The advantage of this type of meter lies in the higher recovery coefficient, and therefore lower permanent pressure loss, compared to other types of differential pressure meters. They are devices composed of a conical inlet with a decreasing cross-section (Convergent), a cylindrical throat, and a conical outlet with an increasing cross-section (Divergent). Depending on the construction method, they are referred to as
- Machined
- Welded
- Cast.
