Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1979-03-12
1980-06-10
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
042066301
ABSTRACT:
A sample chamber for a gas analyzer for use in a duct containing gases to be analyzed is disclosed and includes a flow directing apparatus formed by a pair of spaced members which form a passage therebetween in the form of a converging diverging throat and an outer housing at least partially surrounding the flow directing apparatus. This outer housing has at least a pair of apertures and is movable by a suitable apparatus between one position in which the outer housing apertures are generally aligned with the flow directing passage and another position in which the outer housing apertures are spaced from the passage with non-apertured portions of the outer housing positioned across the ends of that passage.
REFERENCES:
patent: 1969626 (1934-08-01), Simon
patent: 3847487 (1974-11-01), Boll
Webb, True On-Line and Span Determination for Continuous Emission Monitoring System.
Econics Corporation
Swisher S. Clement
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