an acceleromter having a test weight movable in relation to a frame includes three pairs of mutually electrically orthogonal conducting parallel faces . electrodes connected to the frame form capacitors with faces of the test weight . the six faces form two sets of three faces and . the faces of a set form a first conductor insulated from the faces of the second set which form a second conductor . position sensing voltages are applied to first and second conductors through very flexible leads . position control voltages derived from the position sensing voltages are applied to the electrodes .