A detection device including: a measurement electrode, and a second electrode separated from one another by a distance (D) that is elastically modifiable locally, by a load exerted by an object on a detection surface, and a controller arranged in order to: connect the electrodes to an alternating guard potential (Vg) in order to measure a capacitance representing an approach and a contact; and connect the second electrode to a second potential a second potential proportional to the guard potential (Vg) and having a different amplitude, or to the ground potential (G), in order to measure a capacitance representing a pressure. Also provided is a detection method utilizing such a detection device.