LUGB series  vortex flowmeter is a  new type of flowmeter with international advanced level based on the principle of Carmen vortex street. It is an international advanced level flowmeter developed by using the technology of vortex sensor and microcontroller. It belongs to the fluid vibration flowmeter. Because of its unique advantages, it can be used to measure the flow of gas, liquid and steam. It is widely used in petroleum, chemical, metallurgical, thermal, textile, paper-making, power, environmental protection and municipal construction industries.

The vortex in vortex downstream non symmetrically arranged. A vortex frequency is f, the average speed of the measured medium to flow into V, the bluff body flow facing surface width is D, the body size is D, according to the Kaman principle of the vortex, the following formula:f=StV/d