Published: 24 October 2014
Category: Manufacturer News
Legrand has added two new smoke alarms to their range – Ionisation and Photoelectric. Ionisation and Photoelectric smoke alarms function in different ways, understanding how they function and where they are suitable is important for fire protection.
A Photoelectric smoke alarm is more effective at detecting smouldering fires, especially those that are started in areas away from the actual smoke alarm. The Photoelectric smoke alarm detects visible particles of combustion that make up smoke, e.g. smouldering cigarette smoke. It responds to a wide range of fires, but is particularly responsive to smouldering fires and the dense smoke given off by foam filled furnishings or overheated PVC wiring.
Ionisation smoke alarms are more effective at detecting flaming fires. Ionisation smoke alarms detect invisible particles of combustion, e.g. from cooking toast. They activate more quickly for fast, flaming fires with little visible smoke.
SPECIFICATIONS
- Photoelectric smoke alarm - detect smouldering fires and dense smoke, less prone to cooking nuisance alarms
- Ionisation smoke alarm – detect fast flaming fires with little visible smoke, less prone to false alarms caused by dust and steam
- Suitable for general use
- Interconnectable – up to 20 units
- Surface mounting for easy fit-off
- Power and alarm indicator
- Easy access for wiring
- Hush/Test button
- 9V battery back-up included
- Low battery indication (audio and visual)
- Duct cover to protect the device during installation
- Smoke detector interface (643086) available separately to interconnect with other appliances, circuits and systems e.g. lighting and exhaust
- Cat nos. 643085 (Photoelectric), 643084 (Ionisation)