Absolute pressure

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A pressure reading that is zero-referenced against a perfect vacuum, using an absolute scale, so it is equal to gauge pressure plus atmospheric pressure.

Using manometers for measuring pressure

Gauge pressure
A pressure measurement that is zero-referenced against ambient air pressure, so it is equal to absolute pressure minus atmospheric pressure.

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About Fred Schenkelberg

I am the reliability expert at FMS Reliability, a reliability engineering and management consulting firm I founded in 2004. I left Hewlett Packard (HP)’s Reliability Team, where I helped create a culture of reliability across the corporation, to assist other organizations.

About Fred Schenkelberg

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