G - Physics – 01 – N
Patent
G - Physics
01
N
73/57
G01N 21/01 (2006.01) G01N 21/35 (2006.01)
Patent
CA 1036384
NON-DISPERSIVE MULTIPLE GAS ANALYZER ABSTRACT OF THE DISCLOSURE A gas analyzer for measuring separately the quantities of two or more gas species present in a sample. The analyzer uses a rotating gas cell having a pair of chambers which are alternately inserted into a beam of radiant energy. At least one chamber contains a quantity of each of the gas species to be analyzed at suitable pressures. After passing through the rotating gas cell, the radiant energy is passed through the sample region and is then split into two or more beams by suitable optics. Each beam is passed through a band pass filter and sensed by a photo- detector. Thus there will be a photodetector for each gas species to be measured and the associated filter is designed to have a bandpass that will admit radiant energy over a spectral region where the gas species displays suitable absorption lines. The electrical output from each photodetector can be analyzed electronically and related to the quantity of a particular gas species in the sample.
228342
Burch Darrell E.
Pembrook John D.
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