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Optical smoke alarms are more responsive to smouldering fires producing large particles of smoke, typically produced from fires of furniture and bedding. They are suitable in bedrooms, hallways, landings and living rooms but not kitchens or in the hallway if close by to shower or bath rooms as false alarms could be a problem.

Rechargeable Lithium cell battery backup what is it?

When the mains supply is disconnected either from a fault or power cut, lithium cell (vanadium pentoxide) kicks in to ensure the alarm keeps monitoring for fires. The cell has a proven 10+ year life and will provide 6 months back up to the alarm without mains power. The cells within the new alarm are fully charged and are soldered for long term connection. They are also environmentally friendly with no special disposable requirements.

How does an optical smoke alarm work?

A light beam is pulsed within the sensor chamber every 10 seconds to look for smoke. Any smoke present has to be visible to the naked eye to allow the light receptor to see it. When a large particle is detected the light beam will be scattered onto the light receptor and an electrical signal will be sent activating the alarm.

• More responsive to slow smouldering fires 85db at 3m Kite marked to BSEN 14604:2005
• Fully conforming to BS5839 pt 6 grades D, E
• Fine mesh insect screen Red light indicator confirming an automatic test mode
• Test button & hush button for false alarm control 10+ year lithium tamper proof battery
• Easy fit design Comes complete with base and fixing screws
• Separate mains and warning LEDs
• Can be interconnected by 3 core cable or radio linked base FSRLB168
• Compatible with radio manual call point FSRCP407 and remote control switch FSRCS411 if radio link base is fitted to alarms 5 year guarantee

Mains linked alarms require a 230V supply, for example a light fitting. Firesafety.uk.com recommends fitting is completed by a qualified electrician. Mains linked alarms can be interconnected to a maximum of 12 units via a 3 core cable or by using the radio linked option (code FSRLB168) which also allows wireless connection to a manual call point (code FSRCP4070) and a remote control switch (code FSRCS411).

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