Title: Fluorescent gas analyzer

Abstract: A fluorescent gas analyzer to detect the concentration of a trace gas in another gas or a mixture of gases. The invention is particularly adapted to measure pollutant gases in the air, and still more particularly to measure SO.sub.2 in air, stack gases, and the like. The invention includes a removable and heated sample cell. The analytical determinations are made digitally by direct photon counting. The digital logic which handles the data produced by the cell includes means for continuous adjustment to accommodate changes in source energy and means to correct for dark current.

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Inventors: Wolfe, Court Lone (Pittsburgh, PA, US)
Krutz, Ronald Louis (N. Huntingdon, PA, US)

Application Number: 690595
Filing Date: 1976-05-27
Publication_date: 1977-08-30
Assignee: W. R. Grace & Co. (New York, NY)
Primary Class(es): 250/461.1
Other Classes:
US Patent Ref:

3795812	Mar, 1974	Okabe	250/373.
3826920	Jul, 1974	Woodroffe et al.	250/373.
3845309	Oct, 1974	Helm et al.	250/373.

Other Refs:
Primary Examiner: Willis, Davis L.
Assistant Examiner:
Attorney: Kovensky; William, Prince; Kenneth E.