Anemometer Kestrel 4000 - impeller air flow meter and more...

functions: anemometer, thermometer, hygrometer, barometer
measurement:

air speed
temperature
wind chill
dew point temperature
relative humidity
heat stress index
wet bulb thermometer temperature
altitude
density altitude
barometric pressure

possibility of choosing the result units
result registry
easy to read LCD display
waterproof - IP67
battery powered
small and resistant device

Description

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).

Applications

The anemometer is possible to be used in such fields as:

agriculture - conditions for sprayings, conditions of storing the agricultural produce,
motorization – control of cooling and air-conditioning systems,
aviation – meteorological conditions for conducting the flights of gliders, hang-gliders, balloons,
industry- controlling work conditions, air flow control in technological processes,
coast guard - control of safety conditions,
sport - control of conditions for performing different sports disciplines,
air-conditioning and heat engineering- work control of ventilation and air-conditioning channels,
fire department – assessing wind influence on fire’s spreading,
police - control of the wind on roads (i.e. perpendicular to a way of traffic movement),
science and research- meteorology, aerodynamics, environment testing.

Technical data

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 0,4...40 m/s)
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
	1	Beaufort	0...12
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

TEMPERATURE MEASUREMENT
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
Temperature measurement result reading	wind chill, heat stress index temperature
Choice of result units	degrees C, F

HUMIDITY MEASUREMENT
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
Measurement resolution	0,01cali Hg	in the scope: 25.7...31.9 cali Hg
Calibration drift	+/- 1 hPa	after 12 months

ALTITUDE MEASUREMENT
Measurement resolution	1 m	in the scope: -500 ... 9000
Measurement resolution	3 ft (foot)	in the scope: -1600...30000

WORK CONDITIONS
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

POWER SUPPLY
Battery	2 pieces 1,5V type AAA
Battery work time	400 hours
Automatic power supply switch off	after 15 minutes

MECHANICAL PARAMETERS
Overall outside measurements	127 x 45 x 28 mm
Weight	102 g
Impeller diameter	25 mm