Device (1) for measuring a liquid level, comprising: —a body (2) extending along a longitudinal axis (X) and having at least one open portion (5) in which at least one aperture (A) is formed in the wall of the body (2), —a loop (10) of electric wire positioned at least in the open portion (5) so that it can be in contact with the liquid and run substantially parallel to the longitudinal axis (X) of the body (2), —an electric power supply circuit (15, 16) for powering the loop of wire arranged in the body, the circuit comprising two end fittings (16) positioned in the open portion (5), each end fitting (16) being connected to one of the open ends (11) of the loop (10), the end fittings (16) being arranged in an offset manner along the longitudinal axis (X) of the body (2).