Nozzles are divided into two categories: ISA 1932 nozzles and long radius nozzles.

ISA-1932 nozzles are suitable for measuring flow rates of gas, steam and liquid. In the context of ISO 5167, they offer high accuracy with relatively low permanent pressure losses. Weld-in nozzles are often used in power plant applications with high pressures and temperatures. The tapping can be designed as corner taps, annular taps, flange ring taps, or socket ring taps.

Long radius nozzles are used in similar applications as the ISA-1932 nozzles and are available in the same design options as noted above. One of the advantages they have is excellent resistance to abrasion. One disadvantage is poorer linearity.

Differential pressure instruments for flow measurement of gases, liquids and steam based on the international standard ISO 5167.