Thermal Mass Flowmeter

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Factors that Impact Accuracy, Conditioning and Flow Profile of a Thermal Mass Flowmeter

October 24, 2018

The velocity profile is used to determine the flow rate of fluid flowing within a pipe. If the fully developed profile changes, the accuracy level of a thermal mass flowmeter decreases. Keep on reading to know the major application factors that affect the meter’s accuracy require consideration. One of these includes the upstream straight run distance, which changes the flow profile. In many cases, flow conditioning, a process of synthetically creating a more uniform flow profile, is necessary when upstream straight run lengths are not available to achieve a sufficiently developed flow profile. Thermal mass flowmeters measure the mass flow rate of gases and liquids directly. Volumetric measurements are affected by all ambient and process conditions that influence unit volume or indirectly affect pressure drop, while mass flow measurement is unaffected by changes in viscosity, density, temperature or pressure. Thermal mass flowmeter is often used in monitoring or controlling mass-re...