Best Wind Anemometers: You might think the wind anemometer is a very sophisticated instrument, but it is not. Nowadays there are small anemometers that you can take to the mountain, and that you connect to your mobile to do the readings. Yes, you’ve heard it well, thanks to advances in technology, you can find very cheap, small-sized anemometers that connect to your smartphone. The most common are casserole anemometers.
Best Wind Anemometers
Buy the anemometer that best suits your needs, and you can know precisely the wind speed. The anemometer is a handy instrument when doing mountain sports to avoid dangerous situations.
Buy your wind anemometer here
We have the best wind anemometers you can find in the market. You can also buy the new cup anemometer for a mobile phone. The cup anemometer for a smartphone is very easy to use so you have to download the application on your mobile and you’re done!
This anemometer has no digital components to transfer data to the mobile. It works correctly with smartphones with magnetometers. 4 little magnets at the base of the cups interact with the intelligent device, which in turn translates the magnetic data into the wind speed using an algorithm. To use it, you have to bring the anemometer closer to the mobile with the application open. It is not necessary to place it in the headphone jack, although it is convenient since you will get more stability. It is also compact to carry in any mountain backpack.
What is an anemometer for?
The Anemometer is an instrument that is used to measure the wind speed and is one of the major parts of a weather station. Choosing an anemometer can be complicated. You can find a lot of types of anemometers, each with its unique style and functionality. To select the most appropriate, you must take into account certain factors and aspects. These are some of the most critical elements you need to buy your perfect anemometer.
Types of wind anemometers
First, you must decide what kind of anemometer you need and are willing to buy. Here are the most popular types of anemometers that can be very useful in the mountains.
Cup anemometers are the most common. A cup anemometer consists of 2, 3 or 4 cups that rotate on a vertical axis. The bowl turns when the wind blows, and an integrated sensor measures the rotation, which then becomes the reading of the wind speed.
- This type of anemometer does not need to point towards the source to detect the wind speed.
- Cup anemometers are highly reliable and resistant.
- The anemometer will sometimes have a very high starting speed.
- Low measurements are not studied very well.
- In turbulent conditions, cup anemometers can underestimate wind speeds.
- They can give bad readings due to the formation of ice.
Propeller anemometers have a mechanism similar to pan anemometers, but the sensors of a propeller anemometer are shaped like a windmill or turbine. Unlike pan anemometers, this type of anemometer must be parallel to the wind and rotate on a horizontal axis.
- They work in environments with pollution and are more resistant and durable than other anemometers such as a hot wire.
- Propeller anemometers can handle high wind speeds.
- To obtain the best result or accurate readings, the unit must be pointing toward the source.
- Anemometers with smaller propellers usually have higher starting speeds.
- As with pan anemometers, the rotating parts of the propeller anemometers also wear out with use over time.
Hotwire anemometers work with a completely different mechanism. In a hot wire anemometer, a thin wire inside the equipment is electrically heated, which cools when the wind flows. By knowing the current required to maintain the temperature of the fence, the hot wire anemometer calculates the heat loss and gives us the value of the wind speed.
- It offers a low initial threshold.
- There are no rotating parts, so this equipment lasts longer compared to the bowl anemometer or the propeller anemometer.
- It provides high precision reading, with quick response.
- The sensor is smaller in size.
- Large particles of air can damage the device, so this type of anemometer is not recommended for dirty environments.
- It is not appropriate for places with rapid fluctuations in temperature, as it would give erroneous readings.
Anemometers of Pitot tubes
Pitot tube anemometers measure the wind pressure to obtain the wind speed reading. This type of anemometer has two cells: one of the machines has a central hole that measures the dynamic pressure and a lateral hole that measures the static pressure, while the other tube only has a side hole. The air velocity is calculated thanks to the pressure difference with the Bernoulli equation.
- It can usually handle very high temperatures and airspeed.
- Pitot tubes are tiny and can easily be inserted into the duct.
- They do not have rotating parts, so they do not wear quickly.
- Offers a quick response
- The equipment must be oriented towards the wind flow.
- It is not supported for places with very fluctuating wind flow.
- It is not proper for areas with low airspeed.
Sonic anemometers are the most advanced. Ultrasonic sound waves are used by the sonic anemometer to measure the wind speed. The wind speed is regulated depending on the time of flight taken by sonic pulses between the transducers.
- You can capture measurements with excellent temporal resolutions of 20Hz or more.
- Resistant to the weather and unlikely to fail due to the effect of icing.
- They have no rotating parts, so this type of anemometer has greater durability than the cup anemometer and the propeller anemometer.
- Very rare and more valuable than other types of anemometers.
- They are usually fixed and not portable
- If a bird perches on the sonic anemometer, it can cause problems, resulting in abnormally high false wind gusts.
When evaluating the quality of an anemometer, the accuracy rating is the most critical factor to consider. The degree of accuracy of the unit means how accurate the reading provided by a particular anemometer is. For best results, always look for an anemometer that has an efficiency of ± 0 to ± 5%.
Wind speed and response
Wind speed is an essential aspect that you should consider. A real anemometer will usually have a wind speed report that ranges from 0 to 100 mph or more. The answers provided by the anemometer should be quick. The wind speed can usually fluctuate rapidly, so the team should be able to give a quick and updated response to the reading of the wind speed.
Size and Design
The different types of anemometers come with very different sizes and designs. For example, you can find propeller anemometers with the size of the propeller more or less extensive and some pan anemometers with more or fewer cups. Propeller anemometers with huge propellers are better than the smallest ones as mentioned above. In the same way, the anemometer with 3 cups is more precise than the one with 4 cups. The hot wire anemometer with longer cables is better, since the more excellent the location of the wind sensor, the more accurate the reading will be. These characteristics are important when choosing an anemometer.
The material and the manufacture of the anemometer are necessary factors since they directly influence its durability. The anemometer will be continuously exposed to the outdoor environment and will face the most stringent weather conditions, so be sure to buy a significant and robust anemometer that can withstand the worst climates.
In general, pan anemometers and propeller anemometers cannot withstand ice, and fail due to the effect of ice, although you can buy high-end pan anemometers that can work even in freezing weather. Once again, thanks to advances in technology, there are pan anemometers and helical anemometers with shallow friction parts, which last much longer than normal ones.
The color of the anemometer is important for places that are often affected by ice. The anemometers are available in two colors, black and white. Both types are susceptible to ice formation, but black anemometers thaw faster than whites.
There are many other features that you can look at, such as electrical and mechanical components, accessibility for cleaning and maintenance, and digital pulse data that help prevent electrical interference from various sources, such as radio transmission.
Keeping an anemometer is not a simple task, and it may take some time. Although the expensive units are the best, there are also some low-end anemometers with high functionality and durability. It does not matter what your budget is. If you consider all the circumstances specified above, you can easily find the most suitable one. Take the necessary time and select the best one.