Pressure measured in a complete vacuum.
pressure that will register on a pressure gauge, plus atmospheric pressure present, e.g., a gauge pressure of 68.5 pounds per square inch (psi) at (68.5 plus 14.7 equals 83.2); in the United States, absolute pressure is expressed as pounds per square inch absolute, or as psi
The total pressure measured from absolute zero (i.e. from an absolute vacuum).
The true total pressure inside an enclosed vapor system, that is, the gage reading plus standard atmospheric pressure of 14.7 psi.
The pressure above zero, i.e., the sum of atmospheric and gauge pressure. In vacuum related work it is usually expressed in millimeters of mercury (mm-Hg).
Gauge pressure plus 14.7 psi (1 bar)
pressure measured relative to absolute zero pressure (perfect vacuum). The output of the absolute sensor will change as a result of barometric pressure change. Thus it can be used as a barometer.
the sum of atmospheric and gage pressures.