Legrand 240 Volt Surface Mounted Photoelectric Interconnectable Smoke Detector With 9 Volt Battery Back Up
Photoelectric smoke alarms ‘see’ the smoke. They detect visible particles of combustion, eg smouldering cigarette smoke. They respond to a wide range of fires, but they are particularly responsive to smouldering fires and the dense smoke given off by foam filled furnishings or overheated PVC wiring. This is the technology recommended by fire authorities for residential applications.