What instrument is used to measure wind velocity?

✅Explanation: An anemometer is the instrument used to measure wind velocity or wind speed. It typically consists of cups or blades that rotate when the wind blows, and the speed of rotation is used to determine the wind speed.

📌Other Options Explanations:
-Wind vane: A wind vane is a device that indicates the direction from which the wind is blowing.
-Pyrheliometer: A pyrheliometer is a device that is used to measure the direct irradiance of solar radiation.
-Pyranometer: A pyranometer is a device that is used to measure the total irradiance of solar radiation, including both direct and indirect radiation.

🔑Key Points:

• Anemometer:
-Anemometer, a device for measuring the speed of airflow in the atmosphere, in wind tunnels, and in other gas-flow applications.
-Most widely used for wind-speed measurements is the revolving cup electric anemometer, in which the revolving cups drive an electric generator.
-The output of the generator operates an electric meter that is calibrated in wind speed.
-The useful range of this device is approximately from 5 to 100 knots.
-A propeller may also be used to drive the electric generator, as in the propeller anemometer. In another type of wind-driven unit, revolving vanes operate a counter, the revolutions being timed by a stopwatch and converted to airspeed.
-This device is especially suited for the measurement of low airspeeds.