G - Physics
01
N
73/55, 73/58, 73
G01N 21/27 (2006.01) G01N 21/39 (2006.01)
Patent
CA 1193468
ABSTRACT In a method for remote quantitative monitoring of a selected gas in a gaseous environment by passing through the environment radiation of a wavelength absorbable by the selected gas, an improvement comprises taking a sample of a part of the gaseous environment through which the collected radiation does not pass, and causing the sample to be introduced into a position through which the collected radiation does pass, thereby to get absorption of the radiation according to the quantity of the selected gas in the sample.
419096
Ballantyne Donald G.
Imperial Chemical Industries Plc
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