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.