Split second decisions in the field leave no time for guesswork
Quickly changing weather conditions require constant, immediate updates. Measure wind speed, temperature, relative humidity, dew point and wet bulb temperature with the Kestrel 3500NV.
Many Kestrel users need to know everything that the weather is doing, but don’t need to log the data. At the press of a button, get all the relevant conditions you need to enable yourself to shift strategies, reduce risk and ensure safety. While the weather can dictate the comfort level of individuals working or playing outside, it plays an even bigger part in many professionals’ jobs. Irrigation professionals use the Kestrel 3500 to ensure they are irrigating efficiently and the water they are dispersing is actually hitting their intended target, and not evaporating or blowing away. On construction sites Kestrel users are preventing plastic shrinkage cracks and curing concrete more effectively with their Kestrel 3500. Note: The Kestrel 3500 in Olive Drab with NV has a night-vision preserving backlight which helps users to sustain natural night vision. The NV's backlight incorporates an optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. Additionally, NV backlights are also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations. This backlight appears soft greyish pink, not red, and is still in the visible spectrum, so is not compatible with night-vision equipment.
It takes 30 to 45 minutes for the average eye to adapt to darkness and maximize night vision. Even a short burst of white, yellow, green or blue light “bleaches out” the rod cell photoreceptors in the eye and causes night blindness until the entire adaptation process can take place again. Light in the red spectrum does not cause this “bleaching out”, preventing night blindness and night vision fatigue.
Check out the video below to see the Kestrel 3500 Yellow Weather Meter being used in some extreme temperatures during an expedition in the Gobe Desert by ExtremeMeters.com customer and explorer, Rose Sandler.
Features
- Simple 3-Button Control
- Large easy to see read LCD display
- Backlight
- CR2032 Coin Cell Battery (Average Life 300 Hours)
- Data Hold Function
- Drop-Tested, MIL-STD-810F
- Kestrel Certificate of Conformity
- Neck Lanyard
- Patented Impeller and Sensor Technology
- Slip-On Protective Cover
- Time of Day
- User-Replaceable Batteries
- User-Replaceable Impeller
- Waterproof & Floats
- Designed and built in the USA
Manufacturer Part Number:
- 3500NV (0835NV)
NSN Number:
-
3500NV: 6660016540064
Measures
- Wind Chill
- Wind Speed
- Altitude
- Barometric Pressure
- Dew Point
- Heat Stress Index
- Pressure Trend
- Relative Humidity
- Temperature
- Wet Bulb Temperature (Psychrometric)
Who is using the Kestrel 3500NV Meter:
- Education & Classroom Use
- Farming & Agriculture
- Outdoor Sports (kite surfing, sailboarding etc..)
- Research & Technology
- Crane Operator
- Gliding
- Event Riggers
- Wildland Firefighters
- Industrial Hygiene
- Military
- Wind Surfing
What's in the box?
- Kestrel 3500NV Meter
- Neck Lanyard
- Slide-On-Cover
- CR2032 Coin Cell Battery (average life 300 hours)
- Kestrel Certificate of Conformity.
- 5 Year Warranty Manufacturers Warranty
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 | 5° | 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) |
Kestrel 1,2,3 Manuals
- Kestrel 1000 Instruction Manual I Download PDF
- Kestrel 2000 Instruction Manual I Download PDF
- Kestrel 2500 Instruction Manual I Download PDF
- Kestrel 3000 Instruction Manual I Download PDF
- Kestrel 3500 Instruction Manual I Download PDF
- Kestrel 3500DT Instruction Manual I Download PDF
- Kestrel 123 Series Certificate of Conformity & Sensor Specifications I Download PDF
Kestrel 5 Series Manuals
- Kestrel 5000 Environmental Meter Quick Start Guide Download PDF
- Kestrel 5100 Racing Weather Meter Quick Start Guide / Manual Download PDF
- Kestrel 5200 Professional Environmental Meter Quick Start Guide Download PDF
- Kestrel 5400 Heat Stress Quick Start Guide | Download PDF
- Kestrel 5500 Quick Start Guide / Manual | Download PDF
- Kestrel 5700 Ruger Gun / Bullet Profiles stored in the Kestrel LiNK Ballistics App | Download PDF
- Kestrel 5700 & 5700 Elite Ballistics Meters Manual (html)
- Kestrel Elite Weather Meters with Applied Ballistics Quick Start Guide / Manual | Download PDF
- Kestrel 5000AG & 5400AG Agriculture and Livestock Meters User Guide | Download PDF
- Kestrel 0854FWLVCORA, 0855FWLORA, 0855FWORA Fire Weather Meters | Download PDF
- Kestrel Fire Weather FDFM, PIG Insert | Download PDF
- Kestrel 5 Series Certificate of Conformity & Sensor Specifications Download PDF
- How to UPDATE your Kestrel 5 Series Meter using Windows | Download PDF
- Latest 5 Series Firmware Updates I Download PDF
- Applied Ballistics Profile Loader for Windows PC | Download PDF
Kestrel DROP Bluetooth Dataloggers
- Getting Started with my Kestrel DROP | Download PDF
- Kestrel DROP FAQ's
- Kestrel DROP Certificate of Conformity & Sensor Specifications I Download PDF
Kestrel Accessories
- How to replace your Kestrel Impeller I Download PDF
-
Relative Humidity Calibration Kit for Kestrel 3000, 3500, 4000, 4200, 4250, 4400, 4500,4600 I Download PDF
Kestrel Dongle
Windows, Mac, iOS & Android Apps for Kestrel 5 Series Meters and Kestrel DROP's
Kestrel LiNK Ballistics for Android & iOS (Series 5 Ballistics Meters)
Wirelessly connect with mobile devices. When in range, manage and transfer gun profiles, adjust Kestrel target range, and view shooting solutions on the mobile device. Most effective when paired with the Kestrel Vane Mount for real-time windage solutions.
Kestrel LiNK for Windows & Mac (Kestrel Series 5 Meters)
Simple communication to Windows and Mac computers is provided through the optional LiNK .USB Dongle or USB Data Transfer Cable. Download your data to view, analyze and archive. Enables firmware update of Kestrel 5 series meters.
Kestrel LiNK for iOS & Android (Works with Series 5 Meters and Kestrel DROP's
Wirelessly connect with iOS and Android devices. When in range, view real-time measurements, receive on-screen alerts and download your data. Logged data can be viewed, analyzed, archived and shared via e-mail, Facebook and Twitter. Enables firmware update of Kestrel 5 series meters. NOTE: Range up to 100’ line of sight – reduced by walls and obstructions.
Blue Ocean Megaphone Manual
- Blue Ocean Megaphone Instructions: Download PDF
Frequently asked questions
FAQ's (Click Here)