What are the instruments for measuring wind speed?

1. Impeller anemometer: It is an instrument used to measure air velocity. Impeller anemometer generally consists of impeller and counting mechanism. According to its counting mechanism, impeller anemometer can be divided into two types: self-recording impeller anemometer and non-self-recording impeller anemometer. Generally, the measuring range of vane anemometer is 0.5 to 10 meter per second;

2. Hot-ball anemometer: Wind speed is measured by calorimetry principle. The sensitive element for measuring wind speed is a spherical element with a diameter of about 0.8 mm, which is a portable, intelligent and multifunctional basic instrument for measuring low wind speed.

3. Hot-wire anemometer: It is a kind of velocimeter that converts velocity signal into electrical signal, and can also measure fluid temperature or density. The principle is to place a thin wire with electric heating in the airflow. The heat dissipation of the hot wire in the airflow is related to the flow rate, which leads to the temperature change and resistance change of the hot wire, and the flow signal is converted into an electrical signal.