![]() The vane orientation is typically indicated with a potentiometer, a device that changes electrical resistance when the shaft rotates a wiper on a resistance band. Wind VanesĪ wind vane for reading wind direction may be integrated with the 3-cup anemometer. Anemometer and wind vane designs should avoid horizontal surfaces that can accumulate snow and allow water to puddle and freeze. When evaluating 3-cup anemometers and vanes, look for wide drip skirts to shed precipitation. If properly designed, 3-cup anemometers can contribute to a very low-power system.įreezing can be a problem for any anemometer. The speed calculation burden falls to the attached digital device. They are also simple to use and easy to troubleshoot.ģ-cup anemometers are typically electrically passive, using a reed switch to indicate anemometer rotation. This means they respond well to rapid changes in wind direction.ĭue to their mechanical simplicity, these 3-cup designs can be very rugged. The design is inherently omni-directional. For general meteorological use, 3-cup wind sensors mechanically provide accurate wind speed measurements. They are typically less responsive to rapid changes in wind speed when compared to ultrasonic devices this can be good or bad, depending on the application and the characteristics of the instruments. 3-cup anemometers measure wind speed by the speed of the rotating cups. The iconic design usually consists of 3 small cups that are connected to a central axis. 3-Cup AnemometerĪ cup anemometer is the most common anemometer on the market. ![]() For meteorological applications, there are three basic types: 3-cup, helical, and ultrasonic. ![]() There is a wide variety of methods and instruments available for measuring wind speed and direction, so it can be overwhelming when deciding which one is right for your application. Ultrasonic – Which Wind Sensor is Right for You?
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