Back in 2014. RheoSense had announced that we are formally approved by United States Pharmacopeia (USP). Formally known as the rectangular slit viscometer, the VROC® technology information is accessible via US 39-NF 34. A recent article published by the USP on Pharmtech explains and confirms their recommendations by ensuring viscosity tests are conducted using suitable viscometers in the updated chapters, including chapter 914.
H. Wang, L. Block, and C. Sheehan, "Characterization of Polymeric Excipients," Supplement to Pharmaceutical Technology 41 (4) 2017.