Moes CO2 Air Quality Monitor Review: A Portable 3-in-1 CO2, Temperature and Humidity Display
Color screen, built-in battery and Alexa, Google Home and Home Assistant support, focused on CO2 rather than particulates.
The Moes CO2 Air Quality Monitor is a three-in-one desktop unit: CO2, temperature and humidity, shown on a color screen and mirrored to your phone over 2.4 GHz Wi-Fi. Unlike most CO2 monitors in this class it works with Alexa, Google Home and Home Assistant through Tuya, and its built-in 2400 mAh battery lets you carry it from room to room for a few days of spot checks between charges. The catch is scope: there is no particulate, TVOC or carbon monoxide sensing, and the only alert it can raise is the air quality one, not temperature or humidity thresholds.
- CO2 and ventilation tracking
- Room-to-room spot checks
- Alexa and Google Home homes
- Tuya and Home Assistant setups
Pros
- CO2, temperature and humidity in one unit
- Color screen readable without a phone
- Built-in 2400 mAh battery makes it portable between rooms
- Works with Alexa, Google Home and Home Assistant (via Tuya)
- Air quality alerts and automation support
- Two year warranty
Cons
- No particulate sensing: no PM0.3, PM1, PM2.5 or PM10
- No TVOC, NOx, carbon monoxide or radon sensing
- No temperature or humidity alerts, only air quality alerts
- No Apple HomeKit, SmartThings, IFTTT or Matter support
- Battery lasts around 40 hours, so continuous use means staying plugged in
- 2.4 GHz Wi-Fi only, and the screen is not a touchscreen
- Indoor only, with no weather resistance rating
Who is the Moes CO2 monitor for?
It fits someone whose question is ventilation rather than pollution: an office, bedroom or classroom where the air gets stuffy and you want a number on the wall to prove it. The color screen makes it readable at a glance without a phone, and because it has a built-in battery you can move it between rooms to find the one that never clears. Its integration list is broader than most niche monitors, covering Alexa, Google Home and Home Assistant, so the readings do not have to stay locked in one app.
What the Moes monitor measures
Three readings, all of them the comfort-and-ventilation kind. CO2 is the headline: indoors, high carbon dioxide is what causes stuffiness, poor sleep and trouble concentrating, and it climbs fast in a closed room with people in it. Temperature and humidity fill in the comfort picture, with humidity mattering for both mold risk when it stays high and skin and throat irritation when it drops too low. Air quality alerts can fire when readings cross the threshold, and the monitor supports automations, so a CO2 spike can be used to trigger a fan or a purifier in your smart home platform.
What to know before you buy
This is not a pollution monitor. There is no particulate sensing (no PM0.3, PM1, PM2.5 or PM10), no TVOC, no NOx, no carbon monoxide and no radon, so smoke, dust, pollen and off-gassing from cleaners or new furniture are all invisible to it. On alerts, only the air quality alert is supported: temperature and humidity thresholds cannot raise a notification. Apple HomeKit, Samsung SmartThings, IFTTT and Matter are unsupported, and Home Assistant support comes through the Tuya integration rather than a local one. The battery is rated at about 40 hours, which makes it portable for spot checks but not a cord-free permanent install, and it connects only on 2.4 GHz Wi-Fi. The screen is not a touchscreen, and the unit has no weather resistance rating, so it stays indoors.
Is the Moes CO2 monitor worth it?
Value here comes from the combination rather than any single spec: a readable color display, mainstream voice assistant support and a battery that makes it portable, all pointed at the one indoor reading most people actually act on. Two years of warranty coverage is longer than the category norm. If you need particulates or want temperature and humidity alerts, look at a broader monitor. If you want to see CO2 climb in the room you are sitting in and have Alexa or Google Home tell you about it, this covers that job.
Frequently asked questions
Does the Moes CO2 monitor work with Alexa and Google Home?
Yes. Both Alexa and Google Home are supported, as is Home Assistant through the Tuya integration. Apple HomeKit, SmartThings, IFTTT and Matter are not supported.
Does it measure PM2.5 or other particulates?
No. It measures CO2, temperature and humidity only. There is no particulate, TVOC, NOx or carbon monoxide sensing.
Can the Moes CO2 monitor run on battery?
Yes. It has a built-in 2400 mAh lithium battery rated at about 40 hours, and it recharges over USB-C. For permanent placement most people leave it plugged in.
Can it alert me when the room gets too hot or too humid?
No. Only air quality alerts are supported. Temperature and humidity are displayed and logged, but they cannot trigger an alert on the device.
What Wi-Fi does it need?
2.4 GHz. The 5 GHz band is not supported, so the phone doing the setup should be on the 2.4 GHz network.


