The ornamental design for a motionsensor, as shown and described.
FIG. 1 is a front perspective view of a motion sensor, showing our new design;
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 rear perspective view thereof;
FIG. 9 is an exploded view thereof; and,
FIG. 10 is a perspective view thereof, shown in an environment of use.
The broken lines shown in FIGS. 3, 7, 8 and 10 showing portions of the motion sensor form no part of the claimed design; and the broken lines in FIG. 10 showing a cat, a door and a wall are environment and form no part of the claimed design.