Advertising Disclosure Co2 Carbon Dioxide Detector Comparison - July 2025
5 Best Co2 Carbon Dioxide Detector In the UK
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. By purchasing the products we rank, you’ll get the lowest price we found while we may receive a commission at no cost to you, which will help us continue to provide you with value.
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| 1 Best Choice  9.9Exceptional | 2  9.8Exceptional | 3 Best Value  9.6Exceptional | 4  9.5Excellent | 5  9.4Excellent |
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ModelSwitchBot CO2 detector with Built-in Hygrometer, Temperature Humidity Monitor with carbon dioxide monitor, Bluetooth CO2 Monitor, 2-Year Data Storage, SwitchBot Hub Required for WiFi Function | Model INKBIRDPLUS Portable CO2 Detector, Air Quality Monitor with LCD Display, Rechargeable Battery, carbon dioxide Alarm for Home, Office, Travel Camping | Model Kidde 5CO Carbon Monoxide Alarm and Detector with AA Batteries - 10 Year Sensor Life CO Alarm for Home | Model FireAngel Carbon Monoxide Alarm and Detector - FA6813 10-Year Sensor Life CO Alarm for Home with AA Batteries - Travel, Portable Carbon Monoxide Detector - CO Detector Monitor with Test Button | Model Air Quality Monitor Indoor, 5 in 1 CO2 Monitor CO2 Detector Portable Air Quality Meter Carbon Dioxide Monitor with LCD Display, for Home Kitchen Office Car |
BrandSwitchBot | Brand INKBIRDPLUS | Brand Kidde | Brand Fireangel | Brand Ejoyous |
Reviews | Reviews | Reviews | Reviews  | Reviews - |
Tech Specs | ||||
item weight 227 g | item weight 140 g | item weight 115 g | item weight 141 g | item weight 165 g |
product dimensions 9.2 x 2.4 x 7.9 cm 226.8 g | product dimensions 7 x 7 x 2.5 cm 140 g | product dimensions 12.6 x 3.5 x 7.2 cm 115 g | product dimensions 5 x 12.3 x 8 cm 141 g | product dimensions - |
batteries included Yes | batteries included Yes | batteries included Yes | batteries included Yes | batteries included - |
power source Battery Powered | power source Battery Powered | power source Battery Powered | power source Battery Powered | power source - |
customer reviews4.3 4.3 out of 5 stars 219 ratings 4.3 out of 5 stars | customer reviews 5.0 5.0 out of 5 stars 17 ratings 5.0 out of 5 stars | customer reviews 4.7 4.7 out of 5 stars 28, 269 ratings 4.7 out of 5 stars | customer reviews 4.7 4.7 out of 5 stars 587 ratings 4.7 out of 5 stars | customer reviews - |
battery cell type Alkaline | battery cell type Lithium Polymer | battery cell type Alkaline | battery cell type Alkaline | battery cell type - |
batteries required Yes | batteries required Yes | batteries required Yes | batteries required Yes | batteries required - |
batteries 1 AAA batteries required. included | batteries 1 Lithium Polymer batteries required. included | batteries 2 AA batteries required. included | batteries - | batteries - |
included components Instruction Manual | included components - | included components Screws for wall mounting optional , Batteries | included components Carbon Monoxide Alarm, 2 x AA Batteries, Manual | included components - |
item package quantity 1 | item package quantity - | item package quantity 1 | item package quantity 1 | item package quantity - |
Available On | Available On | Available On | Available On | Available On |
Our Top 3 Picks
Here are the top 3 recommended products with more information to help you find the right product for you
9.9
1SwitchBotSwitchBot CO2 detector with Built-in Hygrometer, Temperature Humidity Monitor with carbon dioxide monitor, Bluetooth CO2 Monitor, 2-Year Data Storage, SwitchBot Hub Required for WiFi Function
Main highlights- Portable and Durable: Our air quality detector measures 3.6" x 3.1" x 0.9" and weighs just 0.34 lb. It has a built-in battery with up to 12 months of life and a low battery warnings. Features wall-mount holes and an adjustable bracket for versatile placement in any environment.
- Part of SwitchBot Ecosystem: With A SwitchBot Hub, exceeding CO2 levels can automatically activate your Battery Circuit Fan or Evaporative Humidifier for enhanced ventilation. Hubs also enable third-party voice control, simplifying air quality management.
- Multiple Alarm Methods: Customize CO2, temperature, and humidity range with trigger alerts. When limits are exceeded, you'll be notified via sound alarms, visual screen alerts, and app notifications (SwitchBot Hub required). Ensuring you can monitor air quality effectively at all times.
- High Precision Sensor: Featuring NDIR Swiss industrial-grade sensors, this device accurately monitors air quality by measuring CO2 levels every 1 second with an accuracy of ±50 ppm and a range of 400-9999 ppm. Its high sensitivity and stability ensure rapid and precise air quality feedback.
- 6-in-1 Multi-Functional Display Screen: SwitchBot Meter Pro CO2 features a large screen that simultaneously displays CO2 levels, temperature, humidity, time, date, comfort level, and weather forecasts (SwitchBot Hub 2 required). Making it easy to monitor your environment and decide when to ventilate for a healthier living space.
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9.8
2INKBIRDPLUS20% Off
INKBIRDPLUS Portable CO2 Detector, Air Quality Monitor with LCD Display, Rechargeable Battery, carbon dioxide Alarm for Home, Office, Travel Camping
Why we love it
High precision CO2 detection.
Portable with long battery life.
Easy-to-read LCD screen.
Main highlights- Wide Application: Suitable for homes, offices, grow tents, greenhouses, and warehouses. NOTE: Recommend that when first using, place the device in an open, unpopulated environment and manually calibrate it once to ensure accurate readings
- Portable and Durable: Compact and lightweight, this CO2 detector is easy to carry and comes with a lanyard for hanging. Its built-in 1000mAh lithium battery charges fully in 3 hours and lasts up to 72 hours, making it ideal for on-the-go use
- Large LCD Screen: The portable CO2 detector features a large color LCD screen for clear, easy-to-read displays. It automatically switches to ECO mode after 5 minutes of inactivity, saving energy without compromising performance
- High Precision Sensor: This CO2 detector features an advanced NDIR sensor, using infrared technology for precise CO2 measurement. It offers strong anti-interference and excellent stability, ensuring reliable readings in any environment
- Dual Alarm Function: The CO2 detector includes color-coded light indicators: green (400~699ppm), yellow (700~1499ppm), and red (1500~5000ppm). When CO2 levels exceed 1500ppm, an alarm sounds to alert you. Customize the alarm threshold for added convenience
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9.6
3Kidde24% Off
Kidde 5CO Carbon Monoxide Alarm and Detector with AA Batteries - 10 Year Sensor Life CO Alarm for Home
Why we love it
Portable and easy to install.
Long-lasting with a 10-year alarm life.
Comes with a 7-year warranty.
Main highlights- SAFETY APPROVED: CE and UKCA marked, and Kitemarked to the most up-to-date British Standards Institute (BSI) standard for carbon monoxide alarms (BS EN 50291-1:2018)
- LOUD & ACCURATE ALARM: From just 50ppm of CO in the air, the Kidde 5CO will emit a loud 85db piercing alarm alerting occupants to the presence of carbon monoxide
- LIGHTWEIGHT & COMPACT: The 5CO’s sleek design allows this life-saving device to blend into your décor, while remaining uncompromising on its strict quality testing
- FREE STANDING OR WALL MOUNTED: For ease of installation, the Kidde 5CO model can be placed free standing on any surface, or can be wall mounted with the included screws and wall plugs
- BATTERY POWERED: Each alarm comes equipped with 2x AA batteries included, allowing your alarm to be set up immediately upon receipt
- 7 YEAR WARRANTY: Enjoy peace of mind knowing your alarm is protected with an extensive seven year manufacturer’s warranty
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Value for money
TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
Value for money
TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
