Definitions for "Absolute Pressure"
Keywords:  psia, gauge, gage, zero, vacuum
Pressure above zero pressure; the sum of the gauge and atmospheric pressures.
the pressure above a complete vacuum, so that absolute pressures can only have positive values. The absolute pressure of one standard atmosphere at sea level is 14.7 Ib/in2 absolute, or 14.7 psia.
is the arithmetic sum of gauge and atmospheric pressures. It must be used in all calculations involving the basic gas laws.
Absolute temperature Absolute viscosity (Dynamic)