The pandemic has made us aware of the indoor air quality. We have learned that it is important to monitor the carbon dioxide (CO2) concentration inside a room for two reasons: To keep productivity up and to reduce the chances of infection especially, when a room is occupied by many people like in classrooms, offices, etc.

A CO2 monitor can help us estimate the risk of infection of the coronavirus as a high concentration number (above 900 ppm) can indicate that too many people are inside a room, and the air hasn’t been renewed as frequently as the regulations indicate, in some countries.

There are a lot of indoor CO2 monitors in the market, I have reviewed many of them, but I thought it is useful to gather them all together in one place and make your life easier.

Airthings Wave Plus

Airthings Wave Plus features a very low power Senseair CO2 sensors. Additionally, it has a Radon sensor, a VOC sensor, and a temperature/humidity/atmospheric pressure sensor. It can operate up to 6 months with just two AA batteries, and it communicates with your smartphone via Bluetooth. Recently, the company has released a QR code based cards that anyone can scan and see the AQ for a particular monitor.

You can find the full review here.

Awair 2nd Edition or Element

Awair 2nd Edition features a Telaire CO2 sensor. Apart from the CO2 sensor, it can measure particulate matter (PM2.5), VOCs, temperature, and humidity. It requires a WiFi router but not necessarily an internet connection as a new beta feature allows you to access the raw sensor data locally. It requires power through the USB-C port.

You can find the full review here.

Airthinx IAQ

Airthinx IAQ is a more robust solution for those who want to deploy a lot of air quality monitors in various buildings/rooms. It measures CO2, VOCs, PMx, temperature, humidity, atmospheric pressure, and formaldehyde. It has two main communication modules WiFi and LTE (3G/4G) for remote locations.

You can find the full review here.

Kaiterra Laser Egg + CO2

Kaiterra Laser Egg + CO2 is a HomeKit enable device that measures CO2, particulate matter (PM2.5), temperature, and humidity. It also comes with a battery that allows it to become a portable AQM for about 8 hours.

You can find the full review here.

Djinn Sensor

Djinn features similar sensors as all the other devices a CO2, PM1.0/PM2.5/PM10, VOC, temperature, humidity, atmospheric pressure, formaldehyde, noise, and light. The unique feature of this monitor is the software as the company offers a lot of analytics in their dashboard which make data more comprehensive, including the Respiratory Virus Risk or Respiratory Health analysis.

You can find the full review here.

uRAD Monitor A3

The uRAD Monitor A3 is again a robust solution and the users can access the measurements from the dashboard. It features a lot of sensors, CO2, PM1.0/PM2.5/PM10, temperature, humidity, pressure, Formaldehyde, ozone, VOC and noice level.

You can find the full review here.

uHoo AQ Monitor

uHoo is a futuristic design air quality monitor with a lot of sensors, including a CO2, PM2.5, VOC, ozone, nitrogen dioxide, temperature, humidity, and pressure. The company also has developed the Virus Index card, where we can see how likely is for an airborne virus to spread in a closed environment.

You can find the full review here.

AirVisual Node

The AirVisual monitor has a CO2, PM2.5/PM10, temperature, and humidity sensors. It has a big LCD display and a battery which allows you to move the device around for a few hours.

You can find the full review here.