vane anemometer

vane anemometer

a. A small windmill-type instrument used to measure air velocity and to infer air volume movement. The vane anemometer has been the primary instrument for airflow measurement since the early 1900's. Hartman, 2
b. See also: anemometer
c. Consists of several light, flat vanes, usually eight in number, mounted on radial arms that are attached to a horizontal spindle. This rotor drives, through a suitable gear train, a counting mechanism that indicates the revolutions of the rotor. The indicating dial, usually graduated in feet of air, may be located either concentrically with the rotor, or in a plane at right angles to the plane of rotation. By observing the number of revolutions over a timed interval, the velocity of flow is found. The instrument is available in a number of forms to cover velocities ranging from 30 to 6,000 ft/min (9.1 to 1,830 m/min). Roberts, 1
Source: Dictionary of Mining, Mineral, and Related Terms

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