10 Best co2 meters of 2025

Explore top picks

Best Choice

1

SAF
SAF Aranet4 Home: Wireless Indoor Air Quality Monitor for Office or School (CO2, Temperature, Humidity and More) Portable, Battery Powered, E-Ink Screen, App for Configuration & Data History
Main highlights

Real-Time Monitoring
Measures CO2, temperature, humidity, and pressure for healthy ventilation.

Portable Use
Ideal for home, travel, and workplace to monitor air quality.

User-Friendly Display
Color-coded e-ink display and app praised for ease of use.
9.9

Exceptional

Our Rating

9.7
Battery Duration

9.7
clearly written

9.5
Precision
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Value for Money

2

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.
9.8

Exceptional

Our Rating

9.3
Precision

9.1
clearly written

8.7
Simple to use
3

Temtop

Temtop CO2 Monitor Indoor air Quality Monitor Portable CO2 Meter, CO2, Temperature, Humidity Home, Office or School
9.7

Exceptional

Our Rating
4

Newentor
Newentor CO2 Monitor, Indoor Air Quality Meters, Carbon Dioxide Detector with Voice Alert, Large Display CO2 Tester, Temperature Humidity Sensor, Alarm Clock for Home, RV, Grow Tents, Black
Main highlights

High-Precision CO2 Sensor
Features Swiss Sensirions PASens technology for accurate CO2 measurements across various environments.

Versatile Application Scenarios
Ideal for homes, RVs, grow tents, and more, ensuring safe CO2 levels.

User-Friendly Display and Alerts
Bright, colorful display with customizable CO2 alerts praised by customers.
9.6

Exceptional

Our Rating

9.3
clearly written

8.0
User interface

8.0
Precision
5

MASHI

MASHI Air Quality Monitor, Indoor Air Quality Meter Detects CO2, TVOC, Formaldehyde, Humidity, Temperature Multifunctional air Pollution Detector for Home, Office or School, Air Quality Tester
9.5

Excellent

Our Rating
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6

Loovett

Prefessionall Indoor Air Quality Monitor, 5 in 1 Portable Smartair Quality Tester for CO2 | TVOC | HCHO | Temp | Hum for Home Cars Plants and Pets So On（White）
9.3

Excellent

Our Rating
7

SwitchBot
SwitchBot Meter Pro CO2 Indoor Air Quality Monitor 5-in-1, CO2 Alarm, Large Display, Bluetooth Air Quality Tester for Home, Office, 2-Year Data Storage
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.
9.0

Excellent

Our Rating
8

LSENLTY

LSENLTY Portable CO2 Detector, 2s Refresh High Accuracy Carbon Dioxide Monitor, 3 in 1 CO2 Meter(Temperature, Humidity and CO2 Value), 96 Hours Standby Time CO2 Monitor for Travel Camping Home Office
8.9

Very Good

Our Rating

9.9
clearly written

9.3
Precision

8.2
Battery Duration
9

KATZEIST

KATZEIST CO2 Detector, Air Quality Monitor Mini CO2 Meter Portable Detector Temperature Humidity Air Analyzer Digital for Home, Office, Travel (3 in 1-Semi)
8.8

Very Good

Our Rating

9.9
clearly written

8.0
Precision

8.0
Battery Duration
10

Klein Tools
Klein Tools ET110 CO Meter, Carbon Monoxide Tester and Detector with Exposure Limit Alarm, 4 x AAA Batteries and Carry Pouch Included
Main highlights

Accurate CO Measurement
Detects carbon monoxide levels with precision, featuring a clear backlit display.

Ideal for Portable Use
Perfect for safety checks in various environments, including homes and parking garages.

Praised Dual Alarm System
Users appreciate the dual alarm system for low and high CO levels.
8.7

Very Good

Our Rating

9.3
clearly written

8.9
Simple to use

8.2
Precision

10 Best co2 meters of 2025

1

SAF Aranet4 Home: Wireless Indoor Air Quality Monitor for Office or School (CO2, Temperature, Humidity and More) Portable, Battery Powered, E-Ink Screen, App for Configuration & Data History

9.7

9.7

9.5

2

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

3

Temtop CO2 Monitor Indoor air Quality Monitor Portable CO2 Meter, CO2, Temperature, Humidity Home, Office or School

4

Newentor CO2 Monitor, Indoor Air Quality Meters, Carbon Dioxide Detector with Voice Alert, Large Display CO2 Tester, Temperature Humidity Sensor, Alarm Clock for Home, RV, Grow Tents, Black

9.3

8.0

8.0

5

MASHI Air Quality Monitor, Indoor Air Quality Meter Detects CO2, TVOC, Formaldehyde, Humidity, Temperature Multifunctional air Pollution Detector for Home, Office or School, Air Quality Tester

6

Prefessionall Indoor Air Quality Monitor, 5 in 1 Portable Smartair Quality Tester for CO2 | TVOC | HCHO | Temp | Hum for Home Cars Plants and Pets So On（White）

7

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

8

LSENLTY Portable CO2 Detector, 2s Refresh High Accuracy Carbon Dioxide Monitor, 3 in 1 CO2 Meter(Temperature, Humidity and CO2 Value), 96 Hours Standby Time CO2 Monitor for Travel Camping Home Office

9.9

9.3

8.2

9

KATZEIST CO2 Detector, Air Quality Monitor Mini CO2 Meter Portable Detector Temperature Humidity Air Analyzer Digital for Home, Office, Travel (3 in 1-Semi)

9.9

8.0

8.0

10

Klein Tools ET110 CO Meter, Carbon Monoxide Tester and Detector with Exposure Limit Alarm, 4 x AAA Batteries and Carry Pouch Included

9.3

8.9

8.2

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