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Carbon Dioxide Detector Indoor Comparison - April 2025
| 1 Best Choice  9.7Exceptional | 2 Best Value  9.6Exceptional | 3  9.5Excellent |
| View DealOn Amazon | View DealOn Amazon | View DealOn Amazon |
ModelTemtop Air Quality Monitor CO2 Detector Professional Carbon Dioxide PM2.5 PM10 Formaldehyde Temperature and Humidity Monitor w/Audio Alarm Data Export (M2000 2nd) | Model 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 | Model Lunarlipes Portable 4-in-1 Carbon Monoxide Detectors, Mini Carbon Monoxide and Carbon Dioxide Monitor with Magnetic Suction, RV CO CO2 Detector Alarm Temp/Humidity Sensor, CO CO2 Air Quality Monitor |
BrandTemtop | Brand Newentor | Brand Lunarlipes |
Reviews | Reviews | Reviews  |
Features | ||
Clearly written 9.4 | Clearly written 9.4 | Clearly written 8.9 |
Tech Specs | ||
product dimensions11.18 x 5.35 x 7.64 inches 1.96 Pounds | product dimensions 4.72 x 0.74 x 3.54 inches 4.8 ounces | product dimensions 2.99 x 1.18 x 2.75 inches |
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
9.7
1TemtopTemtop Air Quality Monitor CO2 Detector Professional Carbon Dioxide PM2.5 PM10 Formaldehyde Temperature and Humidity Monitor w/Audio Alarm Data Export (M2000 2nd)
9.4 clearly writtenWhy 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.
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9.6
2Newentor36% Off
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
9.4 clearly writtenWhy we love it
Accurate CO2 measurements.
Customizable alert settings.
Bright, easy-to-read display.
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9.5
3Lunarlipes
Lunarlipes Portable 4-in-1 Carbon Monoxide Detectors, Mini Carbon Monoxide and Carbon Dioxide Monitor with Magnetic Suction, RV CO CO2 Detector Alarm Temp/Humidity Sensor, CO CO2 Air Quality Monitor
8.9 clearly writtenMain highlights- 【SHOP WITH CONFIDENCE】Your satisfaction is our top priority. We provide 3 years service and lifetime technical support for CO CO2 detector portable. If you encounter any problems, just contact us through Amazon Customer Service or Q&A and we will reply within 12 hours. risk-free shopping. Customer satisfaction is our tireless pursuit.
- 【OUTDOOR LANYARD & MAGNETIC SUCTION】The bottom of the CO CO2 air quality monitor can be placed freely, you can put it on the table in the living room, kitchen, bedroom, etc. And it is equipped with a special outdoor lanyard, which is convenient for you to carry and use in outdoor activities such as travel, camping, picnic, and adventure. There is also a magnetic function on the back of the CO CO2 monitor, which can be attached to any metal area such as home appliances or cars.
- 【LARGE CAPACITY BATTERY & FAST CHARGING】The MINI 4-in-1 CO detector has a built-in 1000mAh lithium battery for long-lasting power. Support QC2.0, PD3.0, AFC, USB C UFP (BC1.2 DCP CDP SDP) and other common fast charging protocols 10~65W charging. When the CO detector is not operated for 5 minutes, it will automatically turn on the energy saving mode (the brightness of the screen will be reduced), and you can click the "function button" to turn on the backlight.
- 【HIGH-PRECISION 4-IN-1 CO DETECTOR】The portable 4-in-1 carbon monoxide detector can monitor the current CO, CO2, temperature and humidity in the air in real time. Equipped with a high-precision sensor (10-year life), the detectable CO concentration range is 0~1000PPM, the CO2 concentration range is 400~5000PPM, and the temperature range is 14~122℉ / -10~50℃, humidity range is 0~95%RH. The data is accurate without delay and monitored in real time.
- 【CO2 LIGHT INDICATION & CUSTOMIZED ALARM VALUE】The carbon dioxide monitor can present a 3-stage light indication according to the CO2 concentration. 400~699PPM (green flashing=safe), 700~1499PPM (yellow flashing=warning), 1500~5000PPM (red flashing=danger). By default, the audio alarm sounds when it reaches 1500PPM. You can double-click the "Function Button" to customize the CO2 concentration alarm threshold. Note: The device must be in the "CO₂" interface before entering the CO2 custom setting.
- 【CO LIGHT INDICATION & CUSTOMIZED ALARM VALUE】The carbon monoxide monitor can present 3-stage light indication based on CO concentration. 0~49PPM (green flashing=safe), 50~99PPM (yellow flashing=warning), 100~1000PPM (red flashing=danger). By default, the CO monitor will sound an alarm when it reaches 50PPM. You can double-click the "function button" to customize the CO concentration alarm threshold. Note: The device must be in the "CO" interface before entering CO custom settings.
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