The invention relates to a measurement device for measuring the rotational speed of a vehicle wheel, the measurement device comprising a body (22) incorporating: a rotor (30) which can be rotated by the wheel and on which at least one permanent magnet (33) is mounted; a stator (31) comprising a winding (36) generating a measurement voltage when the wheel (2) and therefore the permanent magnet turn, the measurement voltage being indicative of the rotational speed of the wheel; an electronic board (32) comprising processing means for processing the measurement voltage; power supply means designed to generate, from the measurement voltage, a power supply voltage intended to power the electronic board.