Infrared flame sensor responsive to infrared radiation

Details Infrared flame sensor responsive to infrared radiation Infrared flame sensor responsive to infrared radiation

1991-08-29

1993-09-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Flame light source

2503381, G01J 3114

Patent

active

052451968

ABSTRACT:
An infrared flame sensor apparatus useful for detecting a flame in the combustion chamber of a water heater or boiler is disclosed. An infrared phototransistor with narrow light frequency response detects the infrared components emitted by the flame. A flame signal proportional to the amount of infrared radiation detected is generated. The flame signal is filtered to remove transients that may give a false or oscillatory signal indication. When the amplitude of the flame signal is in excess of a predetermined amplitude an indicator is illuminated or an alarm is activated.

REFERENCES:
patent: 3316409 (1967-04-01), Rockwell
patent: 3742474 (1973-06-01), Muller
patent: 4639717 (1987-01-01), De Meirsman

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