Real-time Detection Of PM2.5 / CO2 / Temperature / Humidity In The Air
![co2 monitor indoor](https://images-na.ssl-images-amazon.com/images/G/01/x-locale/common/grey-pixel.gif)
CO2 levels affect our lives.
Carbon dioxide concentration standard
400-1000ppm: CO2 concentration of fresh outside air
1001-2000ppm: Level of drowsiness or change in physical condition
2001-5000ppm: Headache and stiff shoulders, dizziness, endangering health
Note: The atmospheric environment is unstable, it is easily affected by the environment, and the data may fluctuate slightly.