Ionic flame detector using plural electrodes

Details Ionic flame detector using plural electrodes Ionic flame detector using plural electrodes

1997-10-29

1999-09-14

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

431 75, 431 76, G08B 1712

Patent

active

059529300

ABSTRACT:
A pair of reference electrodes and a flame rod are placed in contact with charged particles in a flame produced by a burner. When a voltage is applied between the flame rod and the burner by a power source, a current (I.sub.fr) flows between them due to the flame conductivity. A potential difference (V.sub.12) between the pair of reference electrodes is detected by a potential difference detector. The dynamic flame impedance between the pair of reference electrodes is defined as the slope of the I.sub.fr -V.sub.12 relationship and is independent of I.sub.fr.

REFERENCES:
patent: 4245977 (1981-01-01), Morese
patent: 4710125 (1987-12-01), Nakamura et al.

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