Gas sampling devices

Details Gas sampling devices Gas sampling devices

1979-11-05

1981-11-03

Swisher, S. Clement

Measuring and testing

Gas analysis

Gas chromatography

7386302, 7386462, 128719, 128730, G01N 114

Patent

active

042978718

ABSTRACT:
A breath sampling device in which a main flow tube through which a subject blows is provided with a venturi restriction. The main flow tube communicates through a passage at the restriction to pressure sensing, constituent sensing, and expansible sample collecting chamber. A control responsive to pressure change delays the operation of the sampler and sensor until breath flow rate diminishes, thus insuring that sampling and sensing occur near the end of expiration.

REFERENCES:
patent: 3196689 (1965-07-01), Forrester
patent: 3238783 (1966-03-01), Wright
patent: 3395701 (1968-08-01), Bartlett
patent: 3661528 (1972-05-01), Falk

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