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10 Year Longlife Battery Carbon Monoxide Alarm with Digital Display - Kidde K10LLDCO

4.8 out of 5 stars
Save 7%
£22.00 inc VAT
£18.33 ex VAT
Product Overview

The Kidde K10LLDCO 10 year digital display carbon monoxide alarm is powered a sealed longlife (lithium) battery that will power the alarm for its full 10 year lifespan; coupled with a 10 year manufacturer's warranty for peace of mind. When dangerous levels of carbon monoxide gas have been detected, the K10LLDCO will sound a loud 85dB warning alarm. The digital display shows current CO levels (from 30ppm) and peak CO levels (from 11ppm) when the peak level button is pressed. The K10LLDCO can be left free standing, or wall mounted, and is compatible with the original 10LLCO and 10LLDCO baseplate (if replacing an older model).

  • For homes, and rooms with fuel burning appliances (e.g. boiler, open fireplace)
  • Product Life: 10 years
  • Battery: 10 year longlife battery (sealed lithium)
  • Warranty: 10 year manufacturer's warranty
  • Can be free standing or installed on a wall (fixings included)
  • Digital display shows current (from 30ppm) and peak CO levels (from 11ppm) to 999ppm (parts per million)
  • Separate coloured LEDs clearly indicate alarm status at a glance:
    • Green: normal operation and power (flashing)
    • Amber: fault or low battery / end of life (refer to manual)
    • Red: alarm (with siren) and memory feature (flashing once per minute)
  • 10 years of continuous monitoring for dangerous levels of carbon monoxide
  • Peak level display and alarm memory feature let you know about high CO levels while not at home
  • End of life warning when the alarm needs replacing
  • Combined test and reset button for easy testing and maintenance
  • Kitemarked to BS EN 50291-1: 2018 (domestic use) with CE and UKCA approvals
  • This alarm is also suitable for both the Welsh and Scottish updated 2022 legislation
Technical Data
Product Code KEK10LLDCO
Alternative Product Codes K10LLDCO, 10LLDCO
Brand Kidde
Battery Type

10 Year Sealed Lithium

Dimensions (HxWxD)

72 x 119 x 39mm


Digital Display & LED Indicators

Operating Temperature

0°C to 40°C

Relative Humidity

Up to 90% RH (non-condensing)


Display: 11ppm (parts per million) CO gas

Alarm: 50ppm (parts per million) CO gas

Sensor Type


Sound Output

85dB (A) at 3 metres

Storage Humidity

5% to 95% RH (non-condensing)

Storage Temperature

-20°C to 60°C


10 years

Weight 0.14kg
Product Datasheets
FAQs (3)
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

Digital display shows current CO level between 11 and 999ppm

See the peak CO level recorded at the press of a single button

Features a sealed-in 10 year lithium battery for peace of mind

Backplate functions as wall mounting bracket for installation

What's Included?

Every Kidde KEK10LLDCO is supplied with the following components.

  • 1 x Kidde K10LLDCO CO alarm
  • 1 x Sealed-in 10 year lithium battery
  • 1 x Screw fixing set (screws & rawl plugs)
  • 1 x Instruction manual

Pricing & Availability

Model Stock Price
Product Code: KEK10LLDCO Stock Level:
More than 20 in stock Expected dispatch: 28th May

£22.00 inc VAT

£18.33 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

15 customers have given this product an overall rating of 4.8 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: a k

Quality product.easy instructions

Published on: 28th April 2024

Rating: 5 / 5 Stars

Reviewed by: I H

Good choice, prompt delivery, fair price.

Published on: 19th September 2023

Rating: 4 / 5 Stars

Reviewed by: D C

It appears to be happy - which in turn makes me happy. Other than not staring on the side of the cabinet I twice fixed it to with Gorilla mount, it's ok. It's now not in its ideal position (according to the user guide) but it's hopefully wrongly positioned right enough to let me know if there's an issue so we won't all die in our beds

Published on: 12th September 2023

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