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What is the difference between a Rotameter and a Flowmeter?
All rotameters are flowmeters, but not all flowmeters are rotameters.?
A rotameter measures flow rate in a closed tube - characterized by a tapered tube and some sort of float (typically a sphere). By definition, "rotameters" exclude any type of flow measurement device that does not employ a tube and float. Ironically, the element called the "float" does not actually float on the fluid being measured.?
A flowmeter, broadly defined, is any device that measures flow, and therefore includes all rotameters, plus any other devices designed for the task of measuring flow.