The discussion below summarizes the main types of pressure sensor that are in
use. This discussion is primarily concerned only with the measurement of static pressure,
because the measurement of dynamic pressure is a very specialized area that
is not of general interest. In general, dynamic pressure measurement requires special
instruments, although modified versions of diaphragm-type sensors can also be used if
they contain a suitable displacement sensor (usually either a piezoelectric crystal or a
capacitive element).