Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing gas sample
Patent
1990-10-09
1992-09-15
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing gas sample
422103, 137 88, B01L 300, B01L 1100, G05D 1100
Patent
active
051476126
ABSTRACT:
Apparatus for preparation of calibration gas mixtures comprises an accurate cylinder divided into first and second chambers for two gases to be mixed in exact proportions by a piston which can be displaced by a precise linear distance by a stepper motor driven micrometer; the piston has a valved passage to allow transfer of a thus precisely determined volume from the second chamber to gas in the first chamber at balanced pressures; stirrers, temperature and pressure sensors are provided, a device for introducing vaporized drops to the gas in the first chamber is provided. The apparatus can provide mixtures in the parts per million and parts per billion ranges and one or more apparatuses can be linked to a personal computer.
REFERENCES:
patent: 3158072 (1964-11-01), Detrez
patent: 4172670 (1979-10-01), Welker
patent: 4257439 (1981-03-01), Mayeux
patent: 4509409 (1985-04-01), Reeves
British Standard Methods for Preparation of Calibration Gas Mixtures, BS 4559, Part 3, 1983, ISO 6144-1981.
Blend Your Own Gas Standards Product Brochure, Astro International Corporation.
Kim Christopher Y.
Warden Robert J.
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