Pneumatic measurement is a relative measurement, which is based on the upper and lower standard parts to achieve precision measurement.
    The size of the upper and lower standard parts is called the absolute size, and the size calculated by the sensor is called the relative size, and the absolute size is the key element to ensure the measurement results.

    The measuring device in the pneumatic measurement is called gas calibration, including the gas probe and the upper and lower standard key. The gas probe realizes the sensing function of dimensional measurement, and the upper and lower standard parts provide the benchmark of measurement.

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