Kestrel 5500FW Fire Weather Meter Pro

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The all-in-one hand-held belt weather kit replacement, including every critical weather measurement, PIG and FDFM. Measure, log, track trends and expand capabilities with free Kestrel LiNK App (LiNK model only).
$355.00
Availability: In stock
SKU
0855FW

Maximum 23 characters


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  • Measures wind speed (anemometer) and direction, temperature (thermometer), humidity (hygrometer), water vapor content of the atmosphere (psychrometer), plus 10 other meterological paramenter.
  • All measurements displayed real-time and stored in memory for monitoring trends.
  • Probability of Ignition (PIG) and Fine Dead Fuel Moisture (FDFM) built-in for readings with no reference tables needed.
  • Quick and consistently accurate measurements reduce the risk of human error possible with manual weather kits.
  • Large, hi-res, hi-contrast, graphic display is perfectly readable in the brightest sunlight and is backlit for nighttime use.
  • Optional LiNK connectivity powered by Bluetooth® low energy provides wireless communication to mobile devices and computers for in-depth analysis, export and easy communication to FBANs and other crews.
  • Kestrel Rotating Vane Mount included with LiNK enabled units to make the world’s most portable weather station.
  • Rugged (drop tested to MIL-STD-810G standards), waterproof (sealed to IP67 standards) and floats.
  • Protective pouch, neck lanyard and Lithium AA battery included.
  • 5-year warranty.
  • Visit the Kestrel Fire Weather Minisite for a more detailed look at this breakthrough tool.

Kestrel 5500FW Fire Weather Meter Pro Overview

Environmental Measures
Altitude (Barometric)
Barometric Pressure
Compass Direction
Crosswind
Density Altitude
Dew Point Temperature
Fine Dead Fuel Moisture (FDFM)
Globe Temperature
Headwind/Tailwind
Heat Stress Index
Naturally Aspirated Wet Bulb Temperature
Pressure Trend
Probability of Ignition (PIG)
Relative Humidity
Station Pressure (Absolute Pressure)
Temperature
Wet Bulb Temperature (Psychrometric)
Wind Chill
Wind Direction
Wind Speed/Air Speed
Tips For Taking Accurate Measurements

The fast and easy tool for taking weather observations, the Kestrel 5500FW Fire Weather Meter Pro provides NIST-traceable accuracy, reliability and usability when it matters most. Measure every environmental condition plus PIG and FDFM and view trends with on-screen data graphing. Drop-proof, dust-proof, waterproof and able to withstand extreme environments without damage, your Kestrel Fire Weather meter can stand up to the abuses of work on a fire line wherever you’re assigned. A variety of carry pouch options makes it even easier to take your Kestrel Fire Weather meter with you. The Kestrel 5500FW Fire Weather Meter Pro offers a large, high-resolution and contrast display and highly readable numerals. The Kestrel 5500FW also includes a built-in dual color backlight, extra-strong polycarbonate lens and single AA battery operation. In addition to measuring the current environmental conditions, the Kestrel 5500F tracks and logs over 10,000 sets of time-stamped data, providing a complete history of conditions on the fire from the moment you arrive. With optional LiNK wireless connectivity, your data log can be transferred to a Kestrel LiNK app (available on Android) for easy export and email to an FBAN or meteorologist. LiNK enabled units come with Kestrel Vane Mount, creating a wireless pop up weather station for accurate readings and tracking trends.  Data can be downloaded to a PC with either the accessory Kestrel LiNK Dongle or waterproof USB Data Transfer Cable (Both sold separately).

  • Firefighting & First Response
  • Backlight - Switchable White/Red
  • Battery Life Indicator
  • Data Log Graph View
  • Data Logging - Adjustable Interval
  • Date & Time
  • Digital Compass
  • Drop-Tested to MIL-STD-810G
  • Floats
  • Integrated Flip Open Impeller Cover
  • Intuitive Tactile Up/Down/Enter Keypad
  • LiNK Wireless Communication to Mobile Devices (Bluetooth low energy)*
  • Multilingual Menus (English, French, Spanish, German)
  • Pressure Sensor
  • Relative Humidity Sensor
  • Temperature Sensor (Patented External Isolated)
  • Waterproof to IP67 (3'/1M for 30 minutes)

    • * Applies to LiNK models only

  • Battery - 1 x AA
  • Certificate Of Conformity (Spec Sheet)
  • Instructions
  • Lanyard
  • Protective Drawstring Pouch
SENSORS
SENSORS ACCURACY RESOLUTION SPECIFICATION RANGE NOTES
Wind Speed | Air Speed Larger of 3% of reading, least significant digit or 20 ft/min Speed 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 noncondensing 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
1/16th 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.

CALCULATED MEASUREMENTS
MEASUREMENT ACCURACY (+/-) RESOLUTION SENSORS EMPLOYED
Air Density 0.0002 lb/ft3
0.0033 kg/m
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 Speed, User Input (Duct Shape & Size)
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)
Crosswind & Headwind/Tailwind 7.1% 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”) 4.9gpp
.7g/kg
0.1 gpp
0.01 g/kg
Temperature, Relative Humidity Pressure
Probability of Ignition (PIG) PIG Accuracy dependent on proximity of inputs to reference table steps. 10% 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
Relative Air Density .0.3% 0.1% Temperature, Relative Humidity Pressure
Wet Bulb Temperature - Psychrometric 3.2 °F
1.8 °C
0.1 °F
0.1 °C
Temperature, Relative Humidity Pressure
Wet Bulb Temperature - Naturally Aspirated (NWB TEMP) 1.4 °F
0.8 °C
0.1 °F
0.1 °C
Wind Speed, Temperature Globe 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 & Backlight Multifunction, multidigit 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 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, 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 5 Series Certificates of Comformity

Kestrel 5 Series specification chart



Models & SKUs:

  • Kestrel 5500FW Fire Weather Meter PRO(orange): 0855FWORA
  • Kestrel 5500 Fire Weather Meter PRO with LiNK + Vane Mount (orange) 0855FWLVORA


Support Documents for all Kestrels

Replacing the Kestrel Impeller

Fine Dead Fuel Moisture and Probability of Ignition Tables

Kestrel 5 Series Instruction Manuals

Instructions for the use of the Kestrel LiNK App

Kestrel 5500 Fires Weather Pro & Kestrel 5400 Fire Weather Pro with WBGT User Guide

Kestrel 5 Series Certificates of Comformity

Kestrel 5 Series specification chart

LiNK (Kestrel)

Please see the attached guidance for problems and export issus with Kestrel LiNK iOS.

This tutorial will show you how to create a graph of the data that you exported from your Kestrel 5000 series or Kestrel DROP using one of the Kestrel LiNK applications.

An application that can be used to view and analyze your Kestrel data on an Android device.

Kestrel 5 Series Downloads

How to Figure out Average Wind Direction with a Kestrel 5000 Series Unit.

The attached links will help with determining average wind direction and the use of a wind rose. The documents would be pertinent to any of the 5500 models, especially important for spray drift and measurements in the protected zones.

Tips for taking accurate measurements Support tab at www.kestrelinstruments.com

Kestrel 5 Series Troubleshooting Documents

A simple guide to help you update your Firmware on your Kestrel using LiNK for Android

A simple guide to help you update your Firmware on your Kestrel using LiNK for Windows

Troubleshooting Bluetooth Dongle Issues with the Kestrel 5000 Series Models and LiNK for Windows.

Product Questions

"All measurements not available in all units"

Temperature Functions

For best accuracy when taking temperature measurements you must keep the air moving around the temperature sensor and keep the Kestrel out of prolonged, direct sunlight. If there is a strong breeze, just point the Kestrel into the wind. If there is no wind, swing the Kestrel around in a circle on its lanyard or rapidly wave it back and forth in hand. This ensures that the sensor measures the temperature of the air rather than the temperature of the case. Alternatively, if you have time, allow the Kestrel to rest where you want to measure the air temperature (NOT in your hand or in direct sunlight if there is no wind) until the case temperature equalizes with the air temperature. When equalized, the display will read a constant value. Be aware that this could take a few minutes, particularly if there is no wind.

Humidity Functions

One reason your Kestrel may not be reading accurate ambient humidity is because of proximity to humidity sources such as your hand, your body or the ground. Avoid covering the large humidity chamber opening on the case rear with your fingers. Keep all fingers below the finger groove and away from the chamber opening. Do not take reading that rely upon humidity with the Kestrel meter lying flat – raise it into the air vertically or stand it on its base and orient it into the wind or air flow. If a high level of accuracy is required for measurements involving humidity, do not hold the unit while taking measurements. Taking readings with the Kestrel in your hand or over your body can raise relative humidity by 5% or more. A Kestrel vane mount will isolate the Kestrel Meter from erroneous humidity influences and keep it oriented into the wind or air flow while taking measurements. Whenever you move your Kestrel Meter into a new environment wait until the primary sensor values have stabilized (Temperature, Humidity, etc.) before taking measurements that rely upon these values. After a large change in environmental condition, this may take 15 minutes or more, with humidity potentially taking the longest. If the humidity sensor housing (located above the rear label) is wet, the Kestrel cannot take an accurate humidity reading. If the sensor does become wet, shake the unit vigorously to remove the water, and then let it dry completely before use. If the sensor comes in contact with salt water, rinse it thoroughly with clean water, then shake it and allow it to dry. As is typical with humidity sensors, it is possible for the humidity sensor in the Kestrel to drift over time as described in the spec sheet. If your unit has a Humidity recalibration function, it can be returned to the factory or used with the Kestrel RH Calibration Kit to recalibrate its humidity readings.

Wind Meter Functions

Wind speed is highly dependent on surrounding obstructions such as buildings, yourself and the ground, with wind speeding up as it flows around and over obstacles and slowing down as it passes behind them. Even in an open area, Wind speed will be slower near the ground so ensure you are taking measurements at an appropriate height for your application. Hold the back of the unit directly into the wind. Holding the unit off-axis by 5° will reduce accuracy by 1%, 10° will reduce accuracy by 2% and 15° will reduce accuracy by 3%. Using a Kestrel Vane Mount will ensure the unit is correctly oriented into the wind and measuring accurate wind speeds. The Kestrel impeller housing can rotate in the unit. For best accuracy, ensure one of the three “arms” of the impeller housing is pointing straight up. The wind speed displayed by the Kestrel Meter is a 3 second rolling average. This allows the unit to provide a value that is more representative of the typical, ambient conditions but not capture peak speeds for instantaneous blasts of air.

Compass Functions

The compass in the Kestrel Meter is used for direction, crosswind, headwind/tailwind as well as for capturing various user inputs based on direction. When calibrating and when using the compass, it is important to hold the unit as vertically as possible. Any tilt in angle present when the unit is calibrated or when measurements are taken will negatively impact the accuracy of the compass reading. Many users will inadvertently tilt the Kestrel Meter away from themselves slightly when holding the unit. If a high level of accuracy is required, using a Kestrel vane mount on a leveled tripod for calibration and measurement can eliminate error.

Pressure Functions

All pressure and altitude measurements are made using the pressure sensor. Some units have a dedicated “Pressure” screen which shows Station Pressure, the raw pressure reading straight from the sensor. The Barometric Pressure measurement (Baro) displays the local Barometric Pressure using the Station Pressure measurement adjusted to the local altitude using the Reference Altitude value input by the user. The Altitude measurement displays the local altitude using the Station Pressure measurement combined with the Reference Baro value input by the user. To obtain an accurate barometric pressure or altitude readings, you must first know EITHER your location’s current barometric pressure OR your current altitude. If the Reference Altitude value is incorrect, the Barometric Pressure reading will also be incorrect. If the Reference Barometric pressure value is incorrect, the Altitude reading will also be incorrect. Because Barometric Pressure and Altitude are each dependent on the alternate reference value remaining constant, Barometric Pressure and Altitude cannot be accurately measured simultaneously. If your unit has a pressure recalibration function, a new Barometric Pressure calibration value may be input. If this value was not taken from a verified source (a local airport or weather station) with the Kestrel being calibrated at the same location as the reference device, pressure related measurements may be incorrect.

WBGT

When changing environments (such as moving form an air conditioned room to outdoors or removing the unit from your pocket) the unit requires between 8-15 minutes to equilibrate to its surroundings before taking readings. Take measurements at least 3 feet off the ground and in the same wind or air flow conditions as the people you are monitoring. Ensure the Kestrel is oriented into the wind and able to measure the full wind value. A tripod or pole mount and the Kestrel Rotating Vane Mount are ideal for ensuring accurate measurements. Differences in the reflectivity of ground surfaces such as grass or asphalt will impact measurements. Be sure to take measurements in the same solar/radiant heat environment as the people you are monitoring. Unlike best practices for other measurements, WBGT is intended to be taken in direct sunlight. As long as there is occasional wind the Kestrel has software that allows it to maintain an accurate WBGT reading despite being placed in direct sunlight.

Air Flow

Kestrel Professional Meters can calculate air flow through a duct by combining user input information about the size and shape of the duct with the measured air velocity. In addition to reading the instantaneous Air Flow off the main measurement screen, a more accurate result may be obtained by capturing an average air flow on the Min/Ave/Max screen while traversing the duct. Traversing consists of dividing the area of the duct into evenly sized sections and averaging the air flows at the center of all sections. By spending an equal amount of time at each measurement location and quickly moving between measurement locations, the average air flow measurement can provide a more accurate measure of the air flow in the duct. Capturing an average can be particularly helpful when measuring ducts with registers or dimensionally uneven air flow.

Air Flow Diagram

Evaporation Rate

(Kestrel 5200 Professional Environmental Meter) Kestrel Professional Meters can calculate a concrete evaporation rate (ACI 308) by combining a user input concrete temperature with measured air temperature, wind speed and relative humidity. Concrete mix temperature is generally measured with a probe or infrared thermometer and should be read at the time of making the evaporation rate measurement After inputting the mix temperature, hold the unit vertically, approximately 20 inches above the surface of the concrete while facing the rear of the unit directly into the wind. To avoid inaccurate Evaporation Rate readings due to thermal loading it is best to shade the Kestrel. (Be sure the source of shade is not obstructing the wind speed measurement.) The ACI recommends taking a 6-10 second average of the evaporation rate to account for fluctuating wind speeds. To measure an average Evaporation Rate, scroll right from the Evaporation Current Measurement Screen to the Min/Ave/Max Screen and press select to manually start and stop a capture.

... Read more

Yes! The Kestrel 5 Series now has both Android and iPhone integration through our Kestrel LiNK iOS and Android Apps. Kestrel LiNK iOS and Android apps allow LiNK enabled Kestrel 5 Series Meters and DROPs to connect wirelessly with mobile devices to view real-time measurements, receive on-screen alerts, download data and perform firmware updates. The Kestrel LiNK Ballistics app, designed specifically for the Kestrel 5700, Kestrel 5 series Sportsman, and Kestrel 5700 Elite meters, provides full gun management and access to the Applied Ballistics library of G1/G7 curves (5700) and custom drag models (Elite). For a quick look at all of the Kestrel LiNK Application Features - Click Here.

Link Features ... Read more

Make sure Bluetooth® is turned ON on your phone. On the Kestrel, go to the Main Menu->Bluetooth and turn it ON. Press the center button while Bluetooth is highlighted and check to ensure that Conct is set to PC/Mobile and it shows Available.  Next go to the application that you are connecting with on your phone and select the Kestrel as the device you would like to connect with.  Please note: if you do not find the Kestrel on your phone’s “standard” Bluetooth connection screen, that does not mean that the Kestrel is not working properly. Please first go to the application and try to connect through the application. The Kestrel should connect.

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All models of the Kestrel 5000 Series have optical data ports that can be seen through the openings of the battery door. A USB Data Transfer Cable can be purchased separately, which plugs directly into the back of the Kestrel and extends to a USB port in your computer.  You will NOT be able to connect a non-LiNK model unit to a mobile device (e.g., any device without a USB port).

... Read more

These programs handle uploading the weather data from the Kestrel to a specific device. This weather data can then be exported into MS Excel. You can also update your firmware any of these programs. Visit the Kestrel LiNK Software and Apps page to learn more.

... Read more

To UPDATE your firmware on any Kestrel you can use the appropriate link below:

As can be seen in the pictures below, place your thumb on the bottom of the unit and slide the latch from the “Locked” to the “Unlocked” position. The battery door should pop up enough that you can remove it. If you have trouble opening the battery door, some slight pressure DOWN on the battery door itself with your other thumb may help release the latch.


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First slide in the tab at towards the top of the unit, then gently press the bottom part of the battery door down until it snaps into place.  Ensure that the O-ring remains in place on the battery door when closing.

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No. Since the Kestrel 5 Series meters utilize only one AA battery, there is no need to use the battery shim to separate two AAA batteries as in the previous version.

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NK strongly recommends continual use of Lithium AA batteries in your Kestrel.  Lithium batteries respond best in extreme temperatures and help prevent against any corrosion.  Customers can also use Alkaline or Nickel Metal Hydride (NiMh) if they prefer, but we recommend turning “Auto Store” to “OFF” when placing these units in storage to minimize the drain on the battery.  Also, please make sure you set the System->Battery setting to match the type of batteries that you are using.

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No. Currently ONLY the Kestrel Sportsman Weather Meter with Applied Ballistics or the Kestrel 5700 Ballistics Weather Meter can be upgraded to the Kestrel 5700 Elite model.

... Read more

All of the Kestrel 5000 series units have the Night Vision option in addition to the standard white backlight.  There is a menu selection that allows the customer to toggle between both options.

... Read more

Wind Speed – NK sells factory calibrated replacement impellers that can easily be installed by the customer. NK recommends replacing the impeller every 2-3 years depending on usage.

Humidity – The Kestrel 5 Series and DROP data loggers employ a highly accurate, calibrated, digital humidity sensor. Based on the sensor manufacturer's specifications and NK testing, drift on this sensor over time is minimal and field recalibration is likely to degrade accuracy rather than improve it. Factory calibration to validate and certify accuracy at a minimum of two RH points is available from NK. In the event NK observes a significant number of tested sensors exhibiting drift greater than +/-1%RH/year, NK will develop a recalibration routine which can be installed via firmware update. During the five-year warranty period, NK will repair, recalibrate or replace any Kestrel 5 Series or DROP which drifts more than +/-1% RH/year since the date of manufacture.

Temperature – The thermistor in the Kestrel 5 series should not need to be recalibrated. If you think your sensor is incorrect, please contact techsupport@nkhome.com

Pressure – The pressure in the Kestrel 5 series should not need to be recalibrated. If you think your sensor is incorrect, please contact techsupport@nkhome.com

... Read more

Kestrel 5 series units with LiNK will need to use the Kestrel LiNK Wireless Dongle to connect with a computer. The Kestrel 5 series will not work with any internal Bluetooth modules. To connect, insert the Kestrel LiNK Dongle into an open USB port. On the Kestrel, go to the Main Menu->Bluetooth and turn it ON. Set Conct to "PC / Mobile." Open the application on the computer and select the Kestrel as the device to connect to. There is no more “pairing," "COM port numbers," or "PIN Codes" to worry about for those familiar with the 4000 series.

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Please see our graphing guide:

LiNK (Kestrel)

This tutorial will show you how to create a graph of the data that you exported from your Kestrel 5000 series or Kestrel DROP using one of the Kestrel LiNK applications.

... Read more

Yes! The Kestrel 5 Series now has both Android and iPhone integration through our Kestrel LiNK iOS and Android Apps. Kestrel LiNK iOS and Android apps allow LiNK enabled Kestrel 5 Series Meters and DROPs to connect wirelessly with mobile devices to view real-time measurements, receive on-screen alerts, download data and perform firmware updates. The Kestrel LiNK Ballistics app, designed specifically for the the Sportsman , the Kestrel 5700, and the Kestrel 5700 Elite meters, provides full gun management and access to the Applied Ballistics library of G1/G7 curves (Sportsman and 5700) and custom drag models (5700 Elite).

... Read more

Transfer data from your Kestrel 5 Series device and archive on your Mac computer. Data logs can be exported as csv files for viewing and analysis in spreadsheets. This software also facilitates updates and upgrades to your device firmware.

Download Kestrel LiNK for MAC:

LiNK (Kestrel)

Kestrel LiNK Version 1.04.04 for OSX


Quick Look

  • Manage updates and upgrades to device firmware
  • View device information such as device name, model number, firmware version, hardware version and serial number. Rename device.
  • Transfer data from your Kestrel 5 Series device wirelessly or with a USB cable.
  • Archive data logs.
  • Export data logs in csv format for viewing and analysis in spreadsheets.

Example Screen Shots


Easily connect your Kestrel to the application using bluetooth.

Manage your Kestrel: change its name, download data, and/or update your unit.

Export and analyze your data.


Kestrel Firmware:

Kestrel 5 Series Downloads

Version 1.24

Kestrel Firmware Version 1.24 Update Installer for OSX

Kestrel Firmware Version 1.24 Update Installer for Windows

Device Compatibility:

  • Firmware: This program is only compatible with Mac OS X 10.7 or higher.

Kestrel Compatibility:

  • Kestrel 5000 Environmental Meter with LiNK
  • Kestrel 5100 Racing Weather Meter with LiNK
  • Kestrel 5200 Professional Weather Meter with LiNK
  • Kestrel 5400 Heat Stress Tracker with LiNK
  • Kestrel 5500 Weather Meter with LiNK
  • Kestrel Sportsman Weather Meter with Applied Ballistics with LiNK
  • Kestrel 5700 Ballistics Weather Meter with LiNK
  • Kestrel 5700 Elite Weather Meter with Applied Ballistics with LiNK
... Read more
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