The invention relates to a sensor for measuring a physiological parameter of a subject, comprising:a body (32) in an electrically insulating material, the body (32) comprising a base (31) and a plurality of protrusions (34) projecting from the base (31), anda plurality of capacitive elements (37) in an electrically conductive material, embedded inside the body (32), each capacitive element (37) being positioned inside the body (32), at an end of a respective protrusion (34), so that when the ends of the protrusions (34) are in contact with the skin of the subject, the capacitive elements are at a predefined distance from the skin.
