Powder overspray that is extracted from a spray booth is recovered back to a powder supply that is used to supply powder to the spray guns inside the spray booth. The weighing scale includes a casing, a weight display and a weighing pan. In addition, the cable redirecting device has a cable guiding portion which is not a figure of revolution about the axis of rotation relative to the fixed device. A housing is attached to the vehicle and has the second end and the magnetic field generator contained therein.