Mijia Air Quality Co2s of 2025
Best Choice1
TemtopTemtop 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 clearly written8.9 User interface8.7 Simple to useWhy we love it
Comprehensive air pollution monitoring with advanced sensors.
Customizable audio alarm and colorful air quality indicator.
USB data export and easy calibration for accurate readings.
9.8Exceptional
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Using our advanced technology, we scan thousands of products and stores, analyzing reviews, ratings, and trends to find what matters most to users like you.Our team then reviews the data and real user feedback, combining AI and human insights to bring you real-time, top-rated recommendations to guide your decisions with clarity and confidence.
Value for Money2
Gain ExpressCO2 Meter Air Quality Monitor Handheld CO2 Monitor 0~9999ppm Measurement Carbon Dioxide Temperature Humidity Detector NDIR Sensor Indoor Outdoor Air Quality Tester
9.3 Precision9.1 clearly written8.7 Simple to useWhy we love it
High accuracy
Large measuring range
User friendly
9.7Exceptional
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3
SwitchBotSwitchBot 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
Why we love it
Large, easy-to-read display.
Accurate CO2 and air quality monitoring.
Customizable alerts for safety.
9.4Excellent
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4
Qxpztk33% Off10 in 1 Indoor Air Quality Monitor with Portable Sensors for CO2, PM2.5, Temperature & Humidity,VOC Sensor and AQI,Accurate Formaldehyde,CO2 Detector Monocular,Suitable for Home,Black E1
Main highlights- RELIABLE TEST RESULTS:Including highly sensitive PM2.5 laser sensor and formaldehyde sensor.10-in-1 indoor air quality monitor provides accurate and reliable air detection,track pollutants and contaminants before they become a problem with this always-on indoor
- PERFECT COMPANION FOR INDOOR ENVIRONMENTS:Committed to providing users with reliable and accurate air quality monitoring,and continue to promote scientific and technological innovation to improve the quality of the living environment.10-in-1 air quality monitor Use this high-precision smart sensor,Real-time detection of multiple types of air pollution（CO2,VOCs, AQI,PM2.5 &PM10,Formaldehyde）Protect the health of family
- LARGER BATTERY CAPACITY:With a powerful 5000 mAh rechargeable lithium polymer battery, you can unplug the air monitor and easily move it to monitor different rooms in your home or office with a standby time of more than 12 hours
- KEEP YOUR BREATH GOING:The CO2 detector is perfect if you are near a wildfire – or if you depend on old or wood powered appliances in your home. 10 in 1 is also a carbon dioxide monitor and guards your air quality by letting you know when particulate matter and VOCs are unusually high,When the CO2 exceeds 2000, the color will change to yellow to red, and the buzzer will give a warning
- ACCURATE FORMALDEHYDE DETECTOR:Formaldehyde pollution is very harmful to the mucous membranes of the eyes,nose and throat,and needs to be paid attention to at all times.We works tirelessly to ensure the overall quality of every indoor air quality monitor through rigorous testing
9.1Excellent
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5
Bcetasy11-in-1 Air Quality Monitor - Portable Indoor Air Quality Detector with Stand, Real-Time Test for AQI, CO2, PM2.5, PM1.0, PM10, TVOC, HCHO, Particles, Temperature & Humidity with Aler (White-White)
Main highlights- 【Versatile Application】This all-in-one indoor air quality monitor is perfect for living rooms, kitchens, basements, offices, grow tents, cars, and more. Its small footprint and user-friendly interface make maintaining a healthy environment effortless.
- 【Product Usage Notes】①Before first use, charge the device for at least 10 minutes, then press and hold the power button to turn it on. ②If readings appear inaccurate over time, restart the device to recalibrate the sensors. ③For further assistance, contact us anytime. We guarantee a satisfactory response within 12 hours.
- 【Multi-Sensor Fusion Technology】Featuring NDIR infrared CO2, laser particle, semiconductor, photoelectric, temperature & humidity sensors, this indoor air quality detector responds instantly and precisely, giving you trustworthy data on CO2 levels, PM2.5 concentration, TVOC emissions, and more.
- 【Long-Lasting Battery】Powered by a 2500 mAh rechargeable battery and fast USB-C port, this detector runs for 11-12 hours on a single charge. Low-power consumption and portable design mean uninterrupted indoor air quality monitoring wherever you go.
- 【Color & Sound Dual Alarm Systems】Built-in color-coded icons (Green for Good Yellow Moderate Orange Poor Red Unhealthy) and a loud ticking alarm notify you the moment any gas threshold is exceeded. The flashing light and screen color change help you take action fast to improve indoor air quality.
- 【Clear LCD Display】The large backlit LCD screen on this portable air quality monitor shows each reading in vibrant color reminders. Brightness adjusts to your environment-day or night-so you can check temperature, humidity, AQI and more at a glance.
- 【11-in-1 Portable Air Quality Monitor】Monitor 11 critical air quality indexes in real-time: AQI, CO2, PM1.0/PM2.5/PM10, Particle count, HCHO, TVOC, temperature, Humidity, and dual alarm systems. This laboratory-grade indoor air quality monitor provides precise detection of hazardous substances like construction dust, mold spores, and chemical off-gassing.
9.0Excellent
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6
AirKnight Monitoring11% OffAirKnight 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
Why we love it
Detects multiple pollutants in real-time.
Portable with long battery life.
User-friendly with clear display.
8.9Very Good
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7
PERFORMANCE GURU26% Off16-in-1 Air Quality Monitor Indoor with 7AQI Beep Alarm, CO2 Monitor, Air Quality Detector with PM1.0 | PM2.5 | PM10 | Temp | HUM | Formaldehyde | VOC Tester for Home Office Plant
Main highlights- [Compact Size & Packaging]: 106x89x49 mm/4.17x3.5x1.9 inch, this air quality monitor is compact and lightweight, making it convenient for travel. The package includes 1 x air quality monitor, 1x charge, 1 x USB cable, and 1 x user manual.
- [Colored Display Date & Easy to Read]: Each value is shown in its own color(green/yellow/red), making it easy to determine whether the current air quality is healthy. All data is displayed independently on a high-resolution color screen. The displayed numerical measurements are clear and easy to read.
- [Buzzer Alarm]: The air quality monitor built-in "BBB..." buzzer will trigger an alarm whenever any air quality level reaches a dangerous threshold, promptly alerting you to current air conditions. Once activated, the buzzer can be manually turned off to ensure it doesn’t disturb your rest time.
- [Battery-Powered]: Up to 8 hours of continuous use. USB interface with a built-in high-capacity lithium battery, so you don’t need to keep it plugged in. It’s portable and easy to move, perfect for use at home or in the office.
- [16-in-1 Multifunction]: This air quality monitor measures not only 7X AQI, but also CO2, temperature, humidity, formaldehyde (HCHO), volatile organic compounds(VOC), PM1.0, PM2.5, and PM10. It combines multiple functions to comprehensively monitor various air quality parameters, resampling every 1.5 seconds to provide real-time data and continuously protect your every breath.
8.7Very Good
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8
Nanezan12 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】
Main highlights- 【Various Use】Indoor air quality monitor is indispensable for a family. Help for detecting gas and air pollution in homes, kitchens, bedrooms, offices, schools, cars, hotels, travel, camping, parties, etc., to always protect you and your family under healthy air conditions.
- 【Portable & Wide Application】 This Air Quality Tester For Home comes with a 5000 mAh battery. Can be plugged in or used wirelessly, easy to carry and move around, allowing it to quickly switch between different environments for air quality testing. Can be used in living room, bedroom, office, hotel, car, hospital, school, factory and other places, it's very convenient. This stylish looking Air Quality Monitor Indoor helps users maintain a healthy and comfortable indoor environment.
- 【Easy to Use】The Air Quality monitor’s user-friendly design, it only takes about a minute from opening the box to having it plugged in and reading data. The buttons on the back are self-explanatory, it’s straightforward to set up and operate, with features that are intuitive and require minimal effort to understand. With a detailed and informative instruction manual. If you have any question about Air Quality Monitor Indoor, please actively contact us, we will respond within 24 hours.
- 【Dual Chip & High Accuracy】 This Air Quality Monitor Indoor carries the newly upgraded 5.0 dual chip, Employs two separate but synergistic chips, one to process the data collected by the sensors and the other to manage the device's user interface, Higher processing speeds ensure that users receive real-time and accurate air quality information. This Indoor Air Quality Monitor makes a quantum leap in technology, provides unprecedented convenience and accuracy in the user experience.
- 【CO2 Alarm & AQI Smiley Face】 The CO2 alarm function of this Air Quality Tester For Home is a crucial safety feature! Mountain fires produce a lot of CO2, when indoor CO2 concentration exceeds the safety threshold, the device will automatically trigger an alarm with a buzzing sound. when indoor AQI indicator in the "Good" range, the smiley face will appear on the screen, the smiley face slide left or right is really helpful in determining an overall picture of your air quality.
- 【12-in-1 Air Quality Monitor Indoor】 The Nanezan multi-function Indoor Air Quality Monitor is an ideal choice. Is a very useful monitor to keep an eye on the air quality in your home. The Air Quality Monitor’s array of sensors provides a wealth of information: CO2, TVOC, PM1.0, PM2.5, PM10 indication, Humidity, Temperature and time, it also has a CO2 alarm. The surface of the product is skin-friendly and the texture looks very delicate. This Air Quality Tester For Home, keep your family breathing easily.
8.6Very Good
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9
Ligamentexa18% Offair Quality Monitor Indoor, 15-in-1 Smart Air Quality Tester with PM, CO2, CO, TVOC, HCHO, PM, AQI, Temperature & Humidity, Timer, Real Time Display, Battery Powered, for Home & Office
Main highlights- Smart Home Integration & Toxicity Alerts： Sync with the smart home app integration to remotely control this air quality monitor indoor, set custom thresholds for home air toxicity testing, and receive push notifications when CO2 or VOC levels exceed safety standards. Historical data tracking helps identify pollution patterns in kitchens, offices, or cars
- Professional-Grade Accuracy for Health-Conscious Homes： Equipped with dual ventilation sensors and smart calibration technology, this indoor air quality monitor for home provides reliable data on CO2 levels, airborne particles, and humidity monitor capabilities. Its industry-leading sensors detect even subtle changes in air quality, triggering instant alerts when harmful thresholds are reached-ideal for allergy-prone households and nursery environments.
- Intuitive Color-Coded Display & Multi-Scenario Use： The 7-inch LCD screen visualizes 11 datasets through dynamic color zones (green/yellow/red). Use this co2 meter in basements, HVAC systems, or during renovations its portable design and 6-hour battery life adapt to any environment needing air quality monitor co compliance checks
- All-Day Monitoring with Professional Features： Combining temperature and humidity monitor capabilities with a premium 2000mAh battery, this device supports continuous operation via Type-C charging. Includes wall-mount design and casing with rounded edges, making it a permanent guardian for your home’s air safety
- 15-in-1 Indoor Air Quality Monitor for Comprehensive Protection： This advanced indoor air quality monitor tracks 16 critical parameters, including AQI, CO2, HCHO, TVOC, PM0.3-PM10, temperature, and humidity. Designed for home air toxicity testing, it delivers real-time detection of pollutants and allergens, ensuring your family s safety with laboratory-grade precision
8.5Good
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10
EGCO2 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 clearly written8.2 Simple to use8.0 User interfaceWhy we love it
Readable LED display
Monitors air quality
Checks temp. humidity
8.4Good
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