Survey of micromanometers

Abstract

Contents 1. 4.3.2. Deflection not amplified 20 4.3.3. Force balance systems 21 4.4. Optical transducer 21 4.4.1. Light beam transducer 21 4.4.2. Interferometric 23 4.4.3 Photoelectric 24 4.5 Capacitance transducer 24 4.5.1.Theory 24 4.5.2. Electrodes and pressure-sensitive elements 26 4.5.3. Measurement circuits 26 4.5.3.1. Capacity bridge balanced, change in capacitance measured 27 4.5.3.2. Capacity bridge unbalanced 27 4.5.3.2.1. Current measured 27 4.5.3.2.2. Voltage measured 27 4.5.3.3. Resonant capacity circuit, resonance maintained 28 4.5.3.3.1. Capacitance measured .-28 4.5.3.3.2. Frequency change measured 28 4.5.3.3.3. Beat frequency measured 28 4.5.3.4. Resonant capacity circuit; unbalanced current measured 28 4.5.3.5. Electic element null restored 29 4.5.3.5.1. Electrostatic voltage restores null 29 4.5.3.5.2. Pressure restores null -30 4.5.3.5.3. Spring force restores null 30 4.5.4. Performance factors 31 4.5.4.1. Sensitivity, linearity, and stability 31 4.5.4.2. Temperature effect 4.5.4.3. Gas composition 32 4.5.4.4. Gas adsorption 32 4.5.4.5. Ionization of gases 32 4.5.4.6. Variation of null with pressure 32 4.5.4.7. Stray capacitances 32 4.5.4.8. Overpressure 32 4.6. Inductance transducers 33 4.6.1. Differential transformer transducer 33 4.6.2. Mutual inductance transducer _ 33 4.6.3. Variable reluctance transducer 34 4.7. Strain gage transducers 4.7.1. Unbonded strain gage micromanometers 4.7.2. Bonded strain gage micromanometers 4.8. Electrical conductance manometer 4.9. Microwave null detector 4.10. Vacuum tube transducer . _ 4.11. Microphone micromanometers 4.12. Vibrating wire gage 5. Piston gages 5.1. Tilted, air-lubricated piston gages 5.2. Vertical piston gages 5.3. Piston-type pressure amplifier 6.

A New Method of Obtaining Structural Information from 2M Exchange NMR and NQR Spectra of Powders

“…It seems likely that our procedure of calculating the 2М exchange singularities differs from the Brombacher procedure [6]; the development of the latter took a long time. We have solved the problem for arbitrary Euler's angles α, β, and γ and nonzero asymmetry parameters η 1  and η 2.…”

“…The nonzero asymmetry parameter η causes a complex structure of the singularities in the 2М correlation NMR and NQR spectra of powders. For a long time there has been no analytical method of determining these singularities in arbitrary cases.Brombacher [6] was the first to describe analytically the complex structure of the singularities in the 2М exchange NMR spectra of powders. Unfortunately, he has not published his results and presented only a commercial program on his private Internet page.…”

“…Brombacher [6] was the first to describe analytically the complex structure of the singularities in the 2М exchange NMR spectra of powders. Unfortunately, he has not published his results and presented only a commercial program on his private Internet page.…”

Rare earth ion activities by static vapor and specific ion electrode measurements with application to a single component solvent extraction system

“…Further refinements were made by Shankman and Gordon in their work on sulfuric acid (84) In the nature and treatment of the manometer fluid used. A recent survey by Brombacher (10) evaluates various micromanometer designs which could be adapted for this technique.…”

“…Multiplying Equation 9by the quantity 1000/W^n^ (W^ is the solvent molecular weight) yields: dG^ = -MgdCg -m|.dG(. (10) where mg and tr^, are the molarities of the cationic and anionic species.…”