Abstract: A process for correcting differential pressure signals which takes into account the disturbance variables, temperature and static pressure, that influence the absolute pressure and thereby reduce the accuracy of the corrected differential pressure signals. A corrected differential pressure signal is recursively calculated from a measured differential pressure signal, a measured absolute-pressure signal and a temperature signal in combination with a plurality of lower degree correction polynomials. The corrected differential pressure signal may be further processed via a linearization polynomial to produce a linearization correction signal which, when combined with the corrected differential pressure signal, produces a linearization differential pressure signal. Recursivity in the calculation of the corrected differential pressure signal links residual errors into the correction process despite the use of relative simple lower degree correction polynomials.