LWZ-900/99 type intelligence the venturi vortex flowmeter is the American microchip company microprocessor and modern digital filtering technique is developed and Dang a with the international advanced level of fluid vibration type flowmeter. It has many advantages, such as low power consumption, high accuracy, wide range, low power consumption, low pressure loss, strong anti disturbance performance, simple operation, and so on, which is mainly used in the measurement of gas, gas, ammonia, compressed air, etc..