High-temperature explosion-proof vortex flowmeter, also known as turbine flowmeter or Karman vortex flowmeter, can be in the minus 20 degrees Celsius to 350 degrees Celsius operating temperature range. It is mainly used for the flow test of industrial pipeline medium fluid, such as gas, liquid and vapor. It is characterized by small pressure loss, large measuring range and high accuracy. It is hardly influenced by the flow density, pressure, temperature, annual and other parameters mentioned in the measurement conditions. At the same time, the side of the horizontal pipe installed, no matter what the total measurement of fluid, the sensor can be installed on the side of the horizontal pipe. It is characterized by the measurement of superheated steam, saturated steam, and shading liquid. If conditions allow good side loading, the temperature of the fluid has little effect on the amplifier.