Note that in this equation, the pressure term may be gauge pressure or absolute pressure, depending on the design of the container and whether it is open to the ambient air or sealed without air. ==Practical uses for pressure head== Fluid flow is measured with a wide variety of instruments. The venturi meter in the diagram on the left shows two co...
A combination of pitot and static pressure tubes forming part of airspeed indicator installation.
The pump head exerted by atmospheric pressure or any additional pressure that might be in the vessel.
head (def. 32).