SMOKE ALARMS 240v, 9v, Ionisation, Photo Electric
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Ionisation smoke alarms 'feel' the smoke. They detect invisible particles of combustion, eg from cooking toast. They activate more quickly for fast, flaming fires with little visible smoke.
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.