When detection speed matters, there is nothing faster than Kidde's Dual Band Optical Detector. Capable of detecting and reacting to a flame in less than a second, the Kidde Optical Sensor is the perfect match for sudden fire threats like turbochargers and fuel rails. Using our patented dual band technology, this ensures that false detections are a relic of the past. Two electronic eyes recognize different elements of a flame and the detector must see the threat in both eyes before initiating the suppression system. This allows the detector to determine if there is a fire or simply a hot surface, preventing an errant discharge.