Flow controller

Details Flow controller Flow controller

1982-11-12

1984-10-16

Kreitman, Stephen A.

Measuring and testing

Gas analysis

Gas chromatography

137114, G01N 3100

Patent

active

044767080

ABSTRACT:
A flow controller primarily for breathing gas analysis has a gas flow circuit leading from a breathing air inlet to a gas analyzer and to a vacuum source. Another gas is bled into the circuit between the breathing air inlet and a point upstream of the vacuum source. Such other gas is precluded from flowing upstream in the circuit toward the gas analyzer by making the intervening flow path or conduit of suitable dimensions to have a Peclet number at least equal to 4 and preferably greater than 4 and about 6.

REFERENCES:
patent: 3465753 (1969-09-01), Levy
patent: 3482431 (1969-12-01), Mochizuki
patent: 3566673 (1971-03-01), Kogan
patent: 3701280 (1972-10-01), Stroman
patent: 3771348 (1973-11-01), Villarroel
patent: 3824168 (1974-07-01), Oswin
patent: 3901230 (1975-08-01), Henkin
patent: 4067328 (1978-01-01), Manley
patent: 4150670 (1979-04-01), Jewett
patent: 4249528 (1981-02-01), Mathes
patent: 4297871 (1981-11-01), Wright

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