After this lesson, you will be able to describe the principles of fluid flow and understand how these principles provide multiple means for measuring flow rate in the process industry. • Define flow rate • Discuss the difference between volumetric and mass flow rate and list the common units used for measuring each • Describe the common types of flow measuring devices used in industrial processes • Using the concept of flow profiles, explain laminar and turbulent flow including a discussion of Reynolds Numbers • Explain how flow rate is affected by the following fluid properties: – Pressure – Density – Viscosity • Describe how detector position and flow disturbances can affect the accuracy of flow rate measurements