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.