Appliance (200;500) comprising: - at least one electrode , called measurement electrode, polarized at an alternating electrical potential (V G ), called detection electrical potential, different from a ground potential , at a frequency, called detection frequency, in order to detect at least one object in a detection zone , and - at least one capacitive detection electronics , connected to said measurement electrodes , in order to detect a signal with respect to a capacitive coupling between said object and said measurement electrode or at least one of said measurement electrodes ; characterized in that said appliance (200;500) also comprises: - an electric line , comprising at least one electric wire, in said detection zone ; - at least one spacing means (204;302;402) for distancing said electric line in order to position it at a distance from the at least one measurement electrode comprised between: ▪ a distance (D min ), called minimum distance, corresponding to the distance beyond which an electric line, called reference electric line, with a predetermined dimension, generates a coupling capacitance with the at least one measurement electrode , less than a predetermined threshold capacitance; and ▪ a distance (D max ), called maximum distance, corresponding to the distance beyond which an object, called reference object, with a predetermined dimension, greater than the dimension of said reference electric line, generates a coupling capacitance with the at least one measurement electrode , less than said threshold capacitance. - at least one electrode , called measurement electrode, polarized at an alternating electrical potential (V G ), called detection electrical potential, different from a ground potential , at a frequency, called detection frequency, in order to detect at least one object in a detection zone , and - at least one capacitive detection electronics , connected to said measurement electrodes , in order to detect a signal with respect to a capacitive coupling between said object and said measurement electrode or at least one of said measurement electrodes ; - an electric line , comprising at least one electric wire, in said detection zone ; - at least one spacing means (204;302;402) for distancing said electric line in order to position it at a distance from the at least one measurement electrode comprised between: ▪ a distance (D min ), called minimum distance, corresponding to the distance beyond which an electric line, called reference electric line, with a predetermined dimension, generates a coupling capacitance with the at least one measurement electrode , less than a predetermined threshold capacitance; and ▪ a distance (D max ), called maximum distance, corresponding to the distance beyond which an object, called reference object, with a predetermined dimension, greater than the dimension of said reference electric line, generates a coupling capacitance with the at least one measurement electrode , less than said threshold capacitance. ▪ a distance (D min ), called minimum distance, corresponding to the distance beyond which an electric line, called reference electric line, with a predetermined dimension, generates a coupling capacitance with the at least one measurement electrode , less than a predetermined threshold capacitance; and ▪ a distance (D max ), called maximum distance, corresponding to the distance beyond which an object, called reference object, with a predetermined dimension, greater than the dimension of said reference electric line, generates a coupling capacitance with the at least one measurement electrode , less than said threshold capacitance. <EOS>