An anemometer measures wind speed. Indoors, an anemometer measures wind speed, wind velocity, or air flow. Anemometers are used in industries such as HVAC, construction, marine, wind power, and energy, including Hot Wire anemometers, thermal anemometers, pitot tube anemometers, cup anemometers, rotary vane anemometers, and hooded vane anemometers.