Swirl flowmeters, often referred to as swirl meters or precision vortex flowmeters. The swirl flow meter operates on the principle of imparting angular momentum to the flowing fluid through a set of stationary blades or swirl vanes. As the fluid passes through these vanes, it acquires a swirling motion.
These Swirls are detected by a sensor, and the frequency of their formation is directly proportional to the fluid velocity. By measuring this frequency, the
swirl flow meter accurately calculates the flow rate of the fluid.