Flame sensor

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive

Patent

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Details

250340, G01J 100

Patent

active

041796063

ABSTRACT:
A flame sensor according to the invention enables automatic monitoring and/or control of the condition of combustion of a flame such as perfect combustion or imperfect combustion by detection of particular infra-red radiations emitted by the flame. The flame sensor includes a rotary disc having two sets of band-pass filters mounted thereon, a single photoelectric conversion device for measuring intensity of radiations having passed said band-pass filters and a division circuit for providing a ratio of an output of the photoelectric conversion device containing the wavelength of a resonant radiation of a carbon dioxide to an output of the photoelectric conversion device containing no such wavelength.

REFERENCES:
patent: 3026413 (1962-03-01), Taylor
patent: 3539807 (1970-11-01), Bickel
patent: 3903418 (1975-09-01), Horn

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