At the end of this lesson, you will be able to identify and describe the basic operation of various direct and indirect flow measurement devices. • Describe the following types of flow measuring devices, or flowmeters: – Mass flowmeters – Velocity based flowmeters – Variable area flowmeters – Pressure based flowmeters • Explain how a Coriolis flowmeter and a thermal flowmeter determine mass flowrate • Describe the operation of the following velocity based flowmeters: – Turbine flowmeter – Vortex flowmeter – Magnetic flowmeter – Ultrasonic flowmeter – Optical flowmeter • Explain how a rotameter uses variable flow area to determine flowrate • Explain how differential pressure can indirectly indicate flowrate • Describe the following methods for producing a differential pressure commonly used in flow measuring instruments: – Orifice plates – Venturi tubes – Flow nozzles – Pitot tubes • Describe the difference between and give examples of concentric and non-concentric orifice plates
