Moldover, M.
, Schmidt, J.
, Gillis, K.
, Mehl, J.
and Wright, J.
(2014),
Microwave Determination of the Volume of a Pressure Vessel, Measurement Science and Technology, [online], https://doi.org/10.1088/0957-0233/26/1/015304
(Accessed January 20, 2025)
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Microwave Determination of the Volume of a Pressure Vessel
Published
Author(s)
, , , James B. Mehl,
Abstract
Using microwave techniques that are scalable to very large volumes, we measured the interior volume of a 0.3 m3, commercially-manufactured, pressure vessel with an uncertainty of 0.05 %, as confirmed by independent, more-accurate, gas-expansion measurements. This pressure vessel (or a much larger one of a similar design) could be used as either a calibrated volume standard or as a gas source and/or a gas collector for the calibration of gas-flow meters. In addition, we determined the expansion of the vessel with temperature (dV/dT)p/V = (35.3{plus or minus}1.9)×10-6 K-1 and we estimated the pressure expansion (dV/dp)T/V = 0.9×10-3 MPa-1. The volume measurement did not require careful thermostatting; its uncertainty was dominated by imperfect modeling of the volume's shape. (The estimated uncertainties are one standard uncertainty with coverage factor k = 1 corresponding to 68 % confidence level.)Citation
Measurement Science and Technology
Volume
26
Pub Type
Journals
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Keywords
volume, pressure vessel, flow metrology, flow calibrations, microwave resonances, gas metrology
Citation
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Created December 9, 2014, Updated November 10, 2018