# wind gauge

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## wind gauge

1. another name for anemometer
2. Music a device for measuring the wind pressure in the bellows of an organ

## Wind Gauge

an instrument used to determine the direction and velocity of the wind.

Wind direction (see Figure 1) is determined from the position of a pointer consisting of two vanes (1) arranged at an angle and a counterweight (2). The pointer is attached to a metal tube (3) and rotates freely on a steel rod. Wind causes the pointer to orient itself in such a way that the counterweight faces the direction of the oncoming wind. Mounted on the rod is a sleeve (4) with pegs pointing to the principal points of the compass. The direction of the wind is determined from the position of the counterweight relative to the pegs.

Figure 1

The velocity of the wind is measured with the aid of a metal plate or wooden board (6) that hangs plumb from a horizontal pin (5). The plate rotates about the vertical axis together with the pointer; wind causes it to be oriented perpendicular to the flow of air. Deviation of the plate from the plumb position is determined by the force, or speed, of the wind; the deviation angle can be read from the arc (7).

Wind gauges are mounted on masts 10–12 m above ground level.

### REFERENCE

Sternzat, M. S. Meteorologicheskie pribory i nabliudeniia. Leningrad, 1968.
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