Some Considerations in the Design of Double-Beam Analyzers for Industrial Control*

Analysis of Mixtures with Double-Beam Nondispersive Infrared Instrument

“…using nondispersive instruments for the analysis and control of the composition of mixtures. A number of nondispersive instruments have been described recently (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13). In general, they have advantages over dispersive instruments in simplicity, ruggedness, lower costs, and better suitability for plant or control laboratory application.…”

“…The application of instruments of this type to the solution of chemical problems is discussed in another paper (6). selective detector was used in the experimental work; however, it can be shown that the general method for calibrating an instrument utilizing selective detectors (8) (microphone type) is essentially the same as discussed herein.…”