Which flow measurement device uses precision fitted rotors, gears, or vanes?

Positive displacement flow meters utilize precision-fitted rotors, gears, or vanes to measure the flow of liquids. These devices work by capturing a specific volume of fluid with each rotation or movement of the internal components. As the liquid flows through the meter, the mechanical parts rotate and displace a known volume, allowing the meter to count the rotations and calculate the flow rate based on the volume displaced.

This mechanism is highly accurate for measuring volumetric flow and is particularly effective for liquids with varying viscosities. The design of positive displacement meters ensures that the flow measurement is not influenced by changes in pressure or temperature, making them reliable for a wide range of applications. Their ability to handle high-viscosity fluids and provide consistent performance over time is a significant advantage in many industrial settings.