i e the windowpane 12 as the shaft 28 rotates the position sensor 30 identifies where along the rotation the shaft 28 is as well as how many rotations the shaft 28 has executed the degree of accuracy of the position sensor 30 is a variable that will depend on the specific design in one embodiment the position sensor 30 is a hall effect sensor that utilizes a single magnet not shown that is secured to the shaft 28 the magnet rotates with the shaft 28 and its magnetic field affects the position sensor 30 as it passes thereby in an alternative embodiment the position sensor is a hall effect sensor that is secured to a portion of the mechanism not shown that moves the windowpane between the open and closed positions the position sensor 30 could be secured to a drive screw glass run channel or some other portion of the mechanism that moves proportionally to the windowpane or closure panel 12 a capacitive sensor 32 is mounted relative to the window frame in a spaced relation and electrically connected to the controller 18 the capacitive sensor 32 is capable of determining changes in magnetic fields in the surrounding space due to the introduction of an object that has a dielectric that is different than that of the.