Sensors & Measurement
Absolute pressure
Pressure measured relative to a perfect vacuum.
IN ONE SENTENCE
Zero absolute pressure means no pressure at all.
In normal English
Absolute sensors include atmospheric pressure in their reading, so they are useful where changes in barometric pressure should not alter the reference.
Why would I use it?
Use it for vacuum measurement, barometric applications and processes needing a fixed physical reference.
THINK OF IT LIKE…
Measuring pressure from absolute zero rather than from today's atmosphere.
Related terms
gauge pressure, vacuum, barometric
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