The rotameter flowmeter is a variable area flow meter that works based on the float position measurement principle.
When the fluid flows through the flowmeter, the flow of the fluid impacts the rotor and generates a force on it, the magnitude of which varies with the flow rate.
The rotor rises or falls in the tapered tube until the force acting on the rotor is balanced with the weight of the rotor. At this time,
the position height of the rotor is proportional to the flow rate of the fluid, and the flow rate is displayed through the indicator.
