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| Kestrel 2500
· The NK Kestrel 2500 is a pocket-sized precision
instrument for measuring wind speed, temperature, pressure, altitude and wind chill.
· It's ready whenever you are - just slip off the protective case
and press "ON" for fast, accurate readings of the environmental
conditions that affect you most.
· The large liquid crystal display is clear and easy to read under
almost any conditions.
· The Kestrel 2500 can track maximum and average wind speeds along
with current readings, and can display wind speed in your choice of
knots, meters per second, kilometers per hour, miles per hour, feet
per minute or Beaufort scale.
· Temperature and wind chill can be displayed in °C or °F.
Altitude is displayed in feet or meters.
Barometric pressure is shown in inches of mercury or millibars (hectopascals).
· Measuring modes and display units can be changed at any time and
all functions are controlled with only two buttons.
· The Kestrel 2500 relies upon a precision ultralight impeller
mounted on jewel bearings to measure wind speed.
· It provides excellent accuracy (± 3%) and the ability to measure
the slightest breeze (0.3 M/S).
· It is protected be a reinforced fiberglass housing and can be
replaced easily and affordably should it become damaged or worn.
· For temperature readings, the Kestrel uses a fast-responding
thermistor accurate to +/-1 °C.
· Wind chill is calculated from wind and temperature data using the
U.S. National Weather Service's official tables.
· The Kestrel 2500 is waterproof and floats and comes with a
convenient neck lanyard.
· The battery is easy to replace and provides 400 hours of use.
· The protective case prevents damage to the unit.
· Now with a 5-year warranty.
·
Wind Speed Functions
Operating Modes: Moving three-second average (wind speed), average
since power on (AVG) or maximum three second gust since power on
(MAX).
Update: 1 second.
Units: Knots (KT), meters per second (M/S), kilometers per hour
(KM/H), miles per hour (MPH), feet per minute (FPM) and Beaufort
(B).
On-axis Accuracy: +/-3% of reading or +/-least significant digit,
whichever is greater.
Off-axis Response: -1% @ 5 °, -2% @ 10 °, -3% @ 15 °.
Calibration Drift: <2% after 100 hours operation at 7 M/S
Minimum Speed: 0.3 M/S (~0.6 KT, 1KM/H, 0.7 MPH, 60 FPM).
Maximum Speed: 40 M/S (~78 KT, 144 KM/H, 89 MPH, 7830 FPM). (Note:
Extensive operation at or near maximum speed may result in impeller
bearing wear and reduced accuracy.)
Temperature and Wind Chill Functions
Operating Modes: Temperature, wind chill.
Update: 1 second.
Units: Degrees Centigrade (°C) and degrees Farenheit (°F).
Accuracy: +/-1°C.
Resolution: +/-0.1°C temperature, +/-0.1°C wind chill.
Altimeter and Barometer functions
Altitude resolution 1m
Altitude range = (1500)ft to 30,000ft
Pressure range = 25.70 to 31.90 inHg or 870.0 to 1080.0 millibars
Pressure accuracy = +-0.09inHg (+-3millibars)
Other Functions
Buttons: Two sealed tactile rubber buttons control all functions.
Auto Shutdown: 30 minutes after last key press.
Battery: User-replaceable CR2032 coin cell. Typical life, 400 hours.
Environmental Specifications
Sealing: Electronics enclosure IP67 - water resistant to 1meter
(3feet). Unit floats.
Shock: Drop tested to 2meters (6feet).
Operating Temperature: LCD functional temperature range, -15 °C to
50 °C (5 °F to 122 °F).
Storage Temperature: Safe storage temperature range, -20 °C to 80 °C
(-4 °F to 176 °F).
Physical Specifications
Impeller: Diameter 25mm (1in.). High precision jewel bearings. User
replaceable impeller assembly.
Temperature Sensor: Hermetically sealed thermistor.
Display: Reflective LCD, 9 mm (0.36 in.) digit height.
Case: Slip-on hard case protects display, buttons and impeller.
Dimensions: Unit, 122 x 42 x 14 mm (4.8 x 1.7 x 0.6 in.); case, 117
x 46 x 19 mm (4.6 x 1.8 x 0.7 in.); lanyard, 0.5 m (10 in.).
Weight: Unit, 43 grams (1.5 ounces); case, 23 grams (0.8 ounces).
Temperature Limitations
The Kestrel temperature sensor is able to measure temperatures as
low as -30C (-22F) and as high as 70C (158F). The sensor and
electronics simply won't measure beyond this range. The Kestrel is
able to display wind chill measurements lower than -30C, depending
on wind conditions. It is also able to display heat index
measurements above 70C, depending on humidity conditions.
Furthermore, the Kestrel display will not function if the display
itself gets below -15C. However, if the unit is kept in a pack or
pocket or other warm area, the display itself should not get this
cold. In other words, try not to leave the Kestrel outside in
temperatures below -15C.
NEW! FULL 5 YEAR WARRANTY on entire system, covering manufacturing
defects. |
