RheoSense is a biotechnology firm headquartered in San Ramon, California. The company specializes in creating industry-leading viscometers using their groundbreaking VROC® (Viscometer-Rheometer-On-a-Chip) technology. This technology, originally released in 2009, was the first new method of measuring viscosity in over 45 years. The methodology, now called rectangular slit viscometry, is documented in the US Pharmacopeia chapter 914 and makes measuring the viscosity of fluids exponentially simpler and more accurate. RheoSense’s patented rectangular slit viscometers use VROC® chips equipped with sensors to measure the viscosity of samples as they flow through the chip.

VROC technology is used in Fortune 500 companies around the world in their research, development, and quality assurance processes. Notable clients include Pfizer, Johnson & Johnson, Amgen, and Eli Lilly.

Since 2001, RheoSense has been reliably releasing new VROC viscometers with increasingly impressive ranges, accuracy, and features.