A biomedical sensor is disclosed that provides at least first and second electrical nodes for connection to medical equipment. The biomedical sensor includes a plurality of protruding electrodes that extend from a common base. At least one of the protruding electrodes is coupled to the first electrical node, and at least two of the protruding electrodes are coupled to the second electrical node. At least one of the plurality of protruding electrodes is adjustable in length such that each of the plurality of protruding electrodes is adapted to contact a non-planar surface of a subject.