by Richard Steven & Joshua Kinney
Cone DP meters are a member of the generic DP flow meter family. Used extensively throughout different industries for quarter of a century, the cone meter is now a mature technology with multiple manufacturers throughout the world. There is now a cone meter international standard, ISO 5167-5. The cone meter has distinct pros and cons when compared to other DP meter designs. This article describes the cone meter operating principle and the associated pros and cons compared to other DP meters. Particular attention is paid to cone meter calibration requirements, cone meter resistance to disturbed inlet flow, and the cone meter internal verification system.