Cryogenic air sampler

Details Cryogenic air sampler Cryogenic air sampler

1979-12-21

1981-08-18

Swisher, S. Clement

Measuring and testing

Sampler, sample handling, etc.

With heating or cooling

62 555, 7386451, G01N 124

Patent

active

042839483

ABSTRACT:
Environmental gases, e.g. air are collected in an apparatus wherein a sample bottle containing a metering orifice for admitting the gas is contained within and cooled by a bath of liquid cryogen thus creating a partial vacuum inside the bottle to draw gas into the bottle where it is condensed and stored. The apparatus includes a source of cryogenic refrigeration disposed in an evacuated space above the liquid cryogen to condense liquid cryogen boil-off. By combining evacuation and cryogenic refrigeration the sample bottle holder can be rapidly cooled to operating temperature.

REFERENCES:
patent: 3472038 (1969-10-01), Staas
patent: 3938391 (1976-02-01), Winkler
patent: 4195524 (1980-04-01), Hansen

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