How does a metal tube rotameter (variable area meter) work?
Metal-tube rotameters: float position in a tapered tube varies with flow, read magnetically. No power needed, ±1%~±2.5% FS, ideal for opaque/hazardous media small flows.
A metal tube rotameter measures flow by the position of a float in a tapered metal tube: higher flow lifts the float higher. The float position is read magnetically — no external scale — making it suitable for opaque liquids, high pressure and hazardous media. Simple, robust, no external power needed; typical accuracy ±1%~±2.5% FS, best for small-to-medium flows and local indication plus 4-20mA output.
Product Principles
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