The vortex flowmeter is a new type of flowmeter which is based on the Carmen vortex principle to measure the fluid flow in the closed pipeline. Because of its good medium adaptability, it can directly measure the volume flow of steam, air, gas, water and liquid without temperature and pressure compensation. Equipped with temperature and pressure sensors, it can measure the volume flow and mass flow of standard condition. It is an ideal alternative product of throttling flowmeter.