Yes, air humidity influences air quality — increased humidity reduces the flow of other particles, causing them to remain suspended in the air.
Regarding Airly sensors specifically, there is also a solution that eliminates the impact of moisture on particulate matter readings. Before measurement, the air sample in Airly sensors is conditioned by heating the air by 5°C above the ambient temperature. This slight temperature increase (≥5°C) prevents the dew point from being reached, avoiding condensation.
The sensor’s housing and air intake path are specially designed, and a heated air intake system combined with a fine mesh that condenses water vapor on its surface ensures that humidity does not cause inflated readings of particulate matter concentrations.