Sensor

FIG. 1 is a front, left, and top perspective view of the sensor embodying the new design; FIG. 2 is a rear, right, and bottom perspective view thereof; FIG. 3 is a front perspective view thereof; FIG. 4 is a rear perspective view thereof; FIG. 5 is a left side view thereof; FIG. 6 is a right side view thereof; FIG. 7 is a top view thereof; FIG. 8 is a bottom view thereof; and, FIG. 9 is a front, left, and bottom perspective view thereof. The broken lines in the figures are shown for the purpose of illustrating portions of the sensor and/or environmental matter and form no part of the claimed design. The dot-dash broken lines define the bounds of the claimed design and form no part thereof.