What the source of error in the experiment of calibration of pressure gauge?

The sources of error in the calibration of a pressure gauge can include instrumental inaccuracies, such as the inherent limitations of the gauge itself or the calibration equipment used. Environmental factors, such as temperature fluctuations or vibrations, can also affect readings. Additionally, human error in reading or interpreting the gauge can contribute to discrepancies. Finally, the pressure medium's characteristics, like viscosity or density, may alter the gauge's response and lead to inaccuracies.