The cups the wind turing a dial attached to the instruments.
The anemometer counts the number of rotations,or,turns,which is used to calcubrate wind speed.
Anenmometer
An anemometer is a device used to measure wind speed.It is found in most weather stations.
A anemometer looks like a stick with cups that spin around when the wind hits the anemometer.
A anemometer was invented in 1450 and the inventor's name is Leon Battisto Alberti.
A anemometer is used for measuring wind speed and is a common weather station instrument.
Anemometer information