A primary differential pressure producing device having a cone section approach to a throat and a longer cone discharge section. Used for high volume flow at low pressure loss.
A tube designed to measure the rate of flow of fluids. It consists of a tube having a constriction or throat at its midsection. The difference between the pressure measured at the inlet and at the throat is a function of the fluid velocity. Compare to Pitot tube.
A tube designed to measure the rate of flow of fluids. The instrument is frequently used in wind-tunnel work and as a speed indicator for aircraft.