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Carbon Monoxide Alarm with Digital Display and 10 Year Warranty - Kidde K7DCO

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

£18.25 inc VAT

£15.21 ex VAT

£17.23 inc VAT

£14.36 ex VAT

£16.61 inc VAT

£13.84 ex VAT

Product Overview

The Kidde K7DCO carbon monoxide alarm features a 10 year life and a digital display for continuous monitoring of CO levels. Certified for use in homes, caravans and boats, this CO alarm protects you against the dangers of carbon monoxide gas in domestic and travel settings. Powered by two replaceable alkaline batteries, the K7DCO has a digital display screen to show current CO level, and a button which allows peak level recordings to be displayed. The K7DCO replaces its predecessor (7DCO) and can be fitted to existing 7DCO and 7CO baseplates.

  • Designed for the home and for travel (camping, caravanning and boats)
  • Product Life: 10 years
  • Battery: 2 x Duracell AA alkaline batteries included
  • Warranty: 10 year warranty
  • Free-standing or wall mounted (plate and fixings supplied)
  • CE Marked, UKCA Marked and fully certified for use on caravans and boats
  • Digital display provides several readings:
    • Current CO level
    • Peak CO level since last reset – 11ppm to 999ppm
    • Low battery warning (in addition to an audible "chirp")
    • End-of-life warning after 10 years
  • Kitemarked to BS EN 50291-1:2018 (domestic use) and BS EN 50291-2 (camping / caravans / boats)
  • Detector sounds a loud 85db warning alarm when CO is detected
  • Test/Reset button and digital display allows for easy testing and CO monitoring
  • End of life warning signal provides a reminder for alarm replacement
  • Dimensions (HxWxD): 72 x 119 x 39mm
  • This alarm is also suitable for the updated 2022 Welsh legislation

Please note: the packaging may state "excludes batteries" but this is regarding the warranty period; the K7DCO is supplied with suitable batteries.

Technical Data
Product Code KEK7DCO
Alternative Product Codes 7DCO, KE7DCO, K7DCO
Brand Kidde
Battery Type

2 x AA alkaline batteries

Dimensions (HxWxD)

72 x 119 x 39mm


Digital readout & LED status indicators

Operating Temperature

-10°C to 40°C

Relative Humidity

Up to 90% (non-condensing)

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 0.17kg
Product Datasheets
FAQs (4)
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.

Q. Can smoke alarms detect carbon monoxide gas?

No, normal smoke alarms cannot detect carbon monoxide (CO). Only combined smoke and CO alarms can detect both fire and carbon monoxide gas.

Key Product Features

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

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

Safety clips prevent installation without batteries

Backplate functions as wall mounting bracket for installation

What's Included?

Every Kidde KEK7DCO is supplied with the following components.

  • 1 x Kidde K7DCO carbon monoxide alarm
  • 2 x AA batteries
  • 1 x Screw fixing set (screws & rawl plugs)
  • 1 x Instruction manual

Pricing & Availability

Model Stock 1 unit 2+ units 5+ units
Product Code: KEK7DCO Stock Level:
More than 20 in stock Expected dispatch: 28th May
1 unit

£18.25 inc VAT

£15.21 ex VAT

2+ units

£17.23 inc VAT

£14.36 ex VAT

5+ units

£16.61 inc VAT

£13.84 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

21 customers have given this product an overall rating of 4.9 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: G S

It works

Published on: 22nd May 2024

Rating: 4 / 5 Stars

Reviewed by: A W

Bought as a replacement due to expiration date reached, had no issue with previous and hopefully the same with this one.

Published on: 16th April 2024

Rating: 5 / 5 Stars

Reviewed by: F E

Published on: 14th April 2024

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