Sample chamber for gas analyzer

Details Sample chamber for gas analyzer Sample chamber for gas analyzer

1979-03-12

1980-06-03

Swisher, S. Clement

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

734215A, 356438, G01N 2126

Patent

active

042055504

ABSTRACT:
In a duct having a gas of predetermined density and viscosity flowing therethrough at a predetermined velocity, a sample chamber for a gas analyzer for use in such a duct is disclosed and includes an inner chamber having a passage therethrough and an outer chamber at least partially surrounding the inner chamber and having a pair of apertures, with the outer housing being movable by suitable apparatus between one position in which the outer housing apertures are generally aligned with the inner chamber passage and another position in which the outer housing apertures are spaced from the inner chamber passage, the outer housing and inner chamber being configured and dimensioned such that the Reynolds number for the flow of duct gases over the outer housing and inner chamber is sub-critical when the outer housing is in its other position with its apertures spaced from the inner chamber passage.

REFERENCES:
patent: 1969626 (1934-08-01), Simon
patent: 3847487 (1974-11-01), Boll
Webb et al., True On-Line and Span Determination for Continuous Emission Monitoring System.

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