- Qualifies if
- A monitor that measures carbon dioxide.
- Ranked by
- Price seen (lowest first)
- Shown
- The top 8 of 11 products in our catalog that meet the rule.
Temtop Portable CO2 Meter
Humidity range: 99 percent. Readings need a few hours to settle after moving it.
INKBIRDPLUS PTH-10C CO2 Monitor
Co2 monitor. Readings need a few hours to settle after moving it.
Newentor C1 CO2 Monitor
Co2 monitor. Readings need a few hours to settle after moving it.
SwitchBot CO2 Detector
Co2 monitor. Readings need a few hours to settle after moving it.
INKBIRDPLUS PTH-9A CO2 Monitor
Co2 monitor. Readings need a few hours to settle after moving it.
Qingping PM10 CO2 Monitor
Co2 monitor. Readings need a few hours to settle after moving it.
Temtop C1 CO2 Monitor
Co2 monitor. Readings need a few hours to settle after moving it.
GoveeLife H5140 CO2 Monitor
Co2 monitor. Readings need a few hours to settle after moving it.
How to choose between them
CO2 is a ventilation gauge: under about 800 ppm the room is getting fresh air, above 1,000 ppm it is stuffy. Bedrooms with closed doors often climb past that overnight.
Look for an NDIR sensor; cheaper 'eCO2' sensors estimate CO2 from other gases and are much less reliable.
Rankings follow the rule and order stated above, using makers' published specifications and listed prices. How we research · Disclosure