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SF340F Honeywell Carbon Monoxide Alarm

£85.54 (£71.28 exc. VAT)
In Stock
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New SF340F Honeywell Carbon Monoxide Alarm Honeywell SF340
£ 85.54 New

The SF340F Carbon Monoxide Alarm incorporates a unique module replacement system. There are no re-wiring or main unit replacement costs, just a simple, clip-in module to change once every five years. The SF340F is supplied with interconnect and relay output. This enables connection to control panels, shut-off valves, remote alarms etc, as well as allowing numbers of alarms to be linked together in a series.

  • Unique 5 year module replacement system
  • Up to 5 years battery back up
  • Low maintenance & low cost of ownership
  • Secure installation
  • 230Vac & 12/24Vdc options
  • Easy integration within existing systems
  • Interconnect and relay output options
  • Every alarm is tested and calibrated in carbon monoxide
  • No re-wiring or main unit replacement costs

Every unit in the SF340 series utilises the advanced ECO-Sure electrochemical cell sensing technology and comes complete with a full 10 year guarantee on the main unit and a full 5 year guarantee on each sensor module. Every unit in the SF340 series offers up to 5 years battery backup allowing for continuous protection – even in the event of power loss. This also allows the unit to be operational whilst waiting for permanent installation.

Orders that are placed before 12pm Mon-Thurs will be dispatched the same day, after 12pm will be dispatched the next working day. Any orders that are placed on a Friday after 12pm will not be dispatched until Monday (or Tuesday if Monday is a Bank Holiday).

UK & Ireland

ORDER VALUE 3-4 Working days* 2 Working days* 1 Working day*
Less than £75 £5 £7 £10
£75 and above Free £2 £5
*Working day means Monday to Friday and excludes seasonal and public holidays.


For International rates and a list of the countries we ship to please see our delivery page.

Standard delivery - most items

A parcel courier or Royal Mail will deliver your item/s between the hours 08.00 - 18.30 usually within 2-4 days after your item has been dispatched (unless you have selected an express delivery option).

Over sized items

A parcel courier or pallet delivery firm will deliver your item between the hours 08.00 - 18.30 usually 2-4 days after your item has been dispatched. All large item deliveries are 'kerb side' only which means the courier will not be able to take items into your delivery address. The receiver must arrange for larger items to be taken from the driver - heavy items will need 2 persons.


After checkout you will receive a tracking number, you can track your parcel anytime after 19.00 on this day. Please note - Delivery times to some areas of Scotland, the Scottish Highlands, Islands and outside the UK mainland, excluding Ireland can vary and items can take up to 4-5 working days to reach their destination after dispatch. Please click here to see delivery transit times. In the unlikely event that we are unable to deliver in the times stated above, we will either notify you by e-mail or telephone.

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