gauge pressure

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gauge pres·sure

pressure measured relative to ambient atmospheric pressure; at sea level, it is 1 atmosphere less than the pressure in the atmosphere. Compare: absolute pressure.
References in periodicals archive ?
Pressure sensors and transducers for liquid and gas systems measure positive, negative, and absolute gauge pressures.
offers ST 3000 Smart Pressure Transmitters for applications where flow, liquid level, gauge pressure, absolute pressure, and even vacuum must be precisely measured and controlled.