| Physical |
|
| Dimensions |
122mm x 42mm x 20mm |
| Cover dimensions |
122mm x 46mm x 26mm |
| Weight |
65g |
| Cover weight |
37g |
| Lanyard |
0.5m |
| Case colour |
Gold or olive drab for NV version |
| Display type |
Reflective 4 digit LCD |
| Digit height |
9mm |
| Display update |
1 second |
| Display |
|
| Functions (with on screen prompt) |
Current wind speed (3 second average) (SPd)
Average speed since power on (AVG) (SPd)
Maximum 3 second gust since power on (MAX) (SPd) Temperature (deG) Wind chill (chill) Barometric pressure (bAro) Altitude (ALt) Data hold (HOLD)
|
| Speed units |
kt, m/s, km/h, mph, ft/min, Beaufort Force (B) |
| Temperature units |
°C, °F |
| Pressure units |
hPa, inHg |
| Altitude units |
m, ft |
| Performance |
|
| Speed (1 sec response) |
|
| Operational range |
0.4m/s to 60m/s (0.8 to 135.0mph) |
| Specification range |
0.6m/s to 40m/s (1.3 to 89.0mph)
Start-up speed stated as lower limit, readings may be taken down to 0.4 m/s | 79 ft/min | 1.5 km/h | .9 mph | .8 kt after impeller start-up.
|
| On axis accuracy |
Larger of ± 3% of reading or least significant digit. (Some loss of accuracy from bearing wear may occur with sustained operation at or near maximum speed) |
| Off-axis response |
-1% @ 5°, -2% @ 10°, -3% at 15° |
| Calibration drift |
<1% after 100hrs operation at 7m/s |
| Resolution |
0.1 kt, m/s, km/h, mph. 1 FPM below 1999 FPM, 10 FPM above 2000 FPM. 1 Beaufort (0 to 12) |
| Temperature (1 sec response) |
|
| Operational range |
-45.0°C to +125.0°C |
| Specification range |
-29.0°C to +70.0°C |
| Accuracy |
±1°C |
| Resolution |
0.1° |
| Wind chill accuracy |
±1.0°C (from wind speed and temperature) |
| Barometric Pressure (1 sec response) |
|
| Operational range |
10 to 1100 hPa at 25°C |
| Specification range |
750 to 1100 hPa at 25°C |
| Resolution |
0.1 hPa |
| Accuracy |
±1.5 hPa (max error over range 0°C to 70°C: ±2.0 hPa) |
| Calibration drift |
Typically ±1 hPa per year (correctable) |
| Altitude (1 sec response) |
|
| Specification range |
-2000m to +6000m at 25°C |
| Accuracy |
±15m (max error out of spec range: ±30m) |
| Resolution |
1m or 1ft |
| Sensor |
|
| Impeller |
Diameter 25mm.
High precision axle and low-friction Zytel® bearings. Replacement impeller field installs without tools.
|
| Temperature |
Air, water or snow temperature. Hermetically-sealed, precision thermistor mounted externally and thermally isolated (US Patent 5,939,645) for rapid response. Airflow of 2.2 mph | 1 m/s or greater provides fastest response and reduction of insulation effect. Calibration drift negligible. |
| Pressure |
Monolithic piezo-resistive silicon based sensor with second-order temperature correction |
| Environmental |
|
| Sealing |
Electronics enclosure IP67 and NEMA-6 [Water resistant] |
| Shock |
Drop tested (MIL.STD.810F - unit only) |
| Temperature |
Operating range: -10°C to +55°C (for LCD readability and batteries) Storage range: -30°C to +60°C |
| EMC |
CE marked |
| Battery |
Lithium coin cell CR2032, included, user replaceable |
| Battery Life |
300 hours of use, typical ± depending on backlight use |
| Auto switch off |
45 minutes after last key press |
| Cover |
Snap on hard cover for protection |
| Miscellaneous |
|
| Wind chill equivalent temperature calculation |
Perceived temperature resulting from combined effect of wind speed and temperature. Utilises the (US) NWS Wind Chill Temperature (WCT) Index, revised 2001, with wind speed adjusted by a factor of 1.5 to yield equivalent results for wind speed measured at 10m above ground |
| Certification |
Wind speed, temperature and pressure measurements are tested during manufacture. A certificate of conformity (C of C) is included with each Kestrel. Calibration certificates are available for an additional fee.
|
| Guarantee |
5 years |