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

Kek10Lldco Kidde K10Lldco Carbon Monoxide Digital Alarm front display showing buttons and digital readout at zero
4.8 out of 5 stars

20+ In Stock

For dispatch today order within
4 Hrs 58 Mins
£24.00 inc VAT

£21.50 inc VAT

£17.92 ex VAT

Standard Delivery

Will usually be delivered in 2-3 working days

£4.20 inc VAT

Next Day Delivery

Will usually be delivered the next working day

£7.00 inc VAT

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
  • Compliant with Scottish 2022, Welsh Landlord 2022, and Northern Ireland Landlord 2024 legislation

Key Product Features

KEK10LLDCO - Kidde Digital 10 Year 10 Year Carbon Monoxide Alarm Closeup Button

Combined Test & Reset button, plus Peak Level feature

KEK10LLDCO - Kidde Digital 10 Year 10 Year Carbon Monoxide Alarm Closeup Indicators

LED indicators show power and alarm status

KEK10LLDCO - Kidde Digital 10 Year 10 Year Carbon Monoxide Alarm Closeup Sounder

Loud 85dB alarm alerts occupants to the presence of deadly gas

KEK10LLDCO - Kidde Digital 10 Year 10 Year Carbon Monoxide Alarm Contents

Includes screws and plugs suitable for wall mounting

What's Included?

The KE10LLDCO CO alarm is supplied with the following components.

  • 1 x Kidde K10LLDCO carbon monoxide alarm
  • 1 x Wall mounting backplate
  • 1 x Screw set (screws & rawl plugs)
  • 1 x Instruction manual
KE10LLDCO Dimensions
Customer Reviews

Customer Reviews (155)

4.8 out of 5 stars

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

Reviewed by

J P

Published on

5th May 2026

This littel alarm is good value and easy to fit. I've placed it fairly close to our gas boiler and the reading has been consistently zero. Hopefully that's good and gopefully it will never read anything else.

Rating: 5 / 5

Reviewed by

C G

Published on

23rd January 2026

Clear instructions, easy to fit, digital display very reassuring.

Rating: 5 / 5

Reviewed by

S M

Published on

6th December 2025

Speedy delivery. Easy set up.

Rating: 5 / 5

Reviewed by

Y S

Published on

29th November 2025

Good quality

Looks well made and was a decent price. Hopefully its doing its job well.

Rating: 5 / 5

Reviewed by

E W

Published on

11th November 2025

Great product

FAQs

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Technical Data

Technical Data

Product Code KEK10LLDCO
Brand Kidde
Approvals & Markings CE Marked
UKCA Marked
Battery Type Sealed Lithium
CO Alarm Level (parts per million) From 50ppm
CO Detection Level (parts per million) From 30ppm
Colour White
Compliance BS EN 50291-1 (Domestic)
Connection Standalone
Display Digital Display
LED Indicators
Environmental Suitability Home
Fixing Options Freestanding
Wall Mounted (Fixings Included)
Installation Position Mount At Head Height
Lifespan 10 Years
Local Legislation Northern Ireland Legislation (2024)
Scottish Legislation (2022)
Welsh Legislation (2022)
Material Plastic
Operating Temperature 0°C To +40°C
Power Type Battery Powered
Recyclable Yes - Valpak's WEEE Distributor Take-back Scheme
Relative Humidity 0% To 90%
Sensitivity 30ppm (Parts per Million)
Sensor Type Electro-chemical
Sound Level 85dB
Warning Type Audible - Alarm Sounder
Warranty 10 Years
Dimensions (Unit)
  • Height: 72mm
  • Width: 119mm
  • Depth: 39mm
Weight 138g
Datasheets