Cryogenic pump and air sampler

Details Cryogenic pump and air sampler Cryogenic pump and air sampler

1980-10-17

1982-07-06

Swisher, S. Clement

Measuring and testing

Sampler, sample handling, etc.

With heating or cooling

G01N 114

Patent

active

043376690

ABSTRACT:
A sampling unit, especially for stratospheric air sampling when carried aloft by balloon or another vehicle, comprises a liquid coolant reservoir within an evacuated vessel and provided with a cryogenically cooled adsorber for maintaining the vacuum. Nozzles in the vessel wall can be selectively opened and closed to allow samples to be drawn over cooled fingers on which components of the sample are frozen or sublimed. A vacuum gate can be connected to the device for removal of the cold fingers for transfer to a spectrometer.

REFERENCES:
patent: 3579998 (1971-05-01), Thibault
patent: 4283948 (1981-08-01), Longsworth
Lueb, R. A. et al., Balloon--borne Low Temperature Air Sampler, Review of Scientific Instruments, vol. 46, No. 6, Jun. 75 pp. 702-705.

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