The AlarmSense Optical Smoke Detector works using the light scatter principle. The detector also has the ability to monitor and discard transient sources of smoke. - Responds well to slow-burning, smouldering fires - Well suited for bedrooms and escape routes - 360°C visibility of LEDs - Quick and simple installation - Designed to operate in environments where transient levels of smoke may be expected - Reduces false alarms - 20 second delay