This variant of flow measurement technology is based on the dynamic pressure principle. These rod-shaped flow measuring instruments have several pressure tapping openings facing towards and away from the direction of flow and are installed vertically in the pipeline. This measurement procedure allows an accurate profile for velocity in the interior of pipes, and thus an exact flow measurement. The flow creates a dynamic pressure on the front, while the pressure value remains constant on the back. The resulting pressure difference serves as the basis for calculating the mass and volume flow. For monitoring in a remote control room, a differential pressure transmitter can be connected to the pitot tube to generate a constant signal proportional to the flow. Differential pressure gauges or differential pressure switches are used for the local display of the flow.