Capacitive band adjustment appliances provided with said band

Band capacitive adjustment, which has at least one detection surface (6) conductive electricidadcubierta by a dielectric (2), part of a capacitor (51, 52) with variable capacity through delcontacto band adjustment (3 ) within an activation zone (23), in which a modification of lacapacidad capacitor (51, 52) in the case of contact within the activation zone (23) depends on laposicion contact (20) along band adjustment (3) and is evaluated by a circuit evaluacion.En which along the band adjustment (3) are arranged adjacent to one another, galvanically isolated conrespecto to the detection surface (6) and electrically isolated from each other a plurality of transverse bands (211-219) electrically conductive covering at least the detection surface (6) in its extensiontransversalmente the band adjustment (3), wherein at least one of the bands Transverse ersales (211 a219) is a cross test strip (25) or that between the transverse bands (211 to 219) is provided at least one transverse strip test (25), that the cross test strip (25) can be connected conmasa for applying ground potential, and that in the transverse test strips (25) aplicapotencial mass for calculating a reference value of the evaluation circuit.