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Absolute pressure / Gauge pressure / Differential pressure - Glossary - Pressure sensors

Absolute pressure / Gauge pressure / Differential pressure

Absolute pressure : Pressure determined with respect to absolute vacuum as zero
Gauge pressure : Pressure determined with respect to the atmospheric pressure as zero Pressure higher than the atmospheric pressure is called "positive pressure", and lower than it is called "vacuum pressure". Pressure ranging from vacuum pressure to positive pressure is called "compound pressure".
Differential pressure : Difference between two pressures

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