Anemometer Kestrel 4000 is a new generation device for weather monitoring. This pocket size and electronic device is used for measurement of wind speed, temperature, wind chill, dew point temperature, wet bulb thermometer temperature (psychrometer), relative humidity, altitude, density altitude, atmospheric pressure and heat stress index. A display also shows time and date.
The anemometer’s impeller of very light structure, has precise, sapphire bearings, what assures accurate wind measurement also with small air speed. In case of damage the impeller can be easily replaced by a user.
The anemometer has an option of memorizing the results also after switching the device off. It is also possible to introduce the results manually after pressing an adequate key button. The meter registers up to 250 measurement points.
Combining of an anemometer and a thermometer allows calculation through a built in device microprocessor an additional parameter –wind chill. The device, apart from a current wind speed, allows on reading maximum wind gust and average in various units.
The anemometer Kestrel 4000 has easy to read LCD display, which is
adapted to showing chosen parameters. Result update can be seen on the
display and takes place every second (for humidity every minute).
The device is powered from a two AAA size batteryies, which assures continuous work of the device through 400 hours. The device switches off automatically its power supply, if no key button is used for more than 15 minutes.
The anemometer is made out of plastic, and its electronic elements
are fully protected from moisture. The device floats, if it is
accidentally dropped into water.
The device is equipped with a soft case and two lanyards (for a wrist and a neck) (protecting the device from being dropped during exploitation).
|Measurement of air speed|
|Scope of measurement||0,4...60 m/s|
|Measurement uncertainty (for a component in a device axis)||+/- 3% of a reading or +/- 0,1 m/s (in range
|Underrating indications for wind tilted from a device’s axis||-1%||for 5° angle|
|-2%||for 10° angle|
|-3%||for 15° angle|
|Calibration drift||<2%||after 100 hours of work
at 7 m/s speed
|Measurement resolution||0,1||kt, m/s, km/h, mph|
|1||FPM||up to 1999 FPM|
|10||FPM||from 2000 FPM|
|Speed measurement result reading||current||average from the last 3 seconds|
|average||an average from the moment of switching on the power supply|
|maximum|| 3-second wind gusts
from the moment of switching on the power supply
|Choice of result units||kt (knots), m/s, km/h, mph (miles per hour), FPM
(foot per minute), Beaufort degrees
|Scope of air temperature measurement||-45...+125 °C (1 minute)
|Measurement uncertainty of air temperature and wind chill||+/- 1 °C (in range -2...70 °C)|
|Measurement uncertainty of dew point temperature||+/- 2 °C|
|Measurement uncertainty of heat stress index||+/- 3 °C|
|Measurement resolution||0,1 °C|
|Temperature measurement result reading||current|
|wind chill, heat stress index temperature|
|Choice of result units||degrees C, F|
|Measurement uncertainty||+/- 3 % (in range 5...95 %)
|Scope of measurement||0...100 %|
|Measurement resolution||0,1 %|
|Calibration drift||+/- 2 %||after 24 months|
|Response time||1 min.|
|ATMOSPHERIC PRESSURE MEASUREMENT|
|Measurement uncertainty||+/- 3 hPa||in the temperature scope: -10°C...+60°C|
|Measurement resolution||0,1 hPa||in the scope: 870... 1080 hPa|
|0,01cali Hg||in the scope: 25.7...31.9 cali Hg|
|Calibration drift||+/- 1 hPa||after 12 months|
|Measurement resolution||1 m||in the scope: -500 ... 9000|
|3 ft (foot)||in the scope: -1600...30000|
|Degree of casing protection||IP67 (waterproof with immersion up to 1 m in depth), floats on the water|
|Scope of work temperatures||-18...+55 °C|
|Scope of storage temperatures||-30...+60 °C|
||2 pieces 1,5V type AAA|
|Battery work time||400 hours|
|Automatic power supply switch off||after 15 minutes|
|Overall outside measurements||127 x 45 x 28 mm|
|Impeller diameter||25 mm|