Instruments to Measure Wind
Different anemometers are quite expensive and not as effective if hand-held because wind motion is affected by friction with the Earth's surface. You need to put these instruments up as high as possible - preferably 10 m (33 ft) and away from buildings.

Different Types of Instruments
A cup anemometer has metal cups which rotate in the wind. A swinging-arm anemometer records the force of the wind against a single ball or plate. With a ventimeter wind blows into a hole at the bottom of a tube and raises a plate up it. A Dwyer wind meter similarly uses a ball. You can easily make a simple anemometer.