We claim the ornamental design for a photoelectric sensor, as shown and described.
FIG. 1 is a front perspective view of a photoelectric sensor of the present invention;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a first side view thereof;
FIG. 5 is a second side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a cross-sectional view taken along the line 8-8 in FIG. 2.
The broken lines in the drawings represent portions of the photoelectric sensor that form no part of the claimed design. Additionally, the dash-dot-dashed lines in the drawings define the boundaries of the claimed design.