The Pitotstatic tube provides the difference between the total pressure in a flow and the static pressure as a measuring value. The tube is connected to a differential pressure gauge that indicates the dynamic pressure, this is a measure of the velocity of the flow.
To indicate the pressure, the following units are optionally available:
inclined tube manometer included in HM 170,
differential pressure manometer HM 170.53,
electronic pressure measurement HM 170.55 or
system for data acquisition HM 170.60.