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The phrase "absolute pressure" is correct and usable in written English.
It is typically used in scientific and engineering contexts to refer to the total pressure exerted on a system, including atmospheric pressure.
Example: "The absolute pressure in the chamber must be maintained at a constant level to ensure accurate measurements."
Alternatives: "total pressure" or "overall pressure".
Dictionary
absolute pressure
noun
Total pressure in a fluid equivalent to the sum of the gage and the atmospheric pressures.
Exact(60)
The seismic bellows was tested with cyclic pressurization of the interlayer space to 2 bars absolute pressure for 5 cycles.
An absolute pressure of zero corresponds to empty space or a complete vacuum.
The absolute pressure exerted by the air within the tire, including atmospheric pressure, is 45 pounds per square inch.
Absolute pressure of a gas or liquid is the total pressure it exerts, including the effect of atmospheric pressure.
At the depth of a diver, the absolute pressure, which is approximately one additional atmosphere for each 10-metre increment of depth, is one factor.
If the lower of the pressures is the pressure of the atmosphere, the total, or absolute, pressure is the sum of the gauge and atmospheric pressures.
Typical sensors include the following: mass airflow, exhaust oxygen, engine revolutions per minute, manifold absolute pressure, barometric pressure, coolant temperature, throttle position, knock, vehicle speed, air-conditioning load, power steering load, crankshaft position, and camshaft position.
b TC3-7 absolutelute pressure.
The gas outlet absolute pressure was 1.5 bar.
Absolute pressure gauges detect a slow-slip event near the Hikurangi trench.
We used a pressure regulator to keep Pup constant (0.20 to 1.2 MPa in absolute pressure).
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CEO of Professional Science Editing for Scientists @ prosciediting.com