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Measurement
An anemometer is one of the tools used to measure wind speed. A device consisting of a vertical pillar and 4 concave cups, the anemometer captures the horizontal movement of air particles (wind speed).

Another tool used to measure wind velocity includes a GPS combined with pilot tube. A fluid flow velocity tool, the pilot tube is primarily used to determine the air velocity of an aircraft.

An anemometer is an instrument used to measure the speed or velocity of air (gases) either in a contained flow, such as airflow in a duct, or in unconfined flows, such as atmospheric wind. To determine the air velocity, anemometers detect change in some physical property of the fluid or the effect of the fluid on a mechanical device inserted into the flow.

The hot wire anemometer is the most popular kind of constant-temperature devices. It consists of an electrically heated, fine-wire element (0.00016 inch in diameter and 0.05 inch long) supported by needles at its ends. While hot wire are best suited for clean gases at low velocities, venturi meters can also be considered for some liquid (including slurry) flow applications.