Optical flame sensor having opaque hollow tube

Details Optical flame sensor having opaque hollow tube Optical flame sensor having opaque hollow tube

1998-12-23

2000-10-03

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

340577, 3402282, 340507, 340511, 340508, G08B 1712

Patent

active

061279323

ABSTRACT:
A flame sensor for sensing flame produced by the burner of a furnace. The sensor includes a closed end tube having a photosensitive element located therein. The photosensitive element is sealed off from any external light so as to only respond to infrared wavelengths of light emitted from the end of the tube when subjected to a flame produced by the burner of the furnace.

REFERENCES:
patent: 3813551 (1974-05-01), Broadbent et al.
patent: 4322723 (1982-03-01), Chase
patent: 4750142 (1988-06-01), Akiba et al.
patent: 4855718 (1989-08-01), Cholin et al.
patent: 5077550 (1991-12-01), Cormier
patent: 5245196 (1993-09-01), Cabalfin
patent: 5448676 (1995-09-01), White et al.

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