Apollo 55000-394APO AlarmSense Optical Smoke Detector and Sounder Visual Indicator Base, The AlarmSense Optical Smoke Detector works using the light scatter principle. The detector changes to alarm state at a pre-set threshold of smoke penetration into the sensing chamber.

• · Works using the light scatter principle
• · Easy to install
• · Easy to extend
• · Responds well to slow-burning
• · smouldering fires
• · Well suited for bedrooms and escape routes
• · 360C visibility of LEDs
• · Reduces false alarms
• · Compliant with BS 5839