Advertising Disclosure Co2 Monitor Carbon Dioxide Comparison - September 2025
3 Best Co2 Monitor Carbon Dioxide 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 Best Value  9.8Exceptional | 3  9.7Exceptional |
| View DealOn Amazon | View DealOn Amazon | View DealOn Amazon |
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 Brandson - CO2 Detector, Co2 Monitor Carbon Dioxide Detector Alarm, Co2 Sensor Digital USB, Indoor Air Quality Sensor Monitor with Temperature Humidity for Home Office Gym Car |
BrandSwitchBot | Brand INKBIRDPLUS | Brand Brandson |
Reviews | Reviews | Reviews |
Tech Specs | ||
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 8 x 2 x 8 cm 100 g |
batteries 1 AAA batteries required. included | batteries 1 Lithium Polymer batteries required. included | batteries 1 Lithium Ion batteries required. included |
item weight 227 g | item weight 140 g | item weight 100 g |
batteries included Yes | batteries included Yes | batteries included Yes |
power source Battery Powered | power source Battery Powered | power source Battery Powered |
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 4.2 4.2 out of 5 stars 11 ratings 4.2 out of 5 stars |
battery cell type Alkaline | battery cell type Lithium Polymer | battery cell type Lithium Ion |
batteries required Yes | batteries required Yes | batteries required Yes |
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
1SwitchBot18% OffSwitchBot 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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9.7
3Brandson
Brandson - CO2 Detector, Co2 Monitor Carbon Dioxide Detector Alarm, Co2 Sensor Digital USB, Indoor Air Quality Sensor Monitor with Temperature Humidity for Home Office Gym Car
Why we love it
Portable and easy to carry.
Customizable CO2 alarm settings.
Clear, easy-to-read display.
Main highlights- WITH PRACTICAL ALARM FUNCTION: You are warned when the CO2 content reaches a critical value (default: 1000 PPM). The limit value can be set individually | Classification of the display: up to 600 PPM: very good air quality | 601 - 1000 PPM: good to moderate | 1001 - 1500 PPM: moderate to poor | over 1500 PPM: very poor - urgently supply of fresh air!
- TECHNICAL DATA: Measuring ranges: CO2: 400 - 5000 PPM, deviations +- (50ppm + 5%); Temperature: -9.9°C to + 50°C; Humidity: 0% - 95%; +-6% | DIMENSIONS: 82 x 82 mm, depth 26 mm | Screen size: 8.5 cm / 3.34 inches | WEIGHT: 108 g | SCOPE OF DELIVERY: Brandson carbon dioxide meter with rechargeable battery, USB to 3.5mm DC hollow plug cable and user manual.
- SCOPE OF FUNCTIONS: CO2 meter with alarm function | Limit values can be set individually | Touch LCD display with 4 brightness levels| 4-stage round display | Alarm clock with snooze function | Display of temperature (C and F), time (12 / 24 h) and humidity | Display of battery level, feel-good symbols (smileys), ventilation recommendation, Co2 warning and CO2 alarm | Buttons: On/OFF switch, +/- rocker switch, Settings button
- POWER SUPPLY: Hollow plug power connector for charging and mains operation | integrated Li-Ion battery 500 mAh | incl. USB to DC hollow plug cable for battery charging and power connection.
- Healthy INDOOR AIR AT ALL TIMES! Keep control of the air quality with the Brandson CO2 meter! At home as in the office. Perfect for preventing headaches, fatigue and lack of concentration. Small and compact with battery operation, can be taken and used anywhere. Good display visibility from all sides. Incl. alarm function and display of temperature and humidity. | 306118
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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.
