Artwork: How a simple reed-switch anemometer works. You can see it's divided into three main parts: the vane on top (blue), which indicates the wind direction; the rotating cups (red); and the stationary housing that you hold underneath (green). In the red cup section, there's a magnet built into one side (yellow).
Also asked, how is an anemometer used to measure wind speed?
The arms are attached to a vertical rod. As the wind blows, the cups rotate, making the rod spin. The stronger the wind blows, the faster the rod spins. The anemometer counts the number of rotations, or turns, which is used to calculate wind speed.
What is the unit of measurement for an anemometer?
Vane anemometers are the best choice for measuring wind speed. Many have user selectable units of measure: ft/min, m/s, MPH, km/h and knots to accommodate a wide variety of applications. A thermoanemometer is any hot wire or vane anemometer having the added feature of air temperature measurement.
How do you measure the wind speed and direction?
Wind speed and wind direction can be measured with a variety of tools. The most common, included with complete home weather stations, is the anemometer, which typically consists of a rotating vane to measure direction and a shaft with cups attached that spins with the wind to measure its speed.