An electrostatic powder coating system that comprises a booth, the lower part of which is designed in the shape of a V, and a collecting channel, connected to a suction device underneath, the booth having two ends, each of which has a pass-through opening for the workpieces. The multi-resolution CCD sensing apparatus includes a photo sensor set, a shift gate, and several CCD shift registers. An adjustive component is rotatably mounted to the rear wall of the housing. The first geometry is compressible and dryable to a second geometry smaller than the first geometry, and the second geometry is expandable and rehydratable to a third geometry larger than the second geometry. Method of assembling this bridge on this plate with this device.