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

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1 unit 2+ units 5+ units

£21.59 inc VAT

£17.99 ex VAT

£20.99 inc VAT

£17.49 ex VAT

£20.63 inc VAT

£17.19 ex VAT

Product Overview

Replace your 10LLDCO with the new and improved K10LLDCO carbon monoxide alarm from Kidde. Powered by a sealed lithium battery that will power the alarm for its full 10 year lifespan without needing to be replaced, and for extra peace of mind the battery is covered by the 10 year manufacturer's warranty. The alarm combines a digital display for current and peak level CO readings with 3 distinct status LEDs to indicate alarm, normal operation, and fault. It has been updated from the previous 10LLDCO model to comply with the latest British Standards to ensure your home is protected. There is also a warning with plenty of notice at the end of its lifespan to indicate when it is due for replacement.

  • Ideal for large properties or homes with less mobile occupants
  • FREE economy delivery when ordering this product
  • Product Lifespan: 10 years
  • Battery: Sealed-in 10 year lithium battery
  • Warranty: 10 year manufacturer's warranty
  • Digital display shows current CO level between 11 and 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
  • Can be free standing or installed on a wall (fixings included)
  • 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 (5)
Q. What is carbon monoxide?

Carbon monoxide (chemical symbol: CO) is a colourless, odourless, tasteless and toxic gas created by the incomplete combustion of fossil fuels (gas, oil, coal and wood) used in our everyday appliances such as heaters, engines and boilers.

Protect yourself and your family by purchasing a CO detector and learning about the symptoms of carbon monoxide poisoning.

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. How can I protect my family from CO poisoning?

Make sure rooms and heaters are well ventilated, have your chimneys and flues checked regularly, make sure boilers and heaters are maintained and serviced regularly. Buy a carbon monoxide alarm/detector. A carbon monoxide alarm will measure the concentration of carbon monoxide in a room and sound an alarm if the CO concentration is higher than permitted

Q. Where should I install carbon monoxide detectors?

CO detectors should be installed near boilers and other potential sources of carbon monoxide.

Place the detector 1 to 3 meters away from the boiler, etc. to avoid small start-up CO discharges to cause false alarms.

It is advisable to install detectors in areas of your home that you spend the most time in such as the living room and bedrooms. Larger homes may require several detectors to cover the property fully.

Please note: we recommend referring to the manufacturer installation guide that came with your detector for full instructions.

Q. Which smoke, heat & CO alarms are suitable for the 2022 Scottish regulations?

From February 2022 all homes in Scotland must be fitted with interlinking smoke and heat alarms. In addition carbon monoxide alarms are required if there is a carbon-fuelled appliance or flue. View our list of alarms suitable for the Scottish regulations.

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 1 unit 2+ units 5+ units
Product Code: KEK10LLDCO Stock Level:
More than 20 in stock Expected dispatch: Today
1 unit

£21.59 inc VAT

£17.99 ex VAT

2+ units

£20.99 inc VAT

£17.49 ex VAT

5+ units

£20.63 inc VAT

£17.19 ex VAT

Delivery Options

The following delivery options are available on this product.

Free Economy Delivery

Free of Charge - Orders will be delivered in 3-5 working days with Evri by Hermes

Express Delivery

£8.10 inc VAT - Orders will be delivered in 1-2 working days with Evri by Hermes

Excellent Warranty

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

Looking for more information?

If you have any questions or would like more information about this product you can ask one of our specialists.

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