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A Reed Switch Anemometer

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  • 1 College of Forest Resources, University of Washington, Seattle 98105
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Abstract

An anemometer housing design is described which utilizes readily available components. The unique feature of the design is the use of a magnetically activated reed switch set in an iron epoxy housing to provide indication of wind speed and yet maintain a low-threshold starting speed. The reed switch provides a positive off-on switch and requires only two wires. The response of this reed-switch anemometer is similar to that of photo-chopper anemometers having a starting speed of 12 cm sec−1 and a sensitivity of 0.026 rpm per msec−1.

Abstract

An anemometer housing design is described which utilizes readily available components. The unique feature of the design is the use of a magnetically activated reed switch set in an iron epoxy housing to provide indication of wind speed and yet maintain a low-threshold starting speed. The reed switch provides a positive off-on switch and requires only two wires. The response of this reed-switch anemometer is similar to that of photo-chopper anemometers having a starting speed of 12 cm sec−1 and a sensitivity of 0.026 rpm per msec−1.

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