Measuring and testing – Gas analysis – Gas chromatography
Patent
1983-01-24
1984-04-17
Goldberg, Gerald
Measuring and testing
Gas analysis
Gas chromatography
G01N 3106
Patent
active
044426984
ABSTRACT:
A monitoring system for determining the concentration of oxygen in the product gas of an oxygen enriching system comprises a plurality of pneumatic nor gates. Means are provided for coupling the outlet port of each gate to the control port of the subsequent gate to form a closed loop and a plurality of molecular sieve beds are pneumatically connected one each to the control port of the nor gates. The molecular sieve beds adsorb oxygen from the product gas to attenuate the rate of pressure change in the control ports and thus, the oscillation frequency of the monitor. The oxygen concentration of the product gas may be inferred from the oscillation frequency of the monitor.
REFERENCES:
patent: 2760511 (1956-08-01), Greeff
patent: 3151623 (1964-10-01), Riordan
patent: 4205700 (1980-06-01), Bouteille
Goldberg Gerald
Kovalick Vince
Litton Systems Inc.
Ribando Brian L.
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