|
Measurement:
|
Current, Max and Avg
Wind Speed |
|
Units of Measure:
|
mph, fpm, kts,
Beaufort Force |
|
Accuracy:
|
±3% of reading
or ±0.1 m/s |
|
Range:
|
0.7 to 89 mph
(0.3 to 40 m/s) |
|
Measurement:
|
Temperature, Wind
Chill, Heat Stress, Dewpoint |
|
Units of Measure:
|
°F, °C |
|
Accuracy:
|
±2°F (±1°C) |
|
Range:
|
-20 to 158°F
(-29 to 70°C) |
|
Measurement:
|
Relative Humidity |
|
Units of Measure:
|
% |
|
Accuracy:
|
± 3% or scale |
|
Range:
|
5 to 95% |
|
Measurement:
|
Pressure |
|
Units of
Measure:
|
hPa, inHg |
|
Accuracy:
|
± 3 hPa |
|
Range:
|
300.0 to 1100.0 hPa
(8.86 to 32.48 inHg) |
|
Measurement:
|
Altitude |
|
Units of
Measure:
|
feet, meters |
|
Accuracy:
|
± 30 meters (at
standard atmospheric conditions) |
|
Range:
|
-1500 to 30000 feet
(-500 to 9000 meters) |
|
Display Update:
|
1 second |
|
Display Size:
|
Reflective 3 1/2 digit LCD, 0.36 in.
(9 mm) digit height |
|
Off-Axis Wind Speed
Accuracy:
|
-1% @ 5º off-axis; -2% @ 10º; -3% @ 15º |
|
Calibration Drift:
|
< 2% after 100 hours use at 7 M/S (~14
KT, 25 KM/H, 16 MPH or 1,400 FPM) |
|
Environmental Sealing:
|
Electronics enclosure IP67 - water
resistant to 3 ft. (1 m.) |
|
Shock Resistance:
|
Drop tested to 6 ft. (2 m.) |
|
Auto Shutdown:
|
45 minutes after last key press |
|
Battery:
|
User-replaceable CR2032 coin cell; typical
life, 400 hrs |
|
Impeller:
|
1 in. (25 mm) diameter, sapphire
bearings, light weight; user-replaceable without tools |
|
Temperature Sensor:
|
Hermetically sealed precision thermistor |
|
Pressure Sensor:
|
Monolithic Silicon Piezoreisitive sensor |
|
Dimensions:
|
unit: 4.8" x 1.7" x 0.8" (122 x 42
x 20 mm)
cover: 4.6" x 1.8" x 1.1" (122 x 46 x 26 mm) |
|
Weight:
|
unit: 2.3oz (65gr)
cover: 1.3oz (37gr) |
|
Operating Temperature:
|
LCD readability is lost above 122ºF (50ºC)
and below 5ºF (-15ºC). Accurate readings may be
taken beyond these
temperature limits by exposing the unit for the minimum time necessary
to
take and record measurement. |
|
Storage Temperature:
|
Recommended -4 to 176ºF (-20
to 80ºC) |
|
Temperature Limitations:
|
The Kestrel temperature sensor is able to
measure temperatures as low as -22F (-30C) and
as high as 158F (70C). The
Kestrel is able to display wind chill measurements lower than
-22F,
depending on wind conditions. It is also able to display heat index
measurements
above 158F, depending on humidity conditions. The Kestrel
display will not function if the
display itself gets below 5F (-15C).
However, if the unit is kept in a pack or pocket or other
warm area, the
display itself should not get this cold. |
|
Patents:
|
5,783,753; 5,939,645; Other patents
pending. |
|
Certification:
|
Wind speed, temperature and humidity
measurements are tested at the factory before packaging.
Factory
certification is available for additional fee.
Product is CE certified.
|
EWALT® HVAC Professional Reference" border="0">