Continuous Flow Infrared Gas Analyzer Employing Interference Filters
- 1 March 1956
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America
- Vol. 46 (3), 164-166
- https://doi.org/10.1364/josa.46.000164
Abstract
A filter photometer for the continuous determination of a single component of a gaseous mixture is described. The instrument incorporates a combination of band pass and long wavelength pass filters of the interference type, designed to transmit in the near infrared. The analyzer has been calibrated to determine hydrocarbons in automotive exhaust by means of absorbance measurements at 3.43 microns.Keywords
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