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10 Year Sealed Longlife Battery Operated Carbon Monoxide Alarm - Kidde K10LLCO

5 out of 5 stars
1 unit 2+ units 5+ units

£21.60 inc VAT

£18.00 ex VAT

£20.40 inc VAT

£17.00 ex VAT

£18.28 inc VAT

£15.23 ex VAT

Product Overview

The Kidde K10LLCO carbon monoxide alarm features a 10 year sealed lithium battery designed to last for the life of the alarm, and is coupled with a 10 year manufacturer's warranty for peace of mind. Fully certified and Kitemarked to BS EN 50291-1, this alarm uses clear LED indicators to display Power (Green), Fault (Amber) and Alarm (Red) states. The combined test and hush button ensures easy testing and maintenance. The K10LLCO is supplied with its own baseplate, but can be installed on existing 10LLCO baseplates if replacing an older model.

  • For homes, and areas with a fuel burning appliance (gas, open fires etc.)
  • Product Life: 10 years
  • Battery: 10 year longlife battery (sealed lithium)
  • Warranty: 10 year warranty
  • Slim, lightweight design suitable for free-standing or wall mounting installations
  • Clear LED indicators to show the alarm status (Power / Fault / Alarm)
  • 50 ppm (parts per million) of CO gas will activate the alarm's loud 85dB sounder
  • Combined Test/Hush button for easy testing and maintenance
  • Clear end of life warning when the alarm needs replacing
  • Alarm memory feature - Red LED indicates a CO event has occurred
  • Kitemarked to BS EN 50291-1: 2018, CE marked (for domestic use) and UKCA approved
  • Dimensions (HxWxD): 72 x 119 x 39mm
  • This alarm is suitable for both the Welsh and Scottish updated 2022 legislation
  • Also suitable for new fuel-burning appliances as per Building Regulations Document J
Technical Data
Product Code KEK10LLCO
Alternative Product Codes K10LLCO, 10LLCO
Brand Kidde
Battery Type

10 Year Sealed Lithium

Dimensions (HxWxD)

72 x 119 x 39mm


LED Indicators

Operating Temperature

-10°C to +40°C

Relative Humidity

Up to 90% RH (non-condensing)


30ppm (parts per million) CO gas

Sound Output

85dB at 3 metres


10 Years

Weight 0.13kg
Product Datasheets
FAQs (4)
Q. What is the best way to dispose of an old smoke alarm or carbon monoxide detector?

Safelincs has signed up to Valpak's WEEE (Waste Electrical and Electronic Equipment) Distributor Take-Back Scheme*. This means if you are a Safelincs customer you can take old smoke, heat and CO alarms to your local recycling centre.

To find your nearest recycling centre, please visit Find out more about smoke alarm disposal.

*Registration ID: 7370

Q. Where should I install my carbon monoxide alarms?

CO detectors should be installed near potential sources of carbon monoxide, essentially any fuel-burning appliances such as boilers, cookers and ovens, fireplaces (both open and enclosed burners), and portable generators. As you are likely to be most affected by CO in areas of your home that you spend the most time in it is advisable to install alarms in those areas as well, such as the living room and bedrooms. It is also worth noting that while one detector is better than no detectors at all, larger homes may require several detectors to cover the property fully.

Also note that carbon monoxide has been proven to spread into neighbouring properties through open windows and, in semi-detached or terrace houses, through loft spaces. If your property has an attached garage with a connecting door through to the house, it is recommended to fit a CO alarm inside the house leading from that doorway.

Battery powered carbon monoxide alarms can typically be installed wall-mounted or left free-standing on flat, level surface.

  • Near an appliance: they should be placed within 1 to 3 metres horizontally from the appliance and between the height of the appliance to 150mm below the ceiling – i.e., not above a stove where it would be in the path of steam or fumes.
  • In living spaces: they should be positioned close to where the occupant's head is likely to be most of the time – e.g., on your bedside table.

Combined smoke & CO alarms or mains-powered CO alarms are typically installed on the ceiling and should be at least 30cm away from any wall, light fitting, or other obstruction.

Do not install CO alarms within 3 metres of doors or windows, above radiators, or immediately close to anything that gives off steam or fumes like a cooker or shower room. Similarly, it is not recommended to install detectors in dusty areas such as workshops or garages.

For more information, please check the manufacturer's instructions – you can download the PDF manual from the relevant product page on our site. You can also watch our video guide to positioning CO detectors.

Q. What are the symptoms of carbon monoxide poisoning?

The symptoms of CO poisoning can range from mild flu-like symptoms such as headache, drowsiness, confusion, nausea and dizziness to more severe symptoms like breathing difficulties and irregular heartbeat. CO poisoning can ultimately lead to coma and death.

View more symptoms on our carbon monoxide information page.

Q. Where are carbon monoxide alarms required?

Most legislation advises at least one carbon monoxide alarm is fitted near new or replacement fuel-burning appliances that are fixed installations, though rented properties (both social and private sector) often require CO alarms be provided by landlords even if no appliances are being installed or replaced. Examples include boilers, coal fires, wood burners, and gas ovens and cookers, though an exception is often made in legislation for gas appliances solely used for cooking.

However, any and all materials can give off CO when burning, including gas cookers. Carbon monoxide can also spread from neighbouring properties or outside sources such as vehicle fumes. Because of this, Safelincs strongly recommends the installation of carbon monoxide detectors in every home, and also at head-height in bedrooms to protect occupants while sleeping.

Landlords, please see our pages for English, Welsh, and Scottish alarms or our landlord guidance page for more information.

Key Product Features

Test your alarm at the press of a single button

LED indicators for alarm (red), power (green), fault (amber)

Features a 10 year sealed lithium battery, for peace of mind

Backplate funstions as wall mounting bracket for installation

What's Included?

Every Kidde KEK10LLCO is supplied with the following components.

  • 1 x Kidde K10LLCO carbon monoxide alarm
  • 1 x Sealed 10-year lithium battery
  • 1 x Screw fixing set (screws & rawl plugs)
  • 1 x Instruction manual

Pricing & Availability

Model Stock 1 unit 2+ units 5+ units
Product Code: KEK10LLCO Stock Level:
More than 20 in stock Expected dispatch: Today
1 unit

£21.60 inc VAT

£18.00 ex VAT

2+ units

£20.40 inc VAT

£17.00 ex VAT

5+ units

£18.28 inc VAT

£15.23 ex VAT

Delivery Options

The following delivery options are available on this product.

Standard Delivery

£3.19 inc VAT - Orders will be delivered in 2-3 working days with Evri

Next Working Day Delivery

£6.19 inc VAT - Orders will be delivered the next working day with Evri

For dispatch today order within

Excellent Warranty

This product is supplied with a 10 year manufacturers warranty as standard

Customer Reviews

5 customers have given this product an overall rating of 5 out of 5

Reviews by real customers

All of our product reviews are written by real customers that have purchased this product from us and are published without modification.

Rating: 5 / 5 Stars

Reviewed by: R G

Excellent product and service.

Published on: 21st May 2024

Rating: 5 / 5 Stars

Reviewed by: P G

Hopefully it will keep us alive

Published on: 15th March 2024

Rating: 5 / 5 Stars

Reviewed by: P W

Easy to install. Compliant with scottish regulations. Hopefully it won't be tested in anger!

Published on: 13th November 2023

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