Pressure, force applied to a surface per unit area, Gauge pressure, pressure measured relative to atmospheric pressure, Absolute pressure, pressure measured relative to a vacuum, Atmospheric pressure, pressure of the air around us, Vacuum, space with no or very low pressure, Compressed air, air under high pressure, Gas supply, system that provides gas, Gas flow, movement of gas, Flow rate, amount of fluid passing per unit time, Measurement, process of finding a value, Measuring instrument, device for measuring, Pressure gauge, device to measure pressure, Digital sensor, device that gives digital signals, Calibration, adjusting an instrument for accuracy, Measurement error, difference between real and measured value, Deviation, difference from expected value, Tolerance, allowed range of variation, Uncertainty calculation, estimation of possible error, Accuracy, how close to the true value, Precision, consistency of results, Range, limits of measurement, Scale, markings on an instrument, Leakage, unwanted escape of gas or liquid, Pipeline, system of pipes, Valve, device controlling flow, Regulator, device controlling pressure, Barometer, instrument measuring atmospheric pressure, Calibration standard, reference for calibration, Measurement accuracy, correctness of measurement, Measurement precision, repeatability.

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