Device for the non-dispersive optical determination of the conce

Details Device for the non-dispersive optical determination of the conce Device for the non-dispersive optical determination of the conce

1976-05-11

1978-11-21

Evans, F. L.

Optics: measuring and testing

For light transmission or absorption

By comparison

250373, 250573, 356 51, 356438, G01N 2126

Patent

active

041263960

ABSTRACT:
A method and apparatus for non-dispersive optical determination of gas and smoke components in a mixture by reflection and detection of radiation, of a different wavelength for each component, through the mixture, wherein the radiation is periodically intercepted before it enters the mixture and reflected direct to the photo-receiver and the measurement signals are divided by the stored direct signals.

REFERENCES:
patent: 3472594 (1969-10-01), Hughes et al.
patent: 3796887 (1974-03-01), Vincent et al.
patent: 3857641 (1974-12-01), Gass
patent: 3860818 (1975-01-01), Stalder et al.
patent: 3885162 (1975-05-01), Geertz

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