Air quality sensor

This 6-in-1 sensor can detect six environmental parameters:

Temperature
Humidity
PM2.5
VOC of poisonous gas
Formaldehyde (not really accurate)
CO2 (not really accurate, then you need a dedicated one)

All these values can affect the health of your home environment.

Normally, you would need a separate sensor for each parameter.

Because the price is low, there are some downsides in sensor precision: the formaldehyde and CO2 readings are not as accurate as dedicated sensors. For the other parameters, it is a good overall air quality sensor to show whether you need some fresh air indoors.