10 Year Life Carbon Monoxide Alarm with Digital Display - Kidde K5DCO
The Kidde K5DCO is a 10 year digital display carbon monoxide alarm which will alert you to dangerous levels of carbon monoxide gas in your home. Powered by two replaceable alkaline batteries, the K5DCO features a digital display screen to show the current CO level, and a button which allows peak level recordings to be displayed. This alarm boasts a 7 year warranty, and can be wall mounted or free standing. The K5DCO replaces its predecessor (5DCO) and can be fitted to existing 5DCO and 5CO baseplates.
- For rooms where an open fire or gas appliance is present
- Product Life: 10 years
- Battery: 2 x Duracell AA batteries included
- Warranty: 7 year warranty
- Suitable for wall mounting or free-standing installations (plate and fixings supplied)
- Clear LED indicators: Green - Power, Amber - Fault, Red - Alarm
- Combined Test / Reset button for regular testing of the alarm function
- Loud 85dB sounder activates when CO is detected (alarms from 50ppm)
- Digital screen shows current level of CO (from 30ppm) with dedicated button to display peak levels
- Audible and visual warning for low battery and end of life
- Ideal replacement for original Kidde 5DCO or 5CO alarms reaching end of life
- Kitemarked to BS EN 50291-1: 2018 (for domestic use) with CE and UKCA approval
- Dimensions (HxWxD): 73 x 127 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 K5DCO is supplied with the recommended batteries.
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)
2 x AA alkaline batteries power the alarm for at least 1 year
Safety clips prevent installation without batteries
What's Included
The KE5DCO CO alarm is supplied with the following components.
- 1 x Kidde K5DCO carbon monoxide alarm
- 2 x AA batteries
- 1 x Screw fixing set (screws & rawl plugs)
- 1 x Instruction manual
Customer Reviews (232)
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.
Reviewed by
I C
Published on
27th March 2026
Reviewed by
R C
Published on
24th January 2026
Does what it says on the tin and at a reasonable price
Reviewed by
R C
Published on
24th January 2026
Does what it says on the tin and at a reasonable price
Reviewed by
W A
Published on
21st December 2025
Very happy with the product & service.
Well designed & made product.
Reviewed by
E D
Published on
28th August 2025
Easy to set up
Technical Data
| Product Code | KEK5DCO |
|---|---|
| Brand | Kidde |
| Battery Chemistry | Lithium |
| Battery Type | AA Batteries |
| CO Alarm Level (parts per million) | From 50ppm |
| CO Detection Level (parts per million) | From 30ppm |
| Connection | Standalone |
| Colour | White |
| Approvals & Markings | CE Marked |
| UKCA Marked | |
| Compliance | BS EN 50291-1 (Domestic) |
| 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 | Welsh Legislation (2022) |
| Material | Plastic |
| Operating Temperature | -10°C To +40°C |
| Power Type | Battery Powered |
| Recyclable | Yes - Valpak's WEEE Distributor Take-back Scheme |
| Relative Humidity | 10% To 95% |
| Sensitivity | 30ppm (Parts per Million) |
| Sensor Type | Electro-chemical |
| Sound Level | 85dB |
| Warning Type | Audible - Alarm Sounder |
| Warranty | 7 Years |
| Dimensions (Unit) |
|
| Weight | 168g |
| Datasheets |
Battery Heat Alarm - UltraFire UBH1
From: £11.39 inc VAT
£9.49 ex VAT
Battery Optical Smoke Alarm - UltraFire UBS1
Battery Optical Smoke Alarm - Kidde 29HD
Replacement for FireAngel ST-620 10 Year Smoke Alarm - Firehawk FHB10
£15.48 inc VAT
£12.90 ex VAT
Radio-Interlinked 10 Year Sealed Battery Heat Alarm - UltraFire ULLH10RF
From: £27.60 inc VAT
£23.00 ex VAT
Mains-Powered Carbon Dioxide (CO2) Air Quality Monitor with "Traffic Light" & Voice Alerts - Kidde KCO2M10
£93.59 inc VAT
£77.99 ex VAT
Battery Optical Smoke Alarm - UltraFire UBS1 Twin Pack
Combination Carbon Monoxide and Smoke Alarm 10 Yr Warranty - Kidde K10SCO
From: £20.10 inc VAT
£16.75 ex VAT
Magnetic Mounting Kit for Smoke, Heat, and Carbon Monoxide Alarms
From: £3.79 inc VAT
£3.16 ex VAT
Replacement for FireAngel SI-610 10 Year Smoke Alarm - Firehawk FHB10
£15.48 inc VAT
£12.90 ex VAT
10 Year Longlife Battery Optical Smoke Alarm Twin Pack - Kidde 10Y29
£28.80 inc VAT
£24.00 ex VAT
Our original carbon monoxide detector stopped working. As I am elderly I wanted a replacement that was exactly the same dimensions as the old one. This fitted over the original back panel so saved me having to ask someone to put up one which had different dimensions & needed another back panel fitted.