FIG. 1 is a front perspective view of an air quality sensing device showing my new design. FIG. 2 is a rear perspective view thereof. FIG. 3 is a front view thereof. FIG. 4 is a rear view thereof. FIG. 5 is a top view thereof. FIG. 6 is a bottom view thereof. FIG. 7 is a left side view thereof; and, FIG. 8 is a right side view thereof. Features shown in broken line are for illustrative purpose only and form no part of the claimed design.