An anemometer is a device used to measure different aspects of wind. Anemometers generally measure the speed of wind, but can also detect the velocity, and pressure in wind. The very first anemometer was invented by Leon Battista Alberti, an Italian art architect, in 1450. A number of advances to the primitive model have taken place, giving rise to the modern day anemometer.
Anemometers can be of two types, as mentioned eariler, namely velocity anemometers and pressure anemometers. Velocity anemometers can take two basic forms – a cup anemometer and a windmill anemometer. Apart from these, anemometer can be of a third kind – handheld anemometers, which work using either of the two forms.
Handheld anemometers are compact devices that can sometimes perform both as pressure and as velocity anemometers. Handheld anemometers use sound waves travelling with the wind to detect the speed of wind and other measures. The two fundamental tools that aid the device to give accurate readings are thermal energy and laser beams. Handheld anemomoeters found today can be used for measuring different aspects of wind such as pressure, velocity, temperature and humidity. Handheld anemomoeters work almost the same way as wind turbines. They are small metal cans containing an electricity generator and an axle sticking out from the top. On top of the axle are cups that catch the wind and spin the generators connected to an electric circuit. This in turn gives a reading on the display showing the speed of the wind. Preller anemometers work in almost the same way, except for the cups, which are replaced by fans or propellers.
Handheld anemometers can measure wind speed in mph, km/hr, or m/s, depending upon the requirement of the user. Most handheld models can measure wind temperature in Celcius, and in Fahrenheit. Handheld anemometers are easier to use than traditional anemometers and are not easily affected by changes in the wind direction of sudden strong wind blasts. Handheld anemometer is more personal and convenient to use and are benficial to people like engineers, climbers, sky divers and wind surfers.
Handheld anemometers are widely available in the marketplace. Many handheld versions of today offer additional features to make them more interesting. Some brands may offer an additional water-proof casing, while others may carry anemometers that can float on water. Other brands may offer anemometers with in-built Beufort Scales. Some are evwn testedfor breakability and resistance tostrong harsh winds.
There are a wide range of handheld anemometers offered by a number of brands. Some of the most popular brands are LaCrosse Technology, Kestrel, and Davis Instruments etc. Amonst these, the handheld anemometer manufactured by LaCrosse Technology has received quite good reviews. This bright yellow, wind speed measuring instrument is a propeller driven anemommeter. This product comes at a low price of about $49.95 and is considered to be a useful device. This handheld anemometer provides accurate value for wind velocity. The features include wind speed detections at mph, km/h, m/s or knots, and the device also contains a Beaufort Wind Scale bar graph. This anemometer also displays wind chill, which indicates how cold the weather is by measuring the wind speed and the temperature, and is useful in the planning of outdoor activities in cold weather. The device also measures temperature both at Celcius and at Fahrenheit. The product contains an LCD backlight, and AUTO power off option, and comes with a neck band and a weatehr proof casing, and. It is a good device for its price and can benefit kite-flyers, sailors and a number of other people.
There are other handheld anemometers as well, and at very cheap prices. But it is not wise to look for a low price device and sacrifce the quality that a moderately priced product offers. Therefore it is necessary to go through a number of similar products and compare the prices before buying a handheld anemometer.