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

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Product Overview

The K10LLDCO carbon monoxide alarm from Kidde is 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 the updated 2022 Scottish legislation for fire alarms in homes
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: 30ppm (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
FAQs (7)
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. Why is carbon monoxide dangerous?

Having no colour, smell or taste means that it is very hard to detect. Inhaling carbon monoxide reduces the blood's ability to carry oxygen, leaving the body's organs and cells starved of oxygen. Each year, over 50 people die in the UK as a direct result of exposure to Carbon Monoxide Gas (CO). Many more people die through strokes and respiratory illness made worse by inhaling low levels of CO over prolonged periods. More, still are left with permanent damage and invalidity.

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.

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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 by Hermes

Express Delivery

£8.10 inc VAT - Orders will be delivered in 3-5 working days 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.

Direct Telephone 01507 464182