Air quality monitor

FIG. 1 is a perspective view of an air quality monitor, showing our new design in a first embodiment;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is another side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a perspective view of an air quality monitor, showing our new design in a second embodiment;

FIG. 9 is a front view thereof;

FIG. 10 is a rear view thereof;

FIG. 11 is a side view thereof;

FIG. 12 is another side view thereof;

FIG. 13 is a top view thereof;

FIG. 14 is a bottom view thereof;

FIG. 15 is a perspective view of an air quality monitor, showing our new design in a third embodiment;

FIG. 16 is a front view thereof;

FIG. 17 is a rear view thereof;

FIG. 18 is a side view thereof;

FIG. 19 is another side view thereof;

FIG. 20 is a top view thereof; and,

FIG. 21 is a bottom view thereof.

The broken-line disclosure in the views is generally understood to form no part of the claimed design.