Capacitance sensing apparatuses are described. The apparatus includes capacitance sensor elements that traverse a sensing region. The apparatus also includes sensor circuitry that has multiple inputs. More than one of the capacitance sensor elements are electrically coupled to the same input. A position of an object along an axis of the sensing region is unambiguously identified according to which subset of the inputs senses a change in capacitance that is induced when the object is proximate to the sensing region.