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Anemometer is an instrument to measure wind speed, air flow filter will occur after a pressure difference, this pressure difference and the speed of airflow is proportional, the greater the wind speed, the greater the pressure difference, based on the correspondence between the two to calibrate the wind speed; there is another is similar to the fluid mechanics in the venturi, airflow impact to the force plate, the impact force and wind speed is proportional, based on the impact force to calibrate the wind speed.

The wind speed is measured with an anemometer. The following types of anemometers are commonly used:

(1)Rotating anemometer.

(2) Pressure anemometer: the application of wind pressure effect (wind pressure and wind speed squared proportional to) to measure wind speed.

(3) Thermal anemometer: the application of the heated object heat dissipation rate and the surrounding air flow rate related to the characteristics of the measurement of wind speed.

(4) Acoustic anemometer: the application of sound waves in the atmosphere to measure wind speed as a function of the speed of flow between the relationship between the wind speed.

The wind speed measurement error is large, which is critically formed by the hysteresis effect of the anemometer.

Anemometer is widely used for data collection in boilers, refrigeration, HVAC, ventilation ducts, environmental monitoring, nautical surveying, as well as in weather forecasting, field operations and fire departments. It can measure not only wind speed, but also wind temperature, wave height, wind level, wind volume and wind direction, etc. Multi-measurement unit conversion, wind speed measurement handle can be separated from the body for easy measurement.