Small three-dimensional electric field sensor

The small-size 3D electric-field sensor comprises: a shield sensor rotor, three inductive electrodes (X, Y, and Z), an end cover as a back-off basin composed by four arc surfaces and planes fixed with radial electrodes, a supporting plate connected with a 90deg flanged edge on bottom of end cover, a drive unit, and a shell. This invention has light weight and little interactive interference among three directions.