The accuracy of the sensor signal is not only dependent on the sensor characteristics but mainly on the applied conditioning. Many processes require variables to be measured to an accuracy of more than 1 percent over the full range,
which means not only very accurate sensing, but also temperature compensation,
linearization, zero set, and span adjustment. Temperature compensation is achieved in many sensors by using them in bridge circuits but further compensation may be needed to correct for changes in the variable due to temperature.
Such things as op-amp offset and amplification are affected by supply voltages so that these will have to be regulated and care must be taken with grounding of the system to minimize noise and zero offset. Careful selection is needed in the choice of components. Quality close tolerance components and the use of impedance-matching devices are required to prevent the introduction of errors in conditioning networks.