Since there is no exact consensus on the reporting of nonlinearity,it is important to know how the mapping error is defined when evaluating the specifications of a position sensor. A less conservative definition than that stated above may exaggerate the accuracy of a sensor and lead to unexplainable position errors. It may also be necessary to consider other types of nonlinearity such as hysteresis [21]. However, sensors that exhibit hysteresis have poor repeatability and are generally not considered for precision sensing applications.