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A Rotameter is a device that measures the flow rate of liquid or gas in a closed tube. The brand name Rotameter was registered by the British company GEC Rotameter Co, in Crawley, and still exists, having been passed down through the acquisition chain: KDG. — “Rotameter - Wikipedia, the free encyclopedia”, en.wikipedia.org
Every sphereical rotameter I've ever purchased (many) is meant to be read at the center of the bead. The rotameter is a cool concept. A disadvantage that I couldn't put concisely is that the. — “Talk:Rotameter - Wikipedia, the free encyclopedia”, en.wikipedia.org
Also, to add reference of Rotameter in "Flow measurement" article. Rotameter should be moved into Flow measurement, also.--ML5 (talk) 15:04, 1 April 2008 (UTC). — “Talk:Variable area meter - Wikipedia, the free encyclopedia”, en.wikipedia.org