Vintage Anemometer Wind Indicator Device For Measure Wind Velocity 1970 USSR The condition is good, working. An anemometer is a device used to measure the speed or velocity of the wind. It usually consists of a vertical rod with horizontal arms or cups, which are free to rotate around the rod's axis. The wind causes the cups to rotate, and the rate of rotation is proportional to the wind speed. There are several types of anemometers: cup anemometers, vane anemometers, hot wire anemometers, and sonic anemometers. Cup and vane anemometers are the most commonly used for measuring wind speed in meteorology and environmental monitoring. Anemometers are commonly used in weather stations, on aircraft, and in wind turbines to measure the speed of the wind. The information provided by an anemometer is important for a variety of applications, such as predicting weather patterns, determining optimal wind turbine placement, and ensuring the safety of aircraft operations. ------------------------------------------------------------------------------------------------------------ We send worldwide by registered airmail for free. Check our other lots for combined shipping. GOOD LUCK!