Real-time in situ multiple gas species sensing method

Details Real-time in situ multiple gas species sensing method Real-time in situ multiple gas species sensing method

1998-02-04

2000-04-04

Font, Frank G.

Optics: measuring and testing

By particle light scattering

356338, G01N 2100

Patent

active

060468092

ABSTRACT:
A method for sensing the concentrations of diatomic gases in a flow chamber is achieved by focusing an incident beam of light from a monochromatic light source on a point internal to the flow chamber through a transparent window. The incident excites molecules of the diatomic gas, resulting in emission of scattered light of particular characteristic frequency for each species of diatomic gas, due to the Raman principle. By collecting the scattered light beam from the flow chamber through the window and analyzing the intensity of the collected scattered beam at these characteristic frequencies, the relative concentrations of each of the diatomic gases may be determined.

REFERENCES:
patent: 5789256 (1998-08-01), Marlow et al.

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