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Position of edge of float against scale gives flowrate reading.

Float at large end of tube indicates maximum flowrate

Position of edge of float against scale gives flowrate reading.

Tapered metering tube

Metering float is freely suspended in process fluid.

Float at narrow end of tube indicates minimum flowrate

Float at large end of tube indicates maximum flowrate

Tapered metering tube

Metering float is freely suspended in process fluid.

Float at narrow end of tube indicates minimum flowrate

Rotameter-type flow meter. (Courtesy of Fischer & Porter Co.).

Rotameter-type flow meter. (Courtesy of Fischer & Porter Co.).

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