Which statement correctly describes the measurement principle of diaphragm meters vs turbine meters?

Which statement correctly describes the measurement principle of diaphragm meters vs turbine meters?

• A. Diaphragm meters measure volume via flexible diaphragms; turbine meters measure flow via turbine rotations.
• B. They operate on different physical principles; such as one measures volumes and the other measures flow.
• C. Diaphragm meters measure temperature; turbine meters measure pressure.
• D. Diaphragm meters measure density; turbine meters measure mass.

Answer: (A)