Affordable alternative to aranet4 CO2 sensor – GreenBuildingAdvisor

I have one aranet4(about to buy another)

And two qingping ndir CO2 sensors.

Aranet4 was about $150

Qing ping was $60

Both have integrations for home assistant.

Aranet4 has Bluetooth while qingping has wifi.

Aranet4 has a very long battery life but is not rechargeable ,qingping only lasts a few days but is rechargeable and can be left plugged in. 

For anyone wanting to measure CO2 and save some money I can recommend the qingping CO2 sensor. Imo it’s just as accurate as the aranet4

https://imgur.com/a/zih0DSR