All Kestrel 1000-5700 Series Meters & D1-D3 DROP Specifications

KESTREL 1000-3500 SERIES SPECIFICATIONS

KESTREL 1000-3500 SERIES  SENSORS

SENSOR

ACCURACY (+/-)

RESOLUTION

SPECIFICATION RANGE

NOTES

Wind Speed |Air Speed

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

0.6 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

1 inch|25 mm diameter impeller with precision axle and low-friction Zytel® bearings. Startup 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 startup. Off-axis accuracy

-1% @ 5º off axis; -2% @ 10º; -3% @ 15º. Calibration drift < 1% after 100 hours use at 16 MPH |7 m/s. Replacement impeller (NK PN-0801) field installs without tools (US Patent 5,783,753). Wind speed calibration and testing should be done with triangle on impeller located at the top front face of the Kestrel. Measuring wind speeds above 60 m/s / 134.2 mph can damage the impeller.

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

Airflow of 2.2 mph|1 m/s or greater provides fastest response and reduction of insolation effect. For greatest accuracy, avoid direct sunlight on the temperature sensor and prolonged sunlight exposure to the unit in low airflow conditions.

Calibration drift is negligible for the life of the product. For further details, see Display & Battery Operational Temperature Limits.

Relative Humidity

3%RH

0.1 %RH

5 to 95% 25°C non-condensing

To achieve stated accuracy, unit must be permitted to equilibrate to external

temperature when exposed to large, rapid temperature changes and be kept out of direct sunlight. Calibration drift is typically less than ±0.25% per year.

Pressure

1.5 hPa|mbar

0.044 inHg

0.022 PSI

0.1 hPa|mbar

0.01 inHg

0.01 PSI

25°C/77°F

750-1100 hPa|mbar

22.15-32.48 inHg

10.88-15.95 PSI

Monolithic silicon piezo-resistive pressure sensor with second-order temperature correction. Between 1100–1600 mbar, unit will operate with reduced accuracy. Sensor may not operate above 1600 mbar and can be damaged above 6,000

mbar or below 10 mbar. Calibration drift is negligible for the life of the product.

CALCULATED MEASUREMENTS

MEASUREMENT

ACCURACY (+/-)

RESOLUTION

SENSORS EMPLOYED

Altitude

typical: 23.6 ft/7.2 m from 750 to 1100 mBar max: 48.2 ft/14.7 m

from 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)

Delta T

3.2 °F

1.8 °C

0.1 °F

0.1 °C

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

Heat Index

7.1°F

4.0°C

0.1 °F

0.1 °C

Temperature, Relative Humidity

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

ADDITIONAL PRODUCT INFO

Display Reflective LCD
Backlight Standard or dim red (NV models only) backlight. Manual activation with auto-off.
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.
Auto Shutdown After 45 minutes with no key presses.
Clock Real Time Hour:Minute Display
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 Requires one CR2032 battery, included. Up to 300 hours of use, reduced by backlight use.
Shock Resistance MIL-STD-810g, Transit Shock, Method 516.6 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 n ecessary to take reading.
Storage Temperature -22.0 °F to 140.0 °F | -30.0 °C to 60.0 °C.
Size & Weight 4.8 x 1.9 x 1.1 in | 12.2 x 4.8 x 2.8 cm, 3.6 oz | 102 g (Including slip-on cover).

*Note: Accuracy calculated as uncertainty of the measurement derived from statistical analysis considering the combined effects from primary sensor specifications, circuit conversions, and all other sources of error using a coverage factor of k=2, or two standard deviations (2Ʃ)

**Note: These specifications are valid for all Kestrel 1000, 2000, 2500, 3000, 3500 series with a serial number higher than 2262687. If your product has a lower serial number, please reference the K4000 specifications 329011.

KESTREL 5000-5700 SERIES SPECIFICATIONS

KESTREL 5 SERIES SENSORS

SENSOR ACCURACY (+/-) RESOLUTION SPECIFICATION RANGE NOTES
Wind Speed |Air Speed 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* 1 inch|25 mm diameter impeller with precision axle and low-friction Zytel® bearings. Startup 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 startup. Off-axis accuracy -1% @ 5º off axis; -2% @ 10º; -3% @ 15º. Calibration drift < 1% after 100 hours use at 16 MPH |7 m/s. Replacement impeller (NK PN-0801) field installs without tools (US Patent 5,783,753). Wind speed calibration and testing should be done with triangle on impeller located at the top front face of the Kestrel. Measuring wind speeds above 60 m/s / 134.2 mph can damage the impeller.
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 Airflow of 2.2 mph|1 m/s or greater provides fastest response and reduction of insolation effect. For greatest accuracy, avoid direct sunlight on the temperature sensor and prolonged sunlight exposure to the unit in low airflow conditions.Calibration drift is negligible for the life of the product. For further details, see Display & Battery Operational Temperature Limits.
Relative Humidity 2%RH 0.1 %RH 10 to 90% 25°C non- condensing To achieve stated accuracy, unit must be permitted to equilibrate to external temperature when exposed to large, rapid temperature changes and be kept out of direct sunlight. Calibration drift is typically less than ±0.25% per year.
Pressure 1.5 hPa|mbar 0.044 inHg 0.022 PSI 0.1 hPa|mbar 0.01 inHg 0.01 PSI 25°C/77°F 700-1100 hPa|mbar 20.67-32.48 inHg 10.15-15.95 PSI Monolithic silicon piezo-resistive pressure sensor with second-order temperature correction. Between 1100–1600 mbar, unit will operate with reduced accuracy. Sensor may not operate above 1600 mbar and can be damaged above 6,000 mbar or below 10 mbar. Calibration drift is negligible for the life of the product.
Compass 1° 1/16th Cardinal Scale 0 to 360° 2-axis solid-state magneto-resistive sensor mounted perpendicular to unit plane. Accuracy of sensor dependent upon unit’s vertical position. Self-calibration routine eliminates magnetic error from batteries or unit and must be run after every full power- down (battery removal or change). Readout indicates direction to which the back of the unit is pointed when held in a vertical orientation. Declination/variation adjustable for True North readout.

ADDITIONAL PRODUCT INFO

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. WBGT requires about 8 minutes to reach 95% accuracy and about 15 minutes to reach 99% accuracy after exposure to large environmental changes.
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. Kestrel 5 series units hold over 10,000 data points.
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, FCC, IC tested and WEEE compliant. Individually tested to NIST-traceable standards.
Origin Designed and built 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, alert light and buzzer, or Bluetooth radio transmission use.
Shock Resistance MIL-STD-810g, Transit Shock, Method 516.6 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)

KESTREL D1-D3 SERIES DROP SPECIFICATIONS

KESTREL DROP SENSORS

ACCURACY (+/-)

RESOLUTION

SPECIFICATION RANGE

NOTES

Ambient Temperature

0.9 °F

0.5 °C

0.1 °F

0.1 °C

14 to 131°F

-10 to 55 °C

Airflow of 2.2 mph|1 m/s or greater provides fastest response and reduction of insolation effect. For greatest accuracy, avoid direct sunlight on the temperature sensor and prolonged sunlight exposure to the unit in low airflow conditions.

Calibration drift is negligible for the life of the product. For further details, see Battery Operational Temperature Limits.

Relative Humidity

2%RH

0.1 %RH

10 to 90% 25°C non- condensing

To achieve stated accuracy, unit must be permitted to equilibrate to external temperature when exposed to large, rapid temperature changes and be kept out of

direct sunlight. Calibration drift is typically less than ±0.25% per year.

Pressure

1.5 hPa|mbar

0.044 inHg

0.022 PSI

0.1 hPa|mbar

0.01 inHg

0.01 PSI

25°C/77°F

700-1100 hPa|mbar

20.67-32.48 inHg

10.15-15.95 PSI

Monolithic silicon piezo-resistive pressure sensor with second-order temperature correction. Between 1100–1600 mbar, unit will operate with reduced accuracy. Sensor may not operate above 1600 mbar and can be damaged above 6,000 mbar

or below 10 mbar. Calibration drift is negligible for the life of the product.

CALCULATED MEASUREMENTS

MEASUREMENT

ACCURACY (+/-)

RESOLUTION

SENSORS EMPLOYED

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

Heat Index

7.1°F

4.0°C

0.1 °F

0.1 °C

Temperature, Relative Humidity

THI (NRC)

1.5 °F

0.8 °C

0.1 °F

0.1 °C

Temperature, Relative Humidity

THI (Yousef)

2.3 °F

1.3 °C

0.1 °F

0.1 °C

Temperature, Relative Humidity

Wet Bulb Temperature - Psychrometric

3.2 °F

1.8 °C

0.1 °F

0.1 °C

Temperature, Relative Humidity

Pressure

ADDITIONAL PRODUCT INFO

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. WBGT requires about 8 minutes to reach 95% accuracy and about 15

minutes to reach 99% accuracy after exposure to large environmental changes.
Data Storage Logged history stored for every measured value. Auto-store interval settable from 2 seconds to 12 hours*, overwrite on or off. D1: >13,000 data points, D2: >7,000 data points, D3: >6,000 data points.
Bluetooth® Data Connect Option Wireless range up to 100ft|30m. Compatible with Kestrel LiNK app for iOS (model 4s and later) and select Android products (Android 4.3 and higher) (See website for complete list of compatible 3rd party apps).
Certifications CE certified, RoHS, FCC, IC tested 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 User-replaceable CR2032 (included).
Shock Resistance MIL-STD-810g, Transit Shock, Method 516.6 Procedure IV; unit only; impact may damage replaceable impeller.
Sealing Waterproof (IP67 and NEMA-6)
Battery Operational Temperature Limits 0° F to 140° F |-18 °C to 60 °C Measurements may be taken beyond the limits of the operational temperature range of 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 2.4 x 1.8 x 0.9 in | 6 x 4.5 x 2.3 cm 1.2oz | 34g (Lithium battery included)