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As weather systems pass through your area, (highs rotate clockwise around the center; lows, counter clockwise) wind direction changes indicate the system's path and passage. Wind speed measures the movement of air from one system to another and at the same time the forward movement of the system. Air masses with different barometric pressure result in winds. As these move over an area, the air flows around them, and from one to another. The more intense the pressure difference between abutting air masses, the higher the wind speed which is both a result and an indicator of weather changes.

Downeaster Wind Indicators are built using the finest materials and allow you to know how the winds are affecting your house right at your location, not 50 miles away at the TV station. They give very accurate readings for their application. How they work is simple!

Wind Direction

The indicator's vane (which points into the direction from which the wind is blowing) is attached to a shaft and small magnet that pass by miniature reed switches, which open and close as the magnet affects them. When these switches are closed, the power passes through and lights the LED's on your indicator. This tells which direction the wind is coming from and how it is affecting your location.

Wind Speed

The wind blows the three-cup assembly as fast as the wind can spin it. The cup assembly is attached to a shaft, which supports a magnet. As the shaft turns the magnet, it passes nearby copper coils and generates electricity. The indicator measures the amount of electricity generated, which corresponds to the speed the cup assembly is rotating.

Our exciting Tru-Gust option may be incorporated with the wind speed of any of the above units. Tru-gust may also be added as an add-on accessory to any existing Downeaster wind speed unit.