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Ionisation Smoke Alarms

This section now contains our selection of replacement products designed to help customers easily find the most suitable optical alarm model to replace their ageing ionisation alarms.

Ionisation smoke alarms are now being phased out across the entire fire safety industry, from standalone domestic alarms to detectors in the largest commercial panel systems. This is because they use radioactive material in the sensor to detect the presence of smoke particles in the air, making them dangerous to manufacture, awkward and costly to transport, and an environmental hazard if disposed of incorrectly.

Ionisation smoke alarms were very effective for detecting fast-flaming fire. Historically, ionisation smoke detectors have been recommended for landings and office spaces, but the technology behind optical smoke alarms has now advanced to the point that they are interchangeable. Optical smoke alarms also are not deemed potentially hazardous like ionisation technology, due to not using radioactive elements.

Safelincs will soon stop selling ionisation smoke alarms, and we would encourage all of our customers to purchase optical smoke alarms instead.

Image of the Mains Powered Ionisation Smoke Alarm with Alkaline Back-up Battery - Aico Ei141

Mains Powered Ionisation Smoke Alarm with Alkaline Back-up Battery - Aico Ei141

  • Power: 230V mains powered with back-up battery
  • Backup Battery: 9V alkaline backup battery (included)
  • Warranty: 5 year warranty
  • Test and hush buttons
  • Replacement detector head kits available
  • Interlinks with up to 12 units
  • Suitable for BS 5839-6: 2019 Grade D2
  • Kitemarked to BS EN 14604:2005
  • Also suitable for the 2022 Scottish legislation
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4.8 out of 5 stars

£22.79 inc VAT

£18.99 ex VAT

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Image of the Mains Radio-Interlinked Ionisation Smoke Alarm with Alkaline Back-up Battery - Aico Ei141RF

Mains Radio-Interlinked Ionisation Smoke Alarm with Alkaline Back-up Battery - Aico Ei141RF

  • Power: 230V mains powered with back-up battery
  • Backup Battery: 9V alkaline backup battery (included)
  • Warranty: 5 year warranty
  • Test and hush buttons
  • Made in Ireland by Ei Electronics
  • Wirelessly interlinks with up to 12 compatible units
  • Suitable for BS 5839-6: 2019 Grade D2
  • Kitemarked BS EN 14604: 2005
  • Also suitable for the 2022 Scottish legislation
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5 out of 5 stars

£71.75 inc VAT

£59.79 ex VAT

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Image of the Replacement for Ei141 and Ei141RC Mains Powered Smoke Alarms

Replacement for Ei141 and Ei141RC Mains Powered Smoke Alarms

  • Power: 230V mains with back-up battery
  • Back-up Battery: Replaceable 9V alkaline battery
  • Warranty: 5 year warranty
  • Fits onto your existing Ei141 smoke alarm base
  • Fully compatible replacement for Ei141 smoke alarms
  • Upgrade to optical sensor technology for fewer false alarms
  • Kitemarked to BS EN 14604: 2005
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£29.99 inc VAT

£24.99 ex VAT

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Image of the Replacement for Kidde KF10 Mains Powered Smoke Alarms

Replacement for Kidde KF10 Mains Powered Smoke Alarms

  • Power: 230V mains with back-up battery
  • Back-up Battery: 9V alkaline back-up battery (included)
  • Warranty: 6 year warranty
  • Fully compatible replacement for Kidde KF10 ionisation smoke alarms
  • Fits onto your existing KF10 alarm base – no need for an electrician
  • Optical sensor technology with improved smoke detection
  • Kitemarked to BS EN 14604: 2005
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4 out of 5 stars

£23.99 inc VAT

£19.99 ex VAT

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Image of the Replacement for Ei151 Mains Powered Smoke Alarm

Replacement for Ei151 Mains Powered Smoke Alarm

  • Power: 230V mains with back-up battery
  • Back-up Battery: Self-charging lifetime battery
  • Warranty: 5 year warranty
  • Alarm test and silence button
  • Optical sensor technology for fewer false alarms
  • LED power and function indicators
  • Kitemarked to BS EN 14604: 2005
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4.8 out of 5 stars

From: £45.59 inc VAT

£37.99 ex VAT

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Image of the Replacement for Ei161, Ei161RC and Ei161e Mains Powered Smoke Alarms

Replacement for Ei161, Ei161RC and Ei161e Mains Powered Smoke Alarms

  • Power: 230V mains with back-up battery
  • Back-up Battery: Self-charging lifetime battery
  • Warranty: 5 year warranty
  • Fits onto your existing Ei161 smoke alarm base
  • Fully compatible replacement for Ei161 smoke alarms
  • Upgrade to optical sensor technology for fewer false alarms
  • Kitemarked to BS EN 14604: 2005
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4.9 out of 5 stars

£45.59 inc VAT

£37.99 ex VAT

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Ionisation Smoke Alarms

Ionisation Smoke Alarms

Some of the first smoke detectors produced, ionisation smoke alarms contain a weak radio-active source and react very quickly to fast flaming fires and any traces of smoke. While suitable for most rooms, historically ionisation smoke alarms have been recommended for installation on landings and in hallways. These alarms are not suitable for installation near kitchens or bathrooms as cooking fumes and steam can cause false alarms. For these locations it is recommended to install optical smoke detectors, which are less prone to false alarms.

Please note: Ionisation smoke alarms are now being phased out across the entire fire safety industry in favour of optical smoke alarms due to manufacturing, transportation, and disposal concerns around the radioactive material that ionisation smoke sensors rely on.

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