Static pressure influences significantly on measurement precision of metal capacitive differential pressure transmitter.A high-precision measurement system is used

which has been designed to evaluate static pressure effect on the metal capacitive differential pressure transmitters.Measurements have been carried out based on this system.The results show that

as the static pressure increasing

the measurement error increases.The measurement error is far more than the tolerance range

when the static pressure reaches 4 MPa.Under the same static pressure

the measurement error grows with differential pressure growing.Since the static pressure lead to a systematic effect on the measurement results

the measurement error can be corrected.After the correction

the measurement error is in the allowable range.The research result provides a feasible method to reduce the influence of static pressure on the metal capacitive differential pressure transmitter.