A capacitive measurement device including first measurement device designed to carry out a first measurement function in relation to a nearby object, the first measurement device including a body and, a capacity electrode, both of a substantially conductive material, and a guard electrode placed between the body and the capacitive electrode and insulated from the body on the one hand and from the capacitive electrode on the other hand by dielectric elements; an excitation apparatus which maintains the capacitive electrode and the guard electrode to a desired AC electrical potential; a first electronic apparatus, connected to the capacitive and guard electrodes, for measuring the capacitance between the capacitive electrode and the object; and a second measurement device designed to carry out a second measurement function, which are located in the vicinity of either the capacitive or guard electrode, and maintained by the excitation apparatus to a desired AC electrical potential.