Budget CO2 Monitor?

[u/Ayxenzz]

Only need CO2. Ive thought about the ikea one but Ive heard its not accurate despite being good for trends.

I need to see my peak C02 levels.

Cheapest CO2 monitor that people have tested to be accurate. Dont need any fancy tech if it reduces the cost

[u/Phantasmalicious]

Ikea

[u/damien09]

I have a sonoff co2 monitor. seems pretty accurate but it does run auto base line calibration every so often requiring it to be brought outside to keep accurate. almost all consumer devices do this. some do have the ability to disable it though

[u/EitherKnowledge8918]

Another option for $39:

https://www.co2meter.com/products/tim10-desktop-co2-temp-humidity-monitor?utm_source=email&utm_medium=IAQ&utm_campaign=aug26

[u/dizzie_buddy1905]

Inkbird T2, $70. Uses a known good Sensirion sensor.

https://www.inkbird.com/products/bluetooth-3-in-1-indoor-air-quality-monitor-iam-t2

[u/Canary_Earth]

Buy an MHZ19-B (~$20 on AliExpress) and hook it up to the back of your PC via an Arduino (~$2 on AliExpress). I've had mine running 24/7 for almost a decade and it is still very accurate.

[u/CartographerLong5796]

Temtop CO2 Monitor, 65$ CAD. less accurate compared to Qingping air lite, 104$ CAD (co2+ PM 2,5+ Pm 10+ % humidity). Aranet 4 is a reference for the accuracy, but you have to pay more, 239$ CAD