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Ultrasonic wind sensors vs cup mechnical anemometers?

At present, there are two types of equipment for monitoring wind speed and wind direction: one is an anemometer with a mechanical structure, and the other is an anemometer with ultrasonic measurement. These two types of wind speed and direction sensors are two common devices in daily life. What are the similarities and differences between the two, whether there is an accuracy problem, and how to choose.

AMC728 anemometer 500AM706E 500
The mechanical wind speed and direction sensor is not one, divided into wind speed sensor and wind direction sensor:

Ultrasonic and mechanical sensors measure the wind in different ways. Mechanical sensors use moving parts ,The “cups” for speed and “vane” for vectoral change measurement physically move with changes in the wind and give accurate readings of speed and direction. Ultrasonic sensors or “sonics” operate without moving parts. On a typical sonic anemometer, a transducer sends a pulse of ultrasonic sound from the ‘North’ facing side of the sensor. A microprocessor measures t time it takes to travel to the ‘South’ transducer. The wind speed is calculated from the time it takes the ultrasound to travel to the opposite transducer. Measurement times are affected by the wind speed and direction blowing along the line between the transducers. Without moving parts, measurement is immediate and precise.

When averaged over time, ultrasonic and mechanical measurement accuracies are comparable. Both report the level of accuracy according to sensor’s published specifications. Although data is accurate when averaged, mechanical sensors will not always reflect turbulence (rapid changes in wind speed and direction) and gusts due to the simple physical limitations of its moving parts. A mechanical sensor is affected by the start-up torque of the moving cup and vane. Observed differences occur in measured wind speed because of the time it takes a mechanical sensor to physically start up or register a change in wind direction. For example, if a storm blows through an area and the wind suddenly changes direction, the sensor must slow, stop, and restart with the change in wind direction. It will take some seconds to register and report the change.

With the rapid development of the Internet of Things, the demand for the accuracy of monitoring meteorological elements is increasing. The use of ultrasonic wind speed and direction sensors can well overcome the inherent defects of mechanical wind speed and direction, so it can work normally all day and for a long time. In the future, the cost can be reduced, and it will be a strong substitute for mechanical anemometers.

Imarinex supply one stop marine anemometer solution ,

Mechnical wind speed and direction sensor :

WTF-B500  and WTF-B510

WTF B500 风速仪500 1wind direction sensor 500

Marinelite  Mi-9000P / Mi-9000S

Mi9000S AnemometerMI9000P Anemometer

NINGLU  AM-706

AM706 500 1

Ultrasonic Wind Speed and direction anemometer .

ONWA   KW-360 and KW-360mini

onwa imarinex ultrasonic wind sensor kw-360KW 360 mini ultrasonic wind sensor 500 1

CNFT/ JUNLU AM-728

AMC728 anemometer 500

 

 

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