Patent ID: 7324004

Claim:
A method for reducing false detects, comprising: emitting an infrared light beam from a primary emitter through at least one of air and smoke to a primary monitor detector; detecting a first portion of the infrared light beam scattered byte at least one of the air and smoke with a primary receive detector; measuring a first voltage value associated with the first portion of the infrared light beam using the primary receive detector, setting a primary smoke alarm flag corresponding to a primary channel if the first voltage value is above a first threshold value; detecting a second portion of the infrared light beam scattered by the at least one of air and smoke with a secondary receive detector, the secondary receive detector being associated with a secondary emitter and a secondary monitor detector; measuring a second voltage value associated with the second portion of the infrared light beam using the secondary receive detector; setting a secondary smoke alarm flag corresponding to a secondary channel if the second voltage value is above a second threshold value; and setting an alarm indicating a smoke condition if the primary smoke alarm flag and the secondary smoke alarm flag are set.