Legrand 643085 Photoelectric Smoke Alarm, Detector, 240V with 9V Alkaline Battery Back Up, 85dB @ 3mtr, 147mm Dia x 49mm, Surface Mount, White

Legrand Photoelectric smoke alarms see the smoke. They detect visible particles of combustion, eg smoldering cigarette smoke. They respond to a wide range of fires, but they are particularly responsive to smoldering fires and the dense smoke given off by foam filled furnishings or overheated PVC wiring.

Features:
• Good for smoldering fire and dense smoke
• Not as prone to cooking nuisance alarms as ionisation alarms
• Contain no radioactive material
• Suitable for general use
• Interconnectable up to 20 units
• Surface mounting for easy fit-off
• Power and alarm indicator
• Easy access for wiring