Flame sensing apparatus employing a detection electrode

Details Flame sensing apparatus employing a detection electrode Flame sensing apparatus employing a detection electrode

G - Physics

01

J

341/25, 340/155.

G01J 5/12 (2006.01) F23N 5/12 (2006.01) G08B 17/06 (2006.01)

Patent

CA 1076681

ABSTRACT OF THE DISCLOSURE A flame detecting apparatus in which a detecting electrode is disposed in a flame, the base of a transistor is connected to the detecting electrode and biased with a predetermined DC voltage derived from a biasing circuit, the biasing circuit including a resistor and the impedance of the flame, an AC signal is applied to the emitter of the transistor and an amplified AC signal is derived from the collector of the transistor as an output signal; the output signal being used as a control signal for a fuel supply control and/or an indicator.

253413

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