How to Check Rotameter Reading: A Simple Guide
Rotameters are widely used devices for measuring the flow rate of liquids and gases in various industrial and laboratory applications. They belong to the family of Variable Area Flowmeters, where the flow measurement principle relies on the change in the area through which the fluid passes. This simple yet reliable design offers an intuitive visual indication of flow rate, making rotameters a popular choice for engineers and technicians across many sectors.

At the heart of the rotameter is a tapered tube, typically made of glass or plastic, inside which a float rises or falls in response to the fluid flow. The position of this float correlates with the flow rate, and the reading is typically obtained by noting the float’s position against a calibrated scale on the tube.
#Rotameters
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