A displacement transducer consists of an electrometer through which charge transport is limited by Coulomb blockade and a displacement member which degenerates the Coulomb blockade effect as a function of displacement. The electrometer comprises a nanofabricated conductive island (1) with a source and drain (2, 3) coupled to the island through tunnel junctions (T1, T2). A movable metallic element (4) forms a capacitive coupling (Cg) with the island, which degenerates the Coulomb blockade as a function of displacement ( delta x), so that the current flow between the source and drain is a function of the displacment of the element (4). <IMAGE>
