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Flow Calibration Services at NIST



John D. Wright, Pedro I. Espina


The Fluid Flow Group of the National Institute of Standards and Technology in Gaithersburg, Maryland offers calibration services for flow meters used in gas, water, and liquid hydrocarbon. Gas flow meters are calibrated using PVTt systems, piston provers, or bell provers for flows ranging from 0.04 L/min to 78,000 L/min. A critical nozzle based gas flow standard allows performance testing of flow meters in gas mixtures at temperatures up to 700 K for flows ranging from 60 L/min to 6,200 L/min. The water flow standard is a static gravimetric system that handles flows up to 38,000 L/min. A dynamic gravimetric flow standard provides hydrocarbon liquid flow calibrations between 0.04 L/min and 1,500 L/min. Further details of these calibration services are documented including the principle of operation and measurement uncertainties.
ISA Conference


bell prover, displacement prover, flow calibrations, flow standards, gas flow / water flow, gas mixture, gravimetric prover, hydrocarbon flow, piston prover


Wright, J. and Espina, P. (2000), Flow Calibration Services at NIST, ISA Conference, [online], (Accessed June 15, 2024)


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Created April 1, 2000, Updated February 17, 2017