The sensitivity of the air quality sensor seems low?

Generally, low sensitivity of the air quality sensor occurs due to a delay reaction time of the sensor, which can be affected by the units placement and the size of the room the air purifier is in.

For example, if the unit is installed at a lower position in the room, reaction to the smoke of cigarettes or other airborne particles in the higher part of the room may be delayed.

To address any sensitivity issues with the sensor, try altering the placement of the unit or adjust the sensitivity of the air quality sensor on the unit.