Pressure Sensors Flashcards
It is the force exerted by gases and liquids due to their weight
Pressure
pressure formula
Force/Area
defined as the mass per unit
volume of a material.
Density
defined as the weight per
unit volume of a material.
Specific weight
It is defined as the density
of a material divided by the
density of water or it can be
defined as the specific
weight of the material
divided by the specific
weight of water at a
specified temperature.
Specific gravity
the pressure of fluids or
gases that are stationary or
not in motion.
Static pressure
the pressure exerted by a
fluid or gas when it impacts
on a surface or an object
due to its motion or flow.
Dynamic pressure
(total pressure) is the sum
of the static and dynamic
pressures on a surface or
object.
Impact pressure
Which is zero pressure or
lack of pressure, as would
be experienced in outer
space.
Total vacuum
Is a pressure measurement made between total vacuum and normal atmospheric pressure (14.7 psi).
Vacuum
Is the pressure on the earth’s surface due to the weight of the gases in the earth’s atmosphere and is normally expressed at sea level as 14.7 psi
or 101.36 kPa.
Atmospheric pressure
is the pressure measured with
respect to a vacuum.
Absolute pressure
is the pressure measured with
respect to atmospheric pressure.
Gauge pressure
is the pressure measured with respect to another pressure and is expressed as the difference between the two values. This would represent two points in a pressure or flow system
Differential pressure
is the pressure in a liquid. The pressure increases as
the depth in a liquid increases. This increase is due to
the weight of the fluid above the measurement point.
Hydrostatic pressure