at right is the Kestrel 2000 with
cover and an optional extra removable impeller
Wind Speed Functions
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
Temperature, wind chill.
Update: 1 second.
Units: Degrees Centigrade (°C) and
degrees Farenheit (°F).
Resolution: +/-0.1°C temperature,
+/-0.1°C wind chill.
sealed tactile rubber buttons control all
Auto Shutdown: 30 minutes after last key
Battery: User-replaceable CR2032 coin
cell. Typical life, 400 hours.
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
Storage Temperature: Safe storage
temperature range, -20 °C to 80 °C (-4 °F to
25mm (1in.). High precision jewel bearings. User
replaceable impeller assembly.
Temperature Sensor: Hermetically sealed
Display: Reflective LCD, 9 mm (0.36 in.)
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).
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
warranty on entire system, covering manufacturing