Non-invasive radio frequency sensor

[0001]FIG. 1 is a front, upper perspective view of a third embodiment of a non-invasive radio frequency sensor according to our new design.

[0002]FIG. 2 is a rear, bottom perspective view thereof.

[0003]FIG. 3 is a front side view thereof.

[0004]FIG. 4 is a rear side view thereof.

[0005]FIG. 5 is a left side view thereof.

[0006]FIG. 6 is a right side view thereof.

[0007]FIG. 7 is a top view thereof; and,

[0008]FIG. 8 is a bottom view thereof.

[0009]The dash-dash-dash broken lines in the drawings depict environmental subject matter only and form no part of the claimed design.