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Gas pressure reduction circuits
Review of Scientific Instruments, 1989This note describes passive pressure reduction devices for use with sensitive instruments. Two gas circuits are developed which not only provide a pressure reduction under flow demand, but also limit the maximum pressure that the source can exert under a no-flow condition.
D. W. Guillaume, D. DeVries
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Constant-Pressure Gas Porosimeter
Journal of Petroleum Technology, 1961Abstract A method and apparatus for measuring gas porosities of rocks are described. The apparatus can be assembled from commercially available components. In principle, measurements are made by volume substitution at constant pressure. The maximum error is not more than 0.3 porosity per cent.
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The Journal of the Acoustical Society of America, 1990
A method and an apparatus are provided for measuring the pressure of a gas within a sealed vessel. A sonic transducer is used to apply an oscillating force to the surface of the vessel. The frequency of the ultrasonic wave is swept through a range which causes resonant vibration of the gas in the vessel. A receiving transducer measures the amplitude of
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A method and an apparatus are provided for measuring the pressure of a gas within a sealed vessel. A sonic transducer is used to apply an oscillating force to the surface of the vessel. The frequency of the ultrasonic wave is swept through a range which causes resonant vibration of the gas in the vessel. A receiving transducer measures the amplitude of
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2012
In order to solve the evolution equations [Eqs. (4.36)–(4.38)] for the variables ρ, T, and X, we need to be able to express the auxiliary functions P, F, and q in terms of these variables. Additional physics must be included to accomplish this.
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In order to solve the evolution equations [Eqs. (4.36)–(4.38)] for the variables ρ, T, and X, we need to be able to express the auxiliary functions P, F, and q in terms of these variables. Additional physics must be included to accomplish this.
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High Pressure Gas Scintillators
IRE Transactions on Nuclear Science, 1960Observations of scintillation pulse heights have been made at pressures up to 75 atmospheres in xenon and argon, and in mixtures of nitrogen and xenon, nitrogen and argon, and neon and xenon. Diphenyl stilbene was used as a wavelength shifter. The most salient feature is that in all cases pulse height is approximately independent of pressure at ...
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Industrial & Engineering Chemistry, 1962
E. S. Hodge, C. B. Boyer, F. D. Orcutt
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E. S. Hodge, C. B. Boyer, F. D. Orcutt
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