Optical Smoke Detectors

All optical smoke detectors have a second light source as redundancy. If one LED fails, the detector can detect smoke, keeping the same sensitivity A failure signal warns to replace the faulty detector. All loop devices have built-in isolators. If a short circuit or a wire breakage occurs, they sense the voltage drop or the line resistance change and the nearest isolators open, isolating the faulty loop segment. Not a single signal will be lost, as signals go from c [...]