July 9, 2025

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Mijia Air Quality Co2s of 2025

Explore top picks

Best Choice

1

Temtop
Temtop Air Quality Monitor CO2 Detector Professional Carbon Dioxide PM2.5 PM10 Formaldehyde Temperature and Humidity Monitor w/Audio Alarm Data Export (M2000 2nd)
Main highlights

Comprehensive Air Pollution Monitoring
8-IN-1 multifunctional CO2 monitor with advanced sensors for CO2, HCHO, particles, temperature, and humidity. Provides extensive data export and easy calibration.

Versatile Indoor and Outdoor Use
Ergonomic design with colorful TFT display, rechargeable battery, and portability. Ideal for home, office, lab, and travel.

Convenient Data Collection
Highly praised for USB downloadable history files and the ability to set data collection intervals. Convenient for tracking air quality over time.
9.8

Exceptional

Our Rating

9.3
clearly written

8.9
User interface

8.7
Simple to use
How do we rank?

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Careful review Our team ensures quality, value, and fit based on real user feedback

Trusted insights AI and human analysis guide your decisions, reflecting real user priorities
Real users impact

Thousands of users trust our site daily

Based on millions of stores and reviews

Shoppers influence our rankings
Analyzing top stores
Value for Money

2

qingping

Qingping Air Quality Monitor Gen 2, Air Quality Monitor Indoor Detects PM2.5, CO2, PM10, Noise, Temperature and Humidity, New Upgraded Alarm Clock Function, Air Quality Tester for Bedroom, Smart Home
9.7

Exceptional

Our Rating
3

Nanezan

12 in 1 Air Quality Monitor Indoor- Portable Indoor Air Quality Meter for CO2, TVOC, PM2.5, PM1.0, PM10, Temperature, Humidity & Time Display, Air Quality Tester for Home 【Dual Chip & High Accuracy】
9.6

Exceptional

Our Rating
4

YNAK

16 in 1 Air Quality Monitor Indoor 7" Display 9 AQI+7 AQI Alerts Air Quality Meter for CO2, TVOC, PM2.5 PM1.0 PM10, HCHO, Temperature Humidity AQI & Time, Air Detector Air Quality Tester for Home
9.4

Excellent

Our Rating
5

EG
CO2 Carbon Dioxide Air Quality Monitor, Pollution & Ventilation Meter, Tester; Detect & Test Indoor Air Ventilation Levels with CO2 PPM Levels, Temperature and Humidity Sensor Readings on LED Screen
Main highlights

Key Features and Benefits
Highly readable LED display for CO2, temperature, and humidity readings. Offers safety by monitoring air quality and supports healthy indoor spaces.

Ideal Use Cases
Perfect for monitoring public/private spaces with high occupancy to ensure ventilation is sufficient to reduce viral transmission risk and maintain healthy CO2 levels.

Customer Reviews Highlight
Most praised for its accuracy and clear display, users appreciate the peace of mind and ease of use in maintaining indoor air quality.
Key specs
- color:White
- power source:1 Lithium Polymer battery
- humidity:Yes
- sensor:CO2, Temp, Humidity
- battery:Lithium Polymer included
9.3

Excellent

Our Rating

8.4
clearly written

8.2
Simple to use

8.0
User interface
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6

Temtop

Temtop CO2 Monitor Indoor Air Quality Monitor with BLE App Connectivity, Portable CO2 Meter, CO2, Temperature, Humidity for Home, Office, or School
9.2

Excellent

Our Rating
7

Gain Express
CO2 Meter Air Quality Monitor Handheld CO2 Monitor 0~9999ppm Measurement Carbon Dioxide Temperature Humidity Detector NDIR Sensor Indoor Outdoor Air Quality Tester
Main highlights

High Accuracy and Extensive Range
Features 0-9999ppm CO2 range, temperature, humidity, dew point, and wet bulb measurements with high accuracy and portable design.

Ideal for Public Spaces
Perfect for IAQ monitoring in offices, classrooms, factories, hospitals, and hotels to ensure optimal air quality and ventilation.

Customer Praise
Most reviews highlight the reliable NDIR CO2 sensor and the convenience of dual power options as the standout features.
9.1

Excellent

Our Rating

9.3
Precision

9.1
clearly written

8.7
Simple to use
8

Inkbird

INKBIRD Smart 3-in-1 CO2 Monitor with Bluetooth | Air Quality Monitor Detects CO2, Temperature, Humidity | Indoor CO2 Detector with Dual Alarm for Home, Office, Grow Tent, Travel etc.
9.0

Excellent

Our Rating
9

AirKnight Monitoring
AirKnight Premium Indoor Air Quality Monitor Indoor & Air Quality Sensor. VOC detector, CO2 Monitor, Formaldehyde Detector HCHO, AQI, PM2.5, PM10 Temperature Humidity Air Monitor AQI CO2 Meter Gas Off
Main highlights

Real-Time Air Quality Monitoring
The AirKnight 9-in-1 monitor detects CO2, PM2.5, PM10, TVOCs, and HCHO in real-time on an easy-to-read LCD screen.

Portable and Versatile Use
Equipped with a 3000 mAh rechargeable battery, it's perfect for home, work, school, or car use.

Highly Praised User-Friendly Design
Customers appreciate the intuitive design and comprehensive instructional support included with the AirKnight monitor.
Key specs
- CO2 Levels:Detected in real-time
- TVOC:Volatile organic compounds
- Temperature:N/A
- HCHO:Formaldehyde detected
- PM2.5:Particulate matter detected
8.9

Very Good

Our Rating
10

SwitchBot
Air Quality Monitor Indoor 5-in-1 Meter Pro CO2 Detector, CO2 Alarm, CO2 Monitor with APP, Large Display, Bluetooth Air Quality Tester for Home, Office, 2-Year Data Storage (Meter Pro CO2)
Main highlights

5-in-1 Display Convenience
Features a large screen showing CO2, temperature, humidity, time, and comfort level for easy monitoring.

Versatile Usage Scenarios
Perfect for homes, offices, gyms, classrooms, and greenhouses, ensuring optimal air quality everywhere.

High Precision Sensor
Praised for its Swiss-made NDIR sensors providing accurate CO2 readings and fast feedback.
Key specs
- CO2 Levels:400-9000 ppm
- TVOC:N/A
- Temperature:Displayed on screen
- HCHO:N/A
- PM2.5:N/A
8.8

Very Good

Our Rating

Mijia Air Quality Co2s of 2025

1

Temtop Air Quality Monitor CO2 Detector Professional Carbon Dioxide PM2.5 PM10 Formaldehyde Temperature and Humidity Monitor w/Audio Alarm Data Export (M2000 2nd)

9.3

8.9

8.7

How do we rank?

How do we rank?

Analyzing top stores

2

Qingping Air Quality Monitor Gen 2, Air Quality Monitor Indoor Detects PM2.5, CO2, PM10, Noise, Temperature and Humidity, New Upgraded Alarm Clock Function, Air Quality Tester for Bedroom, Smart Home

3

12 in 1 Air Quality Monitor Indoor- Portable Indoor Air Quality Meter for CO2, TVOC, PM2.5, PM1.0, PM10, Temperature, Humidity & Time Display, Air Quality Tester for Home 【Dual Chip & High Accuracy】

4

16 in 1 Air Quality Monitor Indoor 7" Display 9 AQI+7 AQI Alerts Air Quality Meter for CO2, TVOC, PM2.5 PM1.0 PM10, HCHO, Temperature Humidity AQI & Time, Air Detector Air Quality Tester for Home

5

CO2 Carbon Dioxide Air Quality Monitor, Pollution & Ventilation Meter, Tester; Detect & Test Indoor Air Ventilation Levels with CO2 PPM Levels, Temperature and Humidity Sensor Readings on LED Screen

8.4

8.2

8.0

6

Temtop CO2 Monitor Indoor Air Quality Monitor with BLE App Connectivity, Portable CO2 Meter, CO2, Temperature, Humidity for Home, Office, or School

7

CO2 Meter Air Quality Monitor Handheld CO2 Monitor 0~9999ppm Measurement Carbon Dioxide Temperature Humidity Detector NDIR Sensor Indoor Outdoor Air Quality Tester

9.3

9.1

8.7

8

INKBIRD Smart 3-in-1 CO2 Monitor with Bluetooth | Air Quality Monitor Detects CO2, Temperature, Humidity | Indoor CO2 Detector with Dual Alarm for Home, Office, Grow Tent, Travel etc.

9

AirKnight Premium Indoor Air Quality Monitor Indoor & Air Quality Sensor. VOC detector, CO2 Monitor, Formaldehyde Detector HCHO, AQI, PM2.5, PM10 Temperature Humidity Air Monitor AQI CO2 Meter Gas Off

10

Air Quality Monitor Indoor 5-in-1 Meter Pro CO2 Detector, CO2 Alarm, CO2 Monitor with APP, Large Display, Bluetooth Air Quality Tester for Home, Office, 2-Year Data Storage (Meter Pro CO2)

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