The basic relations between tilt angles and the respective components of the gravitational accelerati:on [Eq. (2) and (3)] are strongly nonlinear, especially within the range of . Nowadays, it is easy to deal with nonlinearity of indications due to application of e.g., microprocessor technology. However, it should be noted that if a characteristic of a sensor is nonlinear, the sensitivity of its indications would vary over its measurement range.