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Title: Assessment Of Reproducibility And Linearity Of The Nmia Bell Prover Using A High Flowrate Sonic Nozzle Array
Author: Dr Khaled Chahine, Dr Mark Ballico
Source: Flomeko 2010
Year Published: 2010
Abstract: Critical flow Venturi, or sonic, nozzles are widely used in gas flow metrology as stable and convenient transfer standards. Once the nozzle coefficient has been determined by calibration against a primary standard, the mass flowrate can be determined by knowledge of the upstream gas composition and its pressure and temperature. As these can be determined with great precision, the mass flow achieved can be more reproducible than the nozzle calibration

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