New for the fall of 2004, the Kestrel 3500 measures every environmental condition simply with the press of a button!
| Specifications |
| Measurement |
Units of Measure |
Accuracy |
Range |
| Current, Max and Avg Wind Speed |
m/s, km/hr, mph, fpm, kts, Beaufort Force |
±3% of reading
or ±0.1 m/s |
0.6 to 40 m/s
(1.3 to
89
mph) |
| Temperature, Wind Chill, Heat Stress, Dewpoint |
°C, °F |
±1°C (±2°F) |
-29 to 70°C
(-20 to 158°F) |
| Relative Humidity |
% |
± 3% or scale |
5 to 95% |
| Pressure |
hPa, inHg |
± 3 hPa |
870.0 to 1080.0 hPa
(25.70 to 31.90 inHg) |
| Relative Humidity |
% |
± 3% or scale |
5 to 95% |
| Altitude |
feet, meters |
± 30 meters (at standard atmospheric conditions) |
-500 to 9000 meters
(-1500 to 30000 feet) |
| Display Update |
1 second |
| Display Size |
Reflective 3 1/2 digit LCD, 9 mm (0.36 in.) digit height |
| Off-Axis Wind Speed Accuracy |
-1% @
5° off-axis; -2% @ 10°; -3% @ 15° |
| 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 1 m. (3 ft.) |
| Shock Resistance |
Drop tested to 2 m. (6 ft.) |
| Auto Shutdown |
45 minutes after last key press |
| Battery |
User-replaceable CR2032 coin cell; typical life, 400 hrs |
| Impeller |
25 mm (1 in.) diameter, sapphire bearings, light weight; user-replaceable without tools |
| Temperature Sensor |
Hermetically sealed precision thermistor |
| Humidity Sensor |
Silicon based capacitive sensor |
| Pressure Sensor |
Monolithic Silicon Piezoreisitive sensor |
| Dimensions |
unit: 122 x 42 x 20 mm (4.8 x 1.7 x 0.8 in.)
cover: 122 x 46 x 26 mm (4.6 x 1.8 x 1.1 in.) |
| Weight |
unit: 2.3oz (65gr)
cover: 1.3oz (37gr) |
| Operating Temperature |
LCD readability is lost above 50°C (122°F) and below -15°C (5°F). 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 -20°C to 80°C (-4°F to 176°F) |
| Temperature Limitations |
The Kestrel temperature sensor is able to measure temperatures as low as -30C (-22F) and as high as 70C (158F). 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. 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. |
| 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. |
| Warranty |
Standard 2-year warranty covers parts and labor. |
