eFunda: Catagorization to Flowmeters
 Flowmeters: Catagorization
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Since flowmeters are integrated instruments that measure different flow quantities by different technologies, it is difficult to categorize them by one parameter. Typically flowmeters are referenced by:

Flowmeter By Technology Employed

 Technology Instrument Measure Result 1. Coriolis Miscellaneous Acceleration Mass 2. Differential Pressure Elbow Pressure Pressure Volume 3. Flow Nozzle Pressure Pressure Volume 4. Orifice Pressure Pressure Volume 5. Pitot Tube Pressure Pressure Volume 6. Pitot Tube (Averaging) Pressure Pressure Volume 7. Venturi Pressure Pressure Volume 8. Wedge Pressure Pressure Volume 9. Magnetic Electronic Electromagnetic Field Velocity 10. Positive Displacement Nutating Disc Mechanical Volume Volume 11. Oscillating Piston Mechanical Volume Volume 12. Oval Gear Mechanical Volume Volume 13. Roots Mechanical Volume Volume 14. Target Mechanical Force Velocity 15. Thermal Miscellaneous Heat Transfer Velocity 16. Turbine Mechanical Volume Volume 17. Ultrasonic Doppler Electronic Acoustic Waves Velocity 18. Transit Time Electronic Acoustic Waves Velocity 19. Variable Area Movable Vane Pressure Pressure Volume 20. Rotameter Pressure Pressure Volume 21. Weir, Flume Pressure Pressure Volume 22. Vortex Mechanical Frequency Velocity

Flowmeter By Instrumentation Employed

Flowmeters may be categorized by the instrumentation architecture.

 Instrument Technology Measure Result 1. Electronic Magnetic Electromagnetic Field Velocity 2. Ultrasonic Doppler Acoustic Waves Velocity 3. Transit Time Acoustic Waves Velocity 4. Mechanical Positive Displacement Nutating Disc Volume Volume 5. Oscillating Piston Volume Volume 6. Oval Gear Volume Volume 7. Roots Volume Volume 8. Target Force Velocity 9. Turbine Volume Volume 10. Vortex Frequency Velocity 11. Miscellaneous Coriolis Acceleration Mass 12. Thermal Heat Transfer Velocity 13. Pressure Differential Pressure Elbow Pressure Volume 14. Flow Nozzle Pressure Volume 15. Orifice Pressure Volume 16. Pitot Tube Pressure Volume 17. Pitot Tube (Averaging) Pressure Volume 18. Venturi Pressure Volume 19. Wedge Pressure Volume 20. Variable Area Movable Vane Pressure Volume 21. Rotameter Pressure Volume 22. Weir, Flume Pressure Volume

Flowmeter By Physical Quantity Measured

Another way to categorized flowmeters is to base on the physical quantity that the flowmeter measures.

 Measure Result Technology Instrument 1. Acceleration Mass Coriolis Miscellaneous 2. Acoustic Waves Velocity Ultrasonic Doppler Electronic 3. Velocity Transit Time Electronic 4. Electromagnetic Field Velocity Magnetic Electronic 5. Force Velocity Target Mechanical 6. Frequency Velocity Vortex Mechanical 7. Heat Transfer Velocity Thermal Miscellaneous 8. Pressure Volume Differential Pressure Elbow Pressure 9. Volume Flow Nozzle Pressure 10. Volume Orifice Pressure 11. Volume Pitot Tube Pressure 12. Volume Pitot Tube (Averaging) Pressure 13. Volume Venturi Pressure 14. Volume Wedge Pressure 15. Volume Variable Area Movable Vane Pressure 16. Volume Rotameter Pressure 17. Volume Weir, Flume Pressure 18. Volume Volume Positive Displacement Nutating Disc Mechanical 19. Volume Oscillating Piston Mechanical 20. Volume Oval Gear Mechanical 21. Volume Roots Mechanical 22. Volume Turbine Mechanical

Flowmeter By Flow Quantity Displayed
Regardless of the actual physical quantity measured, the goal of a typical flowmeter is to give information about one of the following values:
• Volume flow rate (Volume)
• Mass flow rate (Mass)
• Flow velocity (Velocity)
Flowmeters can therefore be categorized accordingly (Volume, Mass, or Velocity).

 Result Technology Measure Instrument 1. Mass Coriolis Acceleration Miscellaneous 2. Velocity Magnetic Electromagnetic Field Electronic 3. Target Force Mechanical 4. Thermal Heat Transfer Miscellaneous 5. Ultrasonic Doppler Acoustic Waves Electronic 6. Transit Time Acoustic Waves Electronic 7. Vortex Frequency Mechanical 8. Volume Differential Pressure Elbow Pressure Pressure 9. Flow Nozzle Pressure Pressure 10. Orifice Pressure Pressure 11. Pitot Tube Pressure Pressure 12. Pitot Tube (Averaging) Pressure Pressure 13. Venturi Pressure Pressure 14. Wedge Pressure Pressure 15. Positive Displacement Nutating Disc Volume Mechanical 16. Oscillating Piston Volume Mechanical 17. Oval Gear Volume Mechanical 18. Roots Volume Mechanical 19. Turbine Volume Mechanical 20. Variable Area Movable Vane Pressure Pressure 21. Rotameter Pressure Pressure 22. Weir, Flume Pressure Pressure