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Cavius Wireless Mains Smoke Alarm

The clever Cavius Wireless Mains Smoke Alarm allows you to install an optical alarm in the same position as your hanging light fitting.

  • £69.21
  • excluding VAT
  • (£83.05 inc. VAT)
Full price: £85.32, saving £16.11
  • 19% less
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Enabling you to combine both into one outlet, the optical smoke alarm includes connections for a pendant flex and a hole for the cable to hang through in order to fit your bulb and lampshade. Plus this includes wireless technology which enables this to connect and communicate with up to 32 other Cavius devices within your home. Then, when one is activated, all alarms will sound their 85-decibel siren to raise the alarm.

At just 97mm in diameter, it has a small and unobtrusive device and can be installed on the mounting base (supplied with screws and wall plugs), existing conduit box, and within a ceiling rose. Plus, the mains powered smoke alarm includes a replaceable lithium battery which acts as a back-up power supply in the event of a power failure to ensure you’re still connected. The alarm also features a 30-day low warning.

The optical smoke alarm is suitable for bedrooms and living rooms to detect smouldering fires and materials, aim to have at least one alarm on every floor, and avoid placing near a kitchen or shower room. Taking an optical reading of the environment every 8 seconds, it has a hush/test button for silencing alarms and checking its working condition, and an LED condition indicator too. 100% tested and approved to EN 14604:2005, its winner of the reddot design awards in 2016. 

The Wireless Mains Smoke Alarm can be used in conjunction with other wireless Cavius devices, including the battery smoke alarm, heat alarm, flood alarm, and smart remote.


  • 10-year warranty
  • Approved to EN 14604:2005., CE Marked
  • Built-in Ceiling rose option
  • Battery included plus hush button and test button
  • Diameter 97mm
  • Depth 52mm
  • Manufactured by Cavius