| SENSOR |
ACCURACY (+/-) |
RESOLUTION |
RANGE |
| Wind Speed | Air Flow |
Larger of 3% of reading, least significant digit or 20 ft/min |
0.1 m/s
1 ft/min
0.1 km/h
0.1 mph
0.1 knots
1 B*
0.1 F/S* |
0.6 to 40.0 m/s
118 to 7,874 ft/min
2.2 to 144.0 km/h
1.3 to 89.5 mph
1.2 to 77.8 knots
0 to 12 B*
2-131.2* |
| Ambient Temperature |
0.9 °F
0.5 °C |
0.1 °F
0.1 °C |
-20.0 to 158.0 °F
-29.0 to 70.0 °C |
| Relative Humidity |
±2%RH |
0.1 %RH |
10 to 90% 25°C non-condensing |
| Pressure |
±1.5 mbar at 25°C, 700-1100
mbar/ ±0.044inHg at 77°F 20.67-
32.48 inHg/
±0.022 PSI 10.15-15.95 PSI |
0.01 inHg
0.1 hPa|mbar
0.01 PSI |
25°C/77°F,
700-1100 mbar/20.67-32.48 inHg/10.15-
15.95 PSI |
| Compass |
±5° |
1°
1/16th Cardinal Scale |
0 to 360° |
| MEASUREMENT |
ACCURACY (+/-) |
RESOLUTION |
SENSORS EMPLOYED |
| Air Density |
0.0002 lb/ft 3
0.0033 kg/m 3 |
0.001 lbs/ft3
0.001 kg/m3 |
Temperature Relative
Humidity Pressure |
| Air Flow |
6.71% |
1 cfm
1 m3/hr
1 m3/m
0.1m3/s
1 L/s |
Air Flow
User Input (Duct Shape & Size) |
| Altitude |
typical: 23.6 ft/7.2 m - 50 to 1100 mBar
max: 48.2 ft/14.7 m – 300 to 750 mBar |
1 ft
1 m |
Pressure
User Input (Reference Pressure) |
| Barometric Pressure |
0.07 inHg
2.4 hPa|mbar
0.03 PSI |
0.01 inHg
0.1 hPa|mbar
0.01 PSI |
Pressure
User Input (Reference Altitude) |
| Crosswind & Headwind/ Tailwind |
7.10% |
1 mph
1 ft/min
0.1 km/h
0.1 m/s
0.1 knots |
Wind Speed Compass |
| Delta T |
3.2 °F
1.8 °C |
0.1 °F
0.1 °C |
Temperature Relative
Humidity Pressure |
| Density Altitude |
226 ft
69 m |
1 ft
1 m |
Temperature Relative
Humidity Pressure |
| Dew Point |
3.4 °F
1.9 °C
15-95% RH. Refer to Range for Temperature Sensor |
0.1 °F
0.1 °C |
Temperature Relative
Humidity |
| Evaporation Rate |
0.01 lb/ft2/hr
0.06 kg/m2/hr |
0.01 b/ft2/hr
0.01 kg/m2/hr |
Wind Speed Temperature
Relative Humidity Pressure
User Input (Concrete Temperature) |
| Heat Index |
7.1°F
4.0°C |
0.1 °F
0.1 °C |
Temperature Relative
Humidity |
| Moisture Content | Humidity Ratio (“Grains”) |
.3gpp
.4g/kg |
0.1 gpp
0.01 g/kg |
Temperature Relative
Humidity Pressure |
| Relative Air Density |
0.30% |
0.10% |
Temperature Relative
Humidity Pressure |
| Wet Bulb Temperature - Psychrometric |
3.2 °F
1.8 °C |
0.1 °F
0.1 °C |
Temperature Relative
Humidity Pressure |
| Wind Chill |
1.6 °F
0.9 °C |
0.1 °F
0.1 °C |
Wind Speed Temperature |
| Display & Backlight |
Multifunction, multi-digit monochrome dot-matrix display.
Choice of white or red LED backlight. |
| Response Time & Display Update |
Display updates every 1 second. After exposure to large environmental changes, all sensors require an equilibration period to reach stated accuracy. Measurements employing RH may require longer periods particularly after prolonged exposure to very high or very low humidity. |
| Data Storage & Graphical Display, Min/Max/Avg History |
Logged history stored and displayed for every measured value. Manual and auto data storage. Min/Max/Avg history may be reset independently. Auto-store interval settable from 2 seconds to 12 hours, overwrite on or off. Logs even when display off except for 2 and 5 second intervals. Data capacity shown. |
Data Upload & Bluetooth®
Data Connect Option |
Wireless range up to 100ft. Connection requires optional USB data transfer cable or Kestrel Link Dongle or Kestrel LiNK app.
Employs Kestrel Link protocol for data transmission with Link supported devices. (Kestrel LiNK for iOS/Android, Kestrel Link for PC/MAC). |
| Clock / Calendar |
Real-time hours:minutes:seconds clock, calendar, automatic leap-year adjustment. |
| Auto Shutdown |
User-selectable – Off, 15-60 minutes with no key presses. |
| Languages |
English, French, German, Spanish. |
| Certifications |
CE certified, RoHS and WEEE compliant. Individually tested to NIST-traceable standards. |
| Origin |
Designed and manufactured in the USA from US and imported components. Complies with Regional Value Content and Tariff Code Transformation requirements for NAFTA Preference Criterion B. |
| Battery Life |
AA Lithium, included. Up to 400 hours of use, reduced by backlight or Bluetooth radio transmission use. |
| Shock Resistance |
MIL-STD-810g, Transit Shock, Method 516.5 Procedure IV; unit only; impact may damage replaceable impeller. |
| Sealing |
Waterproof (IP67 and NEMA-6) |
| Display & Battery Operational Temperature Limits |
14° F to 131° F | -10 °C to 55 °C Measurements may be taken beyond the limits of the operational temperature range of the display and batteries by maintaining the unit within the operational range and then exposing it to the more extreme environment for the minimum time necessary to take reading. |
| Storage Temperature |
-22.0 °F to 140.0 °F | -30.0 °C to 60.0 °C. |
| Size & Weight |
5.0 x 1.9 x 1.1 in / 12.7 x 4.5 x 2.8 cm, 4.3 oz / 121 g. (Lithium battery included) |