A summary of infra-red methods of gas analysis is presented. The experimental work which led to the development of an instrument for service applications is described. The properties of this final instrument are outlined, together with a résumé of performance characteristics for a number of applications.
W. G. FASTIE and A. H. PFUND, "Selective Infra-Red Gas Analyzers," J. Opt. Soc. Am. 37, 762-762 (1947)