Gas detectors and gas analyzers utilizing spectral absorption

Details Gas detectors and gas analyzers utilizing spectral absorption Gas detectors and gas analyzers utilizing spectral absorption

1986-09-05

1988-05-24

Evans, F. L.

Optics: measuring and testing

For light transmission or absorption

Of fluent material

250343, 356 51, G01N 2135

Patent

active

047462183

ABSTRACT:
Instrumentation to detect the presence of, or to measure the concentration of, a gas or pollutant in a gaseous environment. With the use of gas filter correlation techniques and energy beams having suitable wavelengths, the presence and concentrations of these can be detected and measured, not only in flowing streams such as in exhaust stacks, but above a ground area and around its perimeter. A calibration means using a retrodirective reflector is also shown.

REFERENCES:
patent: 3287556 (1966-11-01), Good
patent: 3811776 (1974-05-01), Blau, Jr.
patent: 3878107 (1975-04-01), Pembrook et al.
patent: 4126396 (1978-11-01), Hartmann et al.
patent: 4632563 (1986-12-01), Lord, III
Snowman et al., Optical Spectra, Jun. 1972, pp. 30-33.

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