The Pitot tube measures the difference between total pressure (facing the flow) and static pressure. This difference is proportional to the square of the velocity and, consequently, to the volumetric flow rate. The averaging model has multiple sampling ports along the whole cross section of the pipe, therefore producing a measurement averaged over the complete profile rather than at a single point.

A traditional Pitot tube measures velocity at a single point of the cross section. As a result, it is prone to error when the flow profile is not uniform. An averaging Pitot tube, by contrast, has multiple ports distributed across the entire cross section and produces an averaged differential pressure. Thanks to this approach, the measurement is far more accurate and requires shorter straight runs.

It is suitable for clean liquids, gases, air, saturated and superheated steam, nitrogen, hydrocarbons and seawater. It can also be used with high-temperature dusty gases, thanks to the version with an automatic purge system. It is not recommended, however, for fluids with a high content of suspended solids, which could clog the sampling ports.

Above DN 300, solutions such as magnetic or Coriolis meters become very expensive or technically impractical. The averaging Pitot tube, by contrast, covers diameters up to DN 2000 and beyond with contained installation and maintenance costs. Thanks to its simple construction, it requires neither pipe cutting nor external impulse lines.

Yes. The retractable (hot-tap) version allows the sensor to be installed and removed without interrupting the process and without shutting down the plant. This makes it the preferred solution for retrofits on existing pipework, especially in plants that cannot afford production downtime.

The DP transmitter paired with the Pitot tube supports HART 7, PROFIBUS PA, Foundation Fieldbus and a 4–20 mA output. Versions with a Bluetooth display are also available for remote configuration and verification, including in areas that are difficult to access.