Process and interferometric device for detecting and measuring the concentration, in a single operation, of all gases, having almost periodic absorption structures, contained in a gaseous mixture, each of the gases being associated with a characteristic path difference. Luminous flux is analyzed after...http://www.google.ca/patents/US5040895?utm_source=gb-gplus-sharePatent US5040895 - Process for the simultaneous detection of several gases in a gaseous mixture, and equipment for using the process
