Title: NIST Develops Advanced Liquid Flow Standard for Precision Measurements
The National Institute of Standards and Technology (NIST) has created a state-of-the-art liquid flow standard capable of measuring water flows from 0.2 to 15 liters per second with an impressive uncertainty of less than 0.03%. This standard is used for calibrating commercial flow meters and serves as a research tool to improve measurement techniques.
The 15 kg/s liquid flow standard uses a dynamic gravimetric method to measure water flow by determining the rate of change of buoyancy-corrected mass collected in a tank on a weigh scale. It can calibrate meters with pulse outputs ranging from 0.5 to 2 inches and is particularly suited for Coriolis meters, though it can accommodate other types as well.
The standard’s major components include a flow generation and control system, a test section for the meter under test, and a dynamic weighing system. The collection tank is designed to minimize forces on the weigh scale while directing water flow into the tank.
Source: https://www.nist.gov/laboratories/tools-instruments/liquid-flow-standards
Keywords: liquid flow, dynamic gravimetric, flow meter
