The MQ-135 needs to be stabilize for the correct readings. Leave it in open air for 5-6 hours. To understand the units of PPM and AQI index check out the video here:
[ Ссылка ]
![](https://s2.save4k.ru/pic/mivNAaOEdzM/maxresdefault.jpg)
The MQ-135 needs to be stabilize for the correct readings. Leave it in open air for 5-6 hours. To understand the units of PPM and AQI index check out the video here:
[ Ссылка ]