The ornamental design for a portableelectronicsensor, as shown and described.
FIG. 1 is a perspective front view from above of the portable electronic sensor, mounted to a mount.
FIG. 2 is a perspective rear view from below of the sensor.
FIG. 3 is a front view of the sensor.
FIG. 4 is a rear view of the sensor.
FIG. 5 is a top view of the sensor.
FIG. 6 is a bottom view of the sensor; and,
FIG. 7 is a side view of the sensor.
The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design.