Help Center

Smart Anemometer

Wind measurement

Wind speed and direction are measured using four ultrasonic transducers. The Smart Anemometer measures the time between the moment a signal is emitted and the moment it is received, along two perpendicular directions. Wind speed along the N-S axis and W-E axis are then merged using trigonometric functions to obtain the real speed and the direction.

Displayed measures

Your dashboard displays:

(1) Current average wind speed and direction: measured over the last 5 minutes. The arrow indicates the wind direction and its size is proportional to the speed. Light grey dashes around the arrow indicate the dominant wind directions during the last hour.

An arrow pointing down means that the wind is blowing from the North (N = 0°). An arrow pointing to the left means that the wind is blowing from the East (E = 90°).

(2) Current wind gust (speed and direction), measured over the last 5 minutes.

(3) Maximum wind gust (speed and direction) for the day (since last midnight). Graphs let you navigate through historic average wind (speed and direction) and gusts (speed and direction).

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Setup and precaution

The Smart Anemometer should be placed at the highest point possible in order to get reliable measures and avoid turbulences created by obstacles surrounding it. It is recommended to place it about 1 m / 4 ft. above the top of your roof.

The Smart Anemometer should be placed horizontally and the arrow (there’s one at on the top and one in the bottom) must be pointing to the North. You can use your smartphone's compass app to check that when you install your Smart Anemometer at home.

To secure the Smart Anemometer, you may use a 1/4 inches standard camera mounting screw. You can buy a mount made for Netatmo Weather Station accessories from https://shop.netatmo.com/weather/accessories/mount-for-wind-gauge-rain-gauge.

It is important not to touch the four wind sensors in the middle space of the device. This could damage them or change the calibration of your Smart Anemometer.

The Smart Anemometer should not be twisted, use the four screws at the bottom to access the battery compartment.

Did you know?

According to WMO, the standard height at which wind is measured is 10 m. (33 ft.) and in a clear field. These are the conditions at which weather forecasts are calculated or airports make their measurements.

The reason is that as we are closer to the ground level, wind speed decreases considerably, and obstacles or irregularities on the ground, such as buildings or trees, create turbulences.

The graph below shows how wind speed (horizontal axis) decreases depending on the height (vertical axis, in meters) where it is measured.

In order to compensate the wind speed measured by your Smart Anemometer, you can enter the height at which you installed it on the calibration section of the settings menu.

 

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