune 500 companies worldwide in research, development and quality assurance. - The company lists Pfizer, Johnson & Johnson, Amgen and Eli Lilly among notable clients. - RheoSense says it has continued releasing new VROC viscometers since 2001, with improvements in range, accuracy and features.

Between the lines: - The anniversary announcement is also a reminder that viscosity testing has moved from a relatively static field to one shaped by smaller sample requirements and more specialized measurement needs. - Customer quotes in the release point to two selling points: responsive support and measurement precision. - RheoSense is positioning its support team as part of the product, not just an add-on.

What's next: - RheoSense is likely to keep building on the VROC platform with new instrument releases and service offerings. - The company’s next growth push appears aimed at labs that need precise viscosity data with less material and faster turnaround. - RheoSense will continue targeting scientists and quality teams in industries that depend on fluid behavior for product performance.

The bottom line: - RheoSense is using its 25-year milestone to reinforce a simple pitch: smaller samples, more accurate viscosity data and stronger support for labs that need both.