High Precision, High Pressure Mercury Differential Pressure Manometer

The author reviews methods of calibrating low-differential (25–300 in. H2O) D.P. transmitters at high (up to 3000 psig) static pressure. Various test methods are described along with discussion of their merits. Included are use of one or more deadweight testers (gas or liquid) and use of a high-pressure mercury manometer as a standard. Five D.P. transmitters of different construction are tested and their static span-shift performance reported.

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High precision spectroscopy of SF6 with cw high pressure tunable CO2 laser

Optics Communications ◽

10.1016/0030-4018(73)90068-0 ◽

1973 ◽

Vol 7 (4) ◽

pp. 410-411 ◽

Cited By ~ 20

Author(s):

I.M. Beterov ◽

V.P. Chebotayev ◽

A.S. Provorov

Keyword(s):

High Pressure ◽

High Precision ◽

Co2 Laser ◽

Precision Spectroscopy ◽

Tunable Co2 Laser

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High-precision silicon differential pressure sensor monolithically integrated with twin diaphragms and micro over-range protection structures

Proceedings IEEE Thirteenth Annual International Conference on Micro Electro Mechanical Systems (Cat. No.00CH36308) ◽

10.1109/memsys.2000.838541 ◽

2002 ◽

Cited By ~ 1

Author(s):

S. Kato ◽

T. Watanabe ◽

C. Kato ◽

Y. Suzuki ◽

K. Kamimura ◽

...

Keyword(s):

High Precision ◽

Pressure Sensor ◽

Differential Pressure ◽

Monolithically Integrated ◽

Differential Pressure Sensor ◽

Protection Structures

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A Counter System for High-Precision 14C Dating

Radiocarbon ◽

10.1017/s0033822200011978 ◽

1989 ◽

Vol 31 (03) ◽

pp. 399-406 ◽

Cited By ~ 47

Author(s):

Ede Hertelendi ◽

Éva Csongor ◽

Laszlo Zaborszky ◽

Jozsef Molnar ◽

Janos Gal ◽

...

Keyword(s):

High Pressure ◽

High Precision ◽

Radiocarbon Dating ◽

Data Evaluation ◽

14C Dating ◽

Counting Period ◽

Low Level ◽

Electrolytic Copper ◽

Proportional Counters ◽

Better Than

A multicounter radiocarbon dating system was developed applying the experiences of the previous one-channel low-level counting facility. The counter system consists of nine electrolytic copper proportional counters of identical diameters with sensitive volumes of 0.35–0.7dm3 and filled with either methane at high pressure (6 bar) or CO2 at 1 bar. The inner counters are surrounded by an anticoincidence shield consisting of five multiwire proportional flat counters filled with propane. The pulses of the detectors are handled by integrated amplifiers, discriminators and anticoincidence units interfaced to a microprocessor-controlled data evaluation unit. Software is written in BASIC using ASSEMBLER sub-routines. The overall precision of the system for modern carbon samples using high-pressure methane-filled counters (B ≍ 0.7 cpm, S ≍ 14 cpm) is better than 4 after a counting period of seven days.

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Precision Transducer for High Pressure Infrared Measurements

Applied Spectroscopy ◽

10.1366/000370269774381030 ◽

1969 ◽

Vol 23 (2) ◽

pp. 157-159 ◽

Cited By ~ 5

Author(s):

J. V. Fox ◽

H. W. Prengle

Keyword(s):

High Pressure ◽

High Precision ◽

Strain Gauge ◽

Freezing Point ◽

Mathematical Function ◽

Ir Absorption ◽

Infrared Measurements ◽

Strain Gauge Transducer ◽

Pvt Measurements ◽

Semiconductor Strain

An externally mounted high pressure semiconductor strain gauge transducer of high precision is described which was used in connection with liquid ir absorption and PVT measurements up to 10 000 atm pressure. The transducer is nonlinear, but can be calibrated by a three point procedure, one point of which is the freezing point of mercury at 0°C, and fit to a derived mathematical function. The precision of the device is approximately 0.8 atm, with a repeatability of 5.5 parts in 10 000, at a level of 10 000 atm.

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