Summarizing Gauge Pressure and Absolute Pressure

Summary

• Gauge pressure is the pressure relative to atmospheric pressure.
• Absolute pressure is the sum of gauge pressure and atmospheric pressure.
• Aneroid gauge measures pressure using a bellows-and-spring arrangement connected to the pointer of a calibrated scale.
• Open-tube manometers have U-shaped tubes and one end is always open. It is used to measure pressure.
• A mercury barometer is a device that measures atmospheric pressure.

Glossary

absolute pressure

the sum of gauge pressure and atmospheric pressure

diastolic pressure

the minimum blood pressure in the artery

gauge pressure

the pressure relative to atmospheric pressure

systolic pressure

the maximum blood pressure in the artery