Knowledge Base

Kestrel 5 Series Ballistics

Kestrel 5 Series Ballistics
Learn more about the how to use your Kestrel 5 series ballistics product.

Contents

Measurements and Features

Measurements 5700 Elite
Temperature (°F | °C)
Wind Chill (°F | °C)
Relative Humidity (%)
Heat Stress Index (°F | °C)
Dewpoint Temp (°F | °C)
Wet Bulb Temp (°F | °C)
Station Pressure (Absolute Pressure)
Barometric Pressure (inHg | hPA | psi | mb)
Altitude, m | ft
Density Altitude, m | ft
Features 5700 Elite
LiNK Wireless Connectivity + LiNK Ballistics Mobile App
(optional)

(optional)
Night Vision Preserving Back Light
Measurements 5700 Elite
G1/G7 Ballistic Solver
Muzzle Velocity Calibration
Target Range Estimator
Muzzle Velocity-Temperature Table
Spin Drift
Coriollis Correction
Aerodynamic Jump Correction
Gun Memory 3 16
Targets 1 10
Ballistics Data Limited Full
AB Custom Drag Models  
Range Card  
DSF Calibration  
Multi Target  
Easy Mode

Getting to Know Your Kestrel

Buttons

Button Name Function
POWER Turns Kestrel on and off. Press for on, hold for two seconds to turn off.
OPTIONS/ EXIT Enter the main Options menu or exit a menu.
SELECT Access Settings on any measurement screen or select a menu option to enter its submenu or confirm a task.
UP/DOWN Scroll up and down through measurement screens or menus. Adjust values when entering text in name menus.
LEFT/RIGHT Scroll options left and right. Adjust values in combo menus and setting submenus.
CAPTURE In Weather Mode, manually capture all environmental values. In Ballistics mode, turns on and off continuous wind capture.
BACKLIGHT Turn backlight on or off. (Also turns off automatically after one minute.)

Kestrel Options Menu

Most system-wide and weather setup options are accessed from the main Options menu by pressing the button from any Weather Measurement Screen or the main Targeting Screen.

  • MODE
  • BLUETOOTH
    • Bluetooth On/Off
    • Conct
  • DATA PORT
  • MEMORY OPTIONS
    • Clear Log
    • Auto Store
    • Store Rate
    • Overwrite
  • GRAPH SCALE
  • DISPLAY
    • Auto Shutdown
    • Contrast
    • Backlight
    • SYSTEM
      • Time & Date
      • Compass Cal
      • Measurements
      • Units
      • Lang
      • Batt
      • Humidity Cal
      • Factory Restore
    • ABOUT
      • Version
      • Legal

Kestrel Operating Mode

Your Kestrel Ballistics Weather Meter is both a complete weather meter AND an advanced ballistics calculator. You must select either Weather Mode, Ballistics Mode or Easy Mode depending on the functions you desire:

  • Weather Measurements, History and Data Logs are accessed in Weather Mode.
  • The Targeting Screen and all ballistics settings (Target, Wind, Gun, Environment, Range Card, Ballistics, Manage Guns) are accessed in Ballistics Mode.
  • Easy Mode is a simplified version of Ballistics mode with additional guidance for users new to using the Kestrel.

NOTE! You can also "jump" between Weather and Ballistic modes by pressing the BACKLIGHT button twice quickly. You will enter Weather Mode at the last Measurement Screen used, making it convenient to take advanced wind averaging measurements, for example.

Kestrel Menu Navigation

Types of Menu Items

Targeting Screen

Weather Mode Screen

  • The UP/DOWN buttons navigate between all weather measurements set to "On" in Options|Measurements.
  • The LEFT/RIGHT buttons scroll between the three display screens for the measurement.
  • The OPTIONS button exits the settings submenu and Data Log Detail Screen.

Getting Started

  1. INSTALL BATTERY. Slide the battery door latch and open door. Insert the provided AA lithium battery as indicated by the label. Replace the battery door, ensuring it "clicks"" fully into place.
  2. POWER ON KESTREL. Press to power on Kestrel.
  3. ENTER OPTIONS MENU. Press to enter the Options Menu.
  4. CALIBRATE THE COMPASS. Scroll to and select System. Scroll to and select Compass Cal. Follow the on-screen instructions:
    • Place the base of the Kestrel on a flat surface at least 3 feet from any large metal objects.
    • Start the calibration routine. Rotate the Kestrel around its vertical axis 3 times, keeping the unit as vertical as possible and taking approximately 10 seconds per full rotation. You may need to restart the routine a few times until you get the timing correct.
      Note! When taking compass readings, keep the Kestrel as vertical as possible for maximum accuracy.
  5. EXIT OPTIONS MENU.

Additional Settings

All additional settings are accessed from the options menu.

  1. SET AUTO SHUTDOWN. Scroll to and select Display. Scroll to Auto Shtdwn and choose a time window after which the Kestrel will shut down without any button presses.
  2. SET BACK LIGHT. Scroll to and select Display. Scroll to Backlight and set to either standard White or night vision preserving Red.
  3. SET DATE AND TIME. Scroll to and select System. Scroll to and select Time & Date. Adjust the time and date.
  4. TURN ON/OFF MEASUREMENT SCREENS.Scroll to and select System. Scroll to and select Measurements. Set each measurement screen to either On or Off as desired.
  5. SET UNITS. Scroll to and select System. Scroll to and select Units. To change all units select Global, then set Global to Imperial or Metric, and then scroll to Apply and select Go. To set units individually, scroll to each measurement type in the Units submenu and set to the desired units. Units can also be set in the Settings menu for each measurement.

Altimeter and Barometer

The Kestrel employs a stable, accurate pressure sensor to measure station pressure, the unadjusted air pressure in your location.

  • To use your Kestrel to measure barometric pressure (station pressure adjusted for local elevation), you must enter a correct reference value for your altitude. Accurate barometric readings require that no elevation changes be made while taking measurements.
  • To use your Kestrel to measure altitude changes (changes in station pressure associated with changes in elevation), you must enter a correct reference value for your starting barometric pressure. Accurate altitude readings depend on stable, weather related barometric air pressure while measurements are taken.
  • Synched values between the Altitude and Barometer measurement screens allow reference value updates on either screen to automatically update reference values on the other. You cannot use your Kestrel as a barometer and altimeter simultaneously.

Setting reference values on Baro measurement screen:

  • Scroll to the Baro measurement screen and select Settings.
  • Adjust either the Altitude or the Barometric Pressure value to a local, known value obtained from a mapping reference, GPS, or accurate weather station in the same location.

Setting reference values on altitude measurement screen:

  • Scroll to the ALTITUDE measurement screen and select Settings.
  • Adjust either the Altitude or the Barometric Pressure value to a local, known value obtained from a mapping reference, GPS, or accurate weather station in the same location.

Note! You should enter new reference values whenever you are using the Altimeter or Barometer functions and your location or the weather conditions have changed.

Note! You do NOT need to enter Altimeter or Barometer reference values to obtain accurate ballistics targeting solutions. The ballistics calculator employs the station pressure.

Creating Gun & Bullet Profiles

Note! Unless specified, all ballistics related functions are to be accessed with the Kestrel in Ballistics Mode. Features found in Easy Mode are called out specifically.

For ease of access, the ballistics Targeting Screen also contains the Ballistics Menu. Simply scroll down from the Targeting Screen to access these settings and submenus:

  • Target
  • Wind
  • Gun
  • Environment
  • Range Card (Elite Model only)
  • Multi Target (Elite Model only)
  • Ballistics (Limited on 5700 model, full on Elite model)
  • Manage Guns

Note! The back of this guide contains a full Glossary of the terms used. Please read these definitions!

CREATE OR EDIT A GUN PROFILE:

  • Scroll to and select Manage Guns. Either select an existing gun to edit or select New Gun.
  • Scroll up and select Gun to rename the gun. Use the scroll/adjust buttons to enter a new name, then exit the naming menu.
  • Set the remaining values in the Gun sub menu to match your gun, bullet and scope combination.
  • Exit to the Manage Guns menu and ensure the new gun is set to On.

Creating Targets

Edit Target

  • Scroll to and select Tgt.
  • Set range, angle, target speed, and wind values to match your target.

Edit Target or Create Additional Targets (Elite model only)

  • Scroll to and select Tgt.
  • Set range, angle, target speed, and wind values to match your target.
    The Elite model allows up to ten targets (A TO J).
  • Make sure Target is set to Active.
  • To enable more than one target, or edit other active targets, scroll up to the header named Target and use the left/right buttons to scroll between targets (A through J). Set a target to Active to enable it, then edit its values.
  • When only one target is active, its range can also be modified directly from the main Targeting Screen by highlighting Tgt and scrolling left or right.
  • If more than one target is set to Active, highlighting Tgt in the main Targeting screen and scrolling left or right will scroll between active targets.

Measuring Wind

An accurate crosswind measurement requires that the Kestrel “know” both the direction of fire and the wind direction and strength. You may use the Kestrel’s built-in compass and wind measuring and averaging features to capture these values:

Capturing the Direction of Fire:

  • Select Tgt to enter the Target menu, scroll down and select DoF, then scroll down and select Capture.
  • Follow the on-screen instructions:
    • While holding the Kestrel vertical, point the back of the unit directly towards the target and select Capture.
  • DoF will automatically be populated in the Target menu.

Capturing the Wind Inputs:

  • In the Target menu, scroll down and select WD, WS1, or WS2.
  • Scroll down and select Capture.
  • Follow the on-screen instructions:
    • While holding the Kestrel vertical, point the back of the unit directly into the wind and select Capture.
    • Continue to point the Kestrel into the wind for at least 5 seconds to capture a rolling 5 second average and peak value of the winds. Select End Capture.
  • WD, WS1, WS2 will automatically be populated in the Target menu.

Note! Selecting Wind in the Ballistics Menu jumps directly to the WD, WS1, WS2 entries in the Target Menu.

Note! For maximum accuracy of compass readings when capturing DoF and Wind, the Kestrel must be held as vertically as possible – be careful not to tilt it away from you while taking readings.

Note! Any time you are using the Kestrel to calculate an elevation hold (including when calibrating muzzle velocity and DSF) a direction of fire plus wind direction and speeds must be input. These inputs contribute to an accurate elevation solution.

Calibrating Muzzle Velocity

The Muzzle Velocity Calibration function allows you to obtain a more accurate muzzle velocity by combining user input data and actual shot results and calculating the actual bullet speed.

Calibrating Muzzle Velocity

  • Scroll to and select Gun in the Ballistics Menu.
  • After accurately inputting all other gun, bullet, and scope parameters, as well as wind values and direction of fire, scroll to MV and adjust to your best estimate of your gun’s muzzle velocity.
  • Select MV to enter the MV sub menu. Scroll to and select Cal MV.
  • The Cal MV range is the suggested target distance at which to calibrate. For best results, find a range where you can shoot to between 85% and 100% of the recommended range but no further. Calibrating at less than 85% of the recommended range will lessen accuracy at distances near the transonic boundary. If a target beyond 85% of the recommended range is not available, calibrating at a shorter distance should be accurate out to the distance used for calibration but a new MV Calibration should be performed if shooting beyond the calibration distance.
  • Adjust Range to match the actual distance to your target where you are shooting. Accuracy here is key! Use a quality ranger finder or confirm your range using the best method available.
  • Apply the suggested elevation hold shown in Drop in your scope turrets or reticle.
  • Take a number of shots to determine the actual bullet drop. Adjust Drop to match the actual observed bullet drop of the bullet at that range. For example, if the point of impact is 1.5 Mils below the bullseye adjust the Drop value to be 1.5 Mils greater.
  • A new MV will be calculated to match the actual impact of your round. (In this example, the MV will be decreased.) No chronograph required!
  • A (+) or (-) in front of the MV value indicates the new MV has been calibrated up or down.
  • Exit to accept the new MV value.

Note! The suggested MV Cal range is the distance where the bullet slows to Mach 1.2. If the suggested range cannot be matched it is better to shoot at a shorter/closer distance rather than further. However, as the MV calibration range decreases, so does MV calibration accuracy. Try to shoot as close to the recommended MV Cal range as possible.

Note! If the MV-Temp table has been populated, MV values will be locked by the MV-Temp table and MV values will not be automatically adjusted by the MV Cal procedure above.

Using Cal MV Guide

In the MV sub menu, below Cal MV, is the Cal MV Guide tool. This tool provides the user with step by step guidance through the MV Calibration process to ensure muzzle velocity is calibrated as accurately as possible. If used correctly, both the Cal MV and Cal MV Guide tool should produce the same result.

Calibrating Drop Scale Factor (Elite Models Only)

The Drop Scale Factor (DSF) function allows you to calibrate the BC of your round beyond the supersonic range of the bullet and maintain accurate solutions out to transonic and subsonic ranges. DSF calibration does not impact the supersonic flight path of the bullet.

Calibrating DSF

  • Scroll to and select Gun in the Ballistics Menu.
  • After accurately inputting all other gun, bullet, and scope parameters, as well as MV, wind values and direction of fire, scroll to and select CAL DSF.
  • The Cal DSF range is the suggested target distance at which to calibrate beyond. (Not closer than, as with MV Calibration). The suggested range shown when performing a Cal DSF for the first time corresponds with a bullet velocity of Mach 0.9. Subsequent uses of Cal DSF will provide a suggested ranges corresponding to a Mach value which is slower than the Mach value used in the previous DSF Calibration.
  • Adjust Range to match the actual distance to your target where you are shooting. Accuracy here is key! Use a quality ranger finder or confirm your range using the best method available.
  • Apply the suggested elevation hold shown in Drop in your scope turrets or reticle.
  • Take a number of shots to determine the actual bullet drop. Adjust Drop to match the actual observed bullet drop of the bullet at that range. For example, if the point of impact is 1.5 Mils below the bullseye, adjust the Drop value to be 1.5 Mils greater.
  • A new DSF value will be calculated to match the actual impact of your round in the transonic or subsonic range.
  • A (+) or (-) in front of the DSF value indicates the DSF value has been calibrated up or down. A DSF value of 1 indicates no change to BC in the transonic or subsonic range.
  • Exit to accept the new DSF value.
  • Up to 6 DSF values can be created to calibrate BC through the transonic and subsonic range. Calibrating DSF one time can create more than one DSF Cal value.
  • All DSF values can be viewed and deleted in View DSF.

Note! Entering DSF values at a shorter range than any previously entered DSF values will overwrite the longer range values.

Environment

Accurate Temperature, Humidity and Pressure measurements are critical to calculating an accurate Targeting Solution. It is important that the values measured by the Kestrel represent the ambient values, and for this the Kestrel needs continuous airflow over its sensors. When using a Kestrel in a position where airflow could be restricted, such as low to the ground or resting on a shooting mat or rock, it is better to make periodic environmental captures to avoid inaccurate measurements.

How to Capture Environmental measurements

  • In the Ballistics Menu, scroll to Enviro.
  • Adjust Enviro to Live and then wave the Kestrel rapidly through the air for 5-10 seconds. Next check the temperature shown and wave the Kestrel again. Repeat until the temperature value stops changing. If the area allows, and your lanyard is secure, you may also spin the Kestrel around by the lanyard to increase airflow over the sensors and measure ambient temperature as fast as possible.
  • Once the temperature value stops changing, immediately adjust Enviro back to Lock to fix the environmental measurements you have just captured.

NOTE! Repeat this process every half hour or any time the temperature or pressure changes significantly.

How to Set the Latitude

Latitude is necessary for accurate Coriolis calculations.

  • In the Ballistics Menu, scroll to and select Enviro then scroll to Lat.
  • Adjust Lat to match your local latitude.

NOTE! Latitude default is the middle of North America if no new value is entered. Setting both DoF and Lat to 0 will effectively turn Coriolis correction off.

Continuous Wind Capture

As an alternative to the Wind Capture method described previously, you may mount your Kestrel on a tripod using the Kestrel Vane Mount. The Vane Mount ensures the Kestrel remains oriented into the wind and allows for continuous update of the windage solution. For convenience, this method works best when the firing solution is being displayed on a mobile device using Kestrel LiNK Ballistics.

How to Set the Kestrel to Continuous Wind Capture

  • Select the correct Gun and Target and set the Direction of Fire.
  • In the Ballistics Menu, highlight Wind and press the red Capture button. An arrow will appear next to the Wind menu item to indicate the unit is now in wind capture mode.
  • While in wind capture mode, manual inputs to the unit will be locked and changes in wind speed or direction will automatically update the Targeting Screen Windage solution.
  • To close wind capture press the red Capture button again.

Multi Target (Elite Models Only)

Kestrel Elite units hold target data such as range direction of fire, inclination angle and wind values for 10 separate targets. Multi Target is a tool for inputting target data and then viewing solutions for all 10 targets quickly.

How to Use Multi Target

  • In the main ballistics menu, scroll to Multi Target and press Select.
  • Scroll up or down to view the 10 different target solutions. Scrolling left or right will change the solution data shown.
  • To input target data, enter the Multi Target sub menu by pressing Select while the Multi Target screen is showing.
  • To input target range, direction of fire (DoF) or inclination angle (Ideg), highlight Target Inputs and press select.
    • The first option is to capture one direction of fire and apply it to all targets. This is used if all targets are in roughly the same direction and exact accuracy is not essential. After pressing select, follow the on screen instructions and point the back of the unit at the targets and then press Select to capture the DoF value shown.
    • If a unique DoF is desired for each target, scroll down to the target and press the capture button twice to capture the DoF for that target.
    • Target range can be input by highlighting the desired target and scrolling left or right till the correct target range is shown.
    • Ideg and target speed can be input by highlighting the desired target and pressing select to enter that target’s submenu where Ideg and TS values can be input.
    • If using a LiNK connected range finder, simply highlight the desired target and range the target to input any values the range finder can measure.
  • To input wind information highlight Wind Inputs and press select.
    • The first option is to capture values for WD, WS1 and WS2 and apply them to all targets. This is used if the wind profile for all targets is roughly similar. After pressing select, hold the back of the Kestrel into the wind and after measuring at least 5 seconds of representative wind, press select to end the capture.
    • Next you may edit any of the wind values captured, In case you want to alter wind values according to what you can see down range, or accept them by pressing select to continue. These values will then be applied to all 10 targets. While capturing, the wind direction value shown will be in relation to target A (or 1). Once Continue is pressed, the wind direction will be applied to each target in relation to that target’s direction of fire.
    • If a unique wind profile is desired for each target, scroll down to the desired target and press the capture button to start a wind capture. After measuring at least 5 seconds of representative wind, press he capture button again to end the capture.
  • The target designator (either ABC or 123) can be changed in the Multi Target sub menu by scrolling to Designator and toggling right or left.
  • To clear target data for all 10 targets, scroll to Clear All Tgts in the Multi target sub menu and press Select and then confirm your choice. This will reset Target Range to the selected gun’s zero range, DoF to 12:00 and Ideg, TS, WD, WS1 and WS2 to zero.

Weather Glossary

DIRECTION - Compass heading in true or magnetic North.

WIND SPD - Wind Speed is the measurement of the wind passing through the impeller. For greatest accuracy, point the back of the Kestrel directly into the wind.

CROSWND - Crosswind uses the internal compass and a user selected heading to calculate the crosswind component of the full wind.

HEADWND - Headwind uses the internal compass and a user selected heading or target direction to calculate the headwind component of the full wind.

TEMP - Ambient Temperature is the temperature measured at the thermistor. For best results, ensure the thermistor is not exposed to direct sunlight and is exposed to good airflow.

CHILL - Wind Chill is a calculated value of the perceived temperature based on temperature and wind speed.

HUMIDITY - Relative Humidity is the amount of moisture currently held by the air as a percentage of the total possible moisture that the air could hold.

HEAT INDEX - Heat Index is a calculated value of the perceived temperature based on temperature and relative humidity.

DEW POINT - Dew Point is the temperature at which water vapor will begin to condense out of the air.

WET BULB - Wet Bulb is the lowest temperature that can be reached in the existing environment by cooling through evaporation. Wet Bulb is always equal to or lower than ambient temperature.

BARO - Barometric Pressure is the local station (or absolute) pressure adjusted to mean pressure. An accurate reading depends on a correct altitude input and unchanging altitude while measuring.

ALTITUDE - Altitude is the vertical distance associated with given atmospheric pressure. An accurate reading depends on correct initial barometric pressure input and stable barometric pressure while measuring.

STATION - Station Pressure (Absolute Pressure) is the pressure exerted by the atmosphere at the location.

DENS ALT - Density Altitude is the altitude at which the density of the theoretical standard atmospheric conditions (ISA) would match the actual local air density.

Target Menu

Active - Setting a target to active makes it selectable in the main target screen.(Not available in 5700 models)

TR - Target Range is the distance from the muzzle of the rifle to the target.

DoF - Direction of fire is the direction from the position of the shooter to the target.

Ideg - Inclination is the angle above or below horizontal from the position of the shooter to the target.

Icos - Inclination Cosine is the cosine of the angle above or below horizontal from the position of the shooter to the target.

TS - Target Speed is the speed of the target perpendicular to the direction of fire.

TD - Target Direction is the direction of travel of the target perpendicular to the direction of fire.

WD - Wind Direction is the direction the wind is coming from in relation to the direction of fire.

WS1 - Wind Speed 1 is a five second rolling average wind speed.

WS2 - Wind Speed 2 is a five second rolling maximum wind speed.

Gun Menu

MV - Muzzle Velocity is the speed of the bullet as it leaves the muzzle. MV can be measured with a chronograph or calculated using the MV Cal function. An MV estimate is often provided by cartridge manufacturers or in reloading manuals.

DM - A Drag Model is the known aerodynamic drag profile of a standard projectile against which an actual bullet is referenced. Ballistics coefficients based on G1 drag models are more widely available, ballistic coefficients based on G7 drag models are more representative of a typical hollow tip, boat tail bullet. (Applied Ballistics Custom

Drag Models - Using one of the Applied Ballistics custom drag models replaces the use of a standard projectile drag model and its associated BC. When a custom drag model is used, the BC value appears as a 1. Applied Ballistics custom drag models can only be used in Elite units.)

BC - A Ballistic Coefficient is a ratio that represents the ability of the bullet to overcome air resistance and maintain velocity while in flight in comparison to a standard projectile. Be sure to match the G1/G7 drag model setting to the BC value you are using. G1 BCs cannot be used with G7 drag models and vice-versa.

BW - Bullet Weight is the weight of the bullet measured in grains or grams.

BD - Bullet Diameter is the diameter of the bullet measured in inches or millimeters. (Note! Ensure bullet diameter is correct. The given name of a bullet’s caliber does not always match its actual diameter, for example 300WM is actually .308”, not .300”)

BL - Bullet Length is the length of the bullet measured in inches or millimeters. BL can be automatically calculated from bullet diameter by turning Auto Calc to ON in the BL sub menu. BL is found in the Bullet Diameter sub menu.

ZR - Zero Range is the distance from the muzzle to the target at which the rifle was zeroed.

BH - Bore Height (Scope Height) is the distance from the center axis of the rifle barrel to the center axis of the scope. This can be measured from the center of the bolt to the middle of the windage turret.

ZH - Zero Height is an adjustment designed to account for temporary changes to your gun setup that shift the point of impact in a vertical direction. Examples include the addition of a suppressor, night vision optic or change in load. For example, if adding a suppressor changes the point of impact by shifting it down 2 inches at your Zero Range, set ZH to -2. When the suppressor is removed, simply reset ZH to 0. A change in point of impact up is positive, down is negative. (Not available in 5700 models)

ZO - Zero Offset is the same as Zero Height but for the horizontal direction. If adding a suppressor changes the point of impact by shifting it left 1 inch at your Zero Range, set ZO to -1 in. A change in point of impact to the right is positive, left is negative. (Not available in 5700 models)

RT - Rifle Twist is the distance it takes for the rifling of your barrel to make one full rotation. RT is often provided by the gun or barrel manufacturer. It can also be measured by marking a tight fitting cleaning rod and measuring the insertion distance required to make one full rotation.

RTd - Rifle Twist Direction is the rotational direction of the rifle twist. A right hand twist (most common) is clockwise from behind the rifle.

Eunit - Elevation Unit is the unit of measure used in a scope and reticle for elevation and can be changed to Mil, TMOA, SMOA, inches or centimeters.

Wunit - Windage Unit is the unit of measure used in a scope and reticle for windage, and can be changed to Mil, TMOA, SMOA, inches or centimeters.

Eclck - Elevation Clicks is a user settable ratio of the number of clicks of the elevation turret required to adjust the point of aim one Mil, TMOA or SMOA. The Eclck value can be set in the Eunit sub menu when clik is selected as the Eunit.

Wclck - Windage Clicks is a user settable ratio of the number of clicks of the elevation turret required to adjust the point of aim one Mil, TMOA or SMOA. The Wclck value can be set in the Wunit sub menu when clik is selected as the Wunit.

DSF - Drop Scale Factor is a ballistic coefficient truing feature applied at transonic and subsonic speeds. (Not available in 5700 models)

TMOA - True Minute of Angle is a measure of one actual minute of angle. 1 TMOA = 1.047” at 100 yards. Most MOA scopes are TMOA.

SMOA - Shooters Minute Of Angle is a simplified approximation of one minute of angle where 1 SMOA = 1” at 100 yards.

Mil - Milliradian is a measure of angle using the USMC definition of 6283 mils = 1 circle, or 1 mil = 3.438 MOA.

CLIK - Click is the value of each click of the turret. The user must input the number of clicks needed to adjust the point of aim one TMOA, SMOA, or Mil, based on the turrets of their scope.

Environment Menu

Enviro - Setting Enviro to Live updates the ballistic solver with current sensor data for temperature, pressure, and relative humidity once every second. Selecting Lock for Enviro captures the current environmental inputs and makes them user editable.

Lat - Latitude. This input can be found on a map or internet search for your area.

Temp - Ambient Temperature is the temperature measured at the external temperature sensor.

SP - Station Pressure (Absolute Pressure) is the pressure exerted by the earth’s atmosphere at the sensor location.

RH - Relative Humidity is the amount of moisture currently held by the air as a percentage of the total possible moisture that the air could hold at the current temperature.

Dalt - Density Altitude is the altitude at which the density of the theoretical standard atmospheric conditions (ISA) would match the actual local air density.

SpnDft - Spin Drift is a correction for lateral drift caused by the change to the bullets axis of rotation as it follows the arc of its trajectory.

Wcap - Wind Capture toggles between applying the wind values captured to just the currently selected target or to all targets.

Ballistics/Range Card/Multi Target Menu

Range Card and Multi Target are available on Elite Model only.

Range - Range is the distance to target

Elv - Elevation is the vertical correction needed to hit a target at a given range.

Wnd1 - Windage 1 is the horizontal correction needed to hit a target at a given range and average measured wind speed.

Wnd2 - Windage 2 is the horizontal correction needed to hit a target at a given range and maximum measured wind speed.

Lead - Lead is the horizontal correction needed to hit a target moving left or right at a given speed and must be added or subtracted to the windage solution depending on the targets direction of motion.

RemV - Remaining Velocity is the amount of a bullet’s initial velocity retained at a given distance. Transonic speeds are indicated by a small dot. Subsonic speeds are indicated by a large dot.

RemE - Remaining Energy is the amount of a bullets initial energy retained at a given distance.

Rtrns - Transonic Range is the distance traveled by the bullet before it slows to transonic speed (Mach 1.2).

Trce - Trace is the height above the Elevation solution where the trace of the bullet will be most visible. (Trace value shown in Range Card is optimized for calculation speed and may differ slightly from Trace value in Ballistics Menu which is optimized for accuracy.)

vCor - Vertical Coriolis Correction is the amount of the elevation solution attributed to the Coriolis effect.

hCor - Horizontal Coriolis Correction is the amount of the windage solution attributed to the Coriolis effect.

SpnD - Spin Drift is the amount of the windage solution attributed to the spin drift.

AerJ - Aerodynamic Jump is the amount of the elevation solution attributed to aerodynamic jump.

ToF - Time of Flight is the time required for a bullet to reach its target at a given range.

MaxO - Max Ordinate is the highest point in the bullet’s trajectory above the height it was fired from.

Dro - Drop is the total drop the bullet experiences from its highest point in flight.

Rsub - Subsonic is the distance traveled by the bullet before it slows to subsonic speed (

Impeller Replacement

Note! Press only the sides of the impeller when removing and inserting to avoid damaging the precision hub bearing. [Figure 1]

  • Press FIRMLY on the impeller module to remove it.
  • Insert the new impeller so the side that has the small triangle (close to the perimeter) faces the front of the Kestrel when installed.
  • Orient one "arm"" of the module straight up. [Figure 2]. The impeller can be pushed in from either side.
... Read more

This video series will walk you through setting up your Kestrel Ballistics meter. If you still have any questions or issues, please contact The Kestrel Support team.

How to #1: Install the Battery

In this tutorial, we go over how to install the battery and get your new Kestrel ballistics meter up and running

How to #2: Callibrate the Compass

Calibrating the compass is easy to do, as shown in this video.

How to #3: Set Latitude

How to set the latitude to your current location.

How to #4: Create a Gun Profile

How to create a gun profile on your Kestrel Ballistics meter.

How to #6: Capture Environmental Data

Capturing environmental data is what a Kestrel meter does best. Here is how you do it.

How to #7: Vane Mount Applications

In this video, you learn how to assemble the vane mount and how the vane mount enhances your Kestrel Ballistics meter.

How to #8: Calibrate Muzzle Velocity and DSF

How to calibrate muzzle velocity and drop scale factor (DSF).

How to #9: Advanced Features

Find out about some of the advanced features in a Kestrel Ballistics meter.

... Read more

Kestrel 5 Series Instruction Manuals

Air Flow Diagram

Recommended Modifications to Athletic Participation Based on the Heat Index

Recommended Modifications to Athletic Participation Based on the Heat Index Celcuis

Get help connecting my Kestrel 5 series unit to my computer using a bluetooth dongle.

User Guide for the Kestrel 5000, 5100 and 5200

03/17/17

Kestrel 5000AG Livestock Environmental Meter & Kestrel 5400AG Cattle Leat Stress Tracker User Guide

Kestrel 5400 Heat Stress Tracker User Guide

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

User Guide for the Kestrel 5500 Weather Meter


Kestrel 5 Series Instruction Manuals (Ballistics)

Applied Ballistics Help Files

Getting Started With your Kestrel Ballistics Product

A 10 step guide to setup your Kestrel to work with your gun.

How to transfer gun profiles from 4500 series to 5000series

Get started with your Kestrel 5700 and this Easy Mode Quick Start guide.

Get started with your Kestrel 5700 Elite and this Easy Mode Quick Start guide.

Kestrel Companion App Instructions

The driver needed to connect your kestrel to your computer via USB.

Updating your Horus Firmware 4.93

Kestrel Elite & Sportsman Weather Meters with Applied Ballistics User Guide

sources of inaccuracy in long-range shooting


Kestrel 5 Series Downloads

ACSM - Acclimatized WBGT Guidelines Heat illness and what to do

Factory_Calibration_Temp_Example

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.

Step by step support Guide to transfer your Applied Ballistics Gun Profiles from a 4000 series Kestrel to a 5000 series Kestrel

Version 1.15

Kestrel Firmware Version 1.13 Update Installer for OSX

Kestrel Firmware Version 1.15 Update Installer for Windows

Korey Stringer Small Price of Survival Article 2016-09 Regarding Heat Stress

nist-calibration-wind-speed-example

Sample NIST Certification Air Speed

Sample NIST Certification Globe Temperature

Sample NIST Certification Pressure

Sample NIST Certification Relative Humidity

Sample NIST Certification Temperature

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

Tune_Up_Example_1

wind measurement and long-range shooting, SME NVDOC1403-Wind


Kestrel 5 Series Troubleshooting Documents

Air Flow Diagram

Connecting my Kestrel using Bluetooth for Windows 8

Connecting your Kestrel to a PC Bluetooth Tutorial


Support Documents for all Kestrels

Replacing the Kestrel Impeller

Fine Dead Fuel Moisture and Probability of Ignition Tables

Kestrel 5 Series Certificates of Comformity

Kestrel 5 Series specification chart

Kestrel 5400 Heat Stress Tracker specification chart

... Read more

LiNK (Kestrel)

Instructions for the use of the Kestrel LiNK App

... Read more

You can find all the information regarding the warranty on your Kestrel by Clicking here

... Read more
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.

Kestrel 5 Series Downloads

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.

Kestrel 5 Series Downloads

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

... Read more

If you are getting NaN shown as a solution, then you have a bad value in your gun profile. For instance, the bullet length is set to 0.000. This also confirms that you have an older version of the firmware as later versions will check for these conditions before loading the gun on the unit. Check your profile and update your firmware to resolve this issue. If you are getting Bad Enviro as a solution, then there is an issue with one of the sensors. If the issue persists, then there might be a sensor failure. The best course of action is to fill out a Kestrel Service request and send it in.

... 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.

... Read more

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


LiNK (Kestrel)

Kestrel LiNK Version 1.04.03 for Windows


LiNK (Kestrel)

Kestrel LiNK Version 1.04.03 for OSX


LiNK (Kestrel)

An iOS application to view you Kestrel Ballistics data.


LiNK (Kestrel)

Download the Kestrel LiNK Ballistics app from the google play store.


To UPGRADE your firmware (e.g., go from a Kestrel 5700 or 5 Series Sportsman to a Kestrel 5700 Elite), you will need to purchase the firmware upgrade file and install using your Kestrel LiNK software. ... Read more

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.


... Read more

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.

... Read more

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.

... Read more

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.

... Read more

57005700 Elite
Performance Features
G1/G7 Drag Models in Mil, TMOA, SMOA, in, cm, ClicksXX
Corrects for Wind, Temp, & Altitude ChangesXX
LiNK Connectivity (Bluetooth Low Energy)XX
Easy ModeXX
MV Calibration & Muzzle VelocityXX
Range Card X
Gun Profile Storage3 Guns30 Guns
Targets110
Subsonic Range Truing (Drop Scale Factor) X
Multi Target Screen X
Applied Ballistics Custom Curves X
Utility Features
Aerodynamic Cross Wind JumpXX
CoriolisXX
Spin Drift CorrectionXX
MV Temp TableXX
Target Lead CalculatorXX
Target Speed EstimatorXX
Target Range EstimatorXX
5500 yd Max Range X
Zero Offset X

... Read more

Yes. You can purchase an upgrade from the website and a file will be emailed to you that will allow you to remotely upgrade your unit. The upgrade needs to be done on a Windows or MacOS computer, however, customers can choose between a Bluetooth dongle and USB cable depending on preferred connection method.

You can purchase the upgrade here: Kestrel 5700 to Kestrel Elite upgrade

... Read more

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

Yes. You can always trade-in an older Kestrel, regardless of its condition, by using our Customer Trade-In Program.

... Read more

The Kestrel 5 Series models can store over 10,000 data sets.

... 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.

... Read more

Please see our guide for this Bluetooth issue:

Kestrel 5 Series Instruction Manuals

Get help connecting my Kestrel 5 series unit to my computer using a bluetooth dongle.

... Read more

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

Berry compliant means that any of the textiles used in the product are sourced and made in the U.S.A.

... Read more

For Applied Ballistics and HORUS, the ballistics calculator will ALWAYS use station pressure despite the altitude number that is entered.

  • If you want station pressure, set your reference altitude to ZERO.
  • If you want your altitude to display correctly and have station pressure, you will need to enter your current barometric pressure as the reference barometric pressure. The reference altitude should remain ZERO, and Sync Alt should be OFF.
... 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

For overall setting up profiles and using the Kestrel please see the following document:

Kestrel 5 Series Instruction Manuals (Ballistics)

A 10 step guide to setup your Kestrel to work with your gun.

... Read more

Any of the LiNK Ballistics applications will allow you to transfer gun profiles to your Kestrel. So LiNK Ballistics for iOS or LiNK Ballistics for Android will allow you to use a mobile device to transfer gun profiles but you would need to have the LiNK (i.e., Bluetooth) model. If you are using a Windows computer, you can use the Applied Ballistic Profile Loader (Version 42 or higher).

NOTE : Please be aware that currently the Applied Ballistics Profile Loader cannot be used with Bluetooth; therefore you will need to purchase the USB Transfer cable to transfer files with a Windows PC.

... Read more

Unfortunately we do not have a ballistics application that runs on a MAC.

... Read more

The free Kestrel LiNK Ballistics app for Android and iOS is the ideal companion to the Kestrel 5 Series Sportsman, Kestrel 5700 Ballistics Weather Meter, and Kestrel Elite Weather Meter with Applied Ballistics. Build and manage your gun/bullet profiles and download them to your Kestrel Ballistics unit before you set out. The app is also the perfect way to display your ballistic solutions remotely via Bluetooth.

... Read more

We have separate LiNK applications without “Ballistics” in the title. The programs handle uploading the weather data from the Kestrel to a specific device. This weather data can then be exported to MS Excel. You can also update your firmware or upgrade your unit (upgrade through Windows only) with these programs.

... Read more

Currently mobile devices cannot perform firmware upgrades. An upgrade is defined as going from a 5 Series Kestrel Sportsman or Kestrel 5700 to a Kestrel 5700 Elite with Applied Ballistics. To upgrade your Kestrel Sportsman or Kestrel 5700, you will need to connect to a Windows or MAC computer. More info can be found on the Kestrel Upgrade packages.

... Read more

Currently these are the integrated LRF that work with the Kestrel 5700 LiNK series:

  • Bushnell Elite 1-Mile CONX
  • Safran Vectronix PLRF 25C
  • Steiner Defense M830r LRF 1535nm Binoculars
  • Safran Optics 1 I-CUGR Integrated Compact Ultralight Gun-Mounted
  • Newcon Optik Spotter
  • Wilcox RAPTAR-S
  • And more to come…
... Read more

View this informative video, for connecting Bushnell CONX to Kestrel. NOTE:  If you are holding down the laser button on the rangefinder, the rangefinder will ignore any commands from the Kestrel. You will need to release the button on the rangefinder in order for the two devices to communicate.

... Read more

You should always calibrate your Muzzle Velocity on the Kestrel because it accommodates for any errors. The suggested BCs are not always correct. We have seen a lot of muzzle velocity errors even with well chronographed MVs. Truing bends the algorithm to perfectly match the bullet’s flight path. Instead of hoping the prediction works, truing perfectly matches the flight path. For example, the ballistic solver expects different muzzle velocities depending on if you are using the G1 or G7 BC. However the chronograph is just measuring the actual muzzle velocity coming out of the barrel, independent of an BCs being used. Truing your Muzzle Velocity using CAL MV will always get you the proper MV to enter into the Kestrel so that your solutions are always on target.

... Read more

There is no need to input the tapered base into the Kestrel.  If you measure scope height at the bell of the scope, the most your error will be is 1 – 2 clicks at 1000 yards. This can be offset by measuring to the center of the windage turret instead of the bell of the scope.  It is more likely that the scope click errors will do more harm than this will. Here is some reading that might help: http://www.longrangehunting.com/forums/f19/applied-ballistics-faq-167008/.

... Read more

Our article Understanding Pressure, Altitude and Density Altitude talks about Altitude and Barometric Pressure in great detail. The article also describes how to utilize your Kestrel to take these measurements.

... Read more

Understanding how to properly set up your pressure and altitude for ballistic solutions depends on the Kestrel model and ballistic software application being used.

To view a comprehensive overview on pressure and altitude, and density altitude, visit our " Understanding Pressure, Altitude and Density Altitude " web page.

... Read more

Here is comprehensive overview courtesy of Todd Hodnett:


Kestrel 4 Series Instruction Manuals (Ballistics)

Overview of the setup and use of the Kestrell Shooter's Weather Meter with Applied Ballistics

... Read more

Kestrel 5 Series Downloads

wind measurement and long-range shooting, SME NVDOC1403-Wind

... Read more
... Read more

The free Kestrel LiNK Ballistics app is the perfect companion to the Kestrel Sportsman, Kestrel 5700 Ballistics Weather Meter, and Kestrel 5700 Elite Weather Meter with Applied Ballistics. Build and manage your gun/bullet profiles and download them to your Kestrel Ballistics Meter before you set out. At the range or match, secure your Kestrel Ballistics Meter to a tripod using the optional Kestrel Vane Mount and use the LiNK Ballistics app to quickly adjust the target range and view the shooting solution and wind rose without leaving your shooting position. It’s like having a meteorologist and ballistician standing next to you while you shoot.

Download Kestrel LiNK Ballistics for iOS:

LiNK (Kestrel)

An iOS application to view you Kestrel Ballistics data.


Quick Look

  • Wirelessly adjust the target range on your Kestrel and view resulting elevation and windage solution without ever leaving your shooting position.
  • Build and transfer custom gun/bullet profiles.
  • Comprehensive Applied Ballistics bullet library provides G1/G7 ballistics coefficients, weight, diameter and length data for over 500 bullets.
  • With Kestrel Elite Meters, also access and use Applied Ballistics Custom Drag Models, providing exact drag profiles for supersonic, transonic, and subsonic bullet flight for maximum accuracy at extreme long range.
  • Advanced Multi Target view allows you to simultaneously view the elevation and windage solution for up to 8 targets defined by direction, range and angle - giving you the edge at precision rifle matches (available for Kestrel Elite only).

Example Screen Shots


See elevation and windage solutions as well as wind speed and direction without leaving your shooting position. Changing Target Range in the app automatically updates the solution from the Kestrel remotely.

Input up to 8 separate target ranges to see elevation and windage solutions for each. Perfect for competition multi-target stages.

Create and manage gun and bullet profiles for easy upload to and from your Kestrel. Includes bullet data from the Applied Ballistics G1/G7 bullet library.


Kestrel Firmware:

Kestrel 5 Series Downloads

Version 1.15

Device Compatibility:

  • Firmware: iOS versions 9 and higher.
  • Hardware: iPhone 4s onward, iPad 3rd generation onward, iPod Touch 5th generation onward.

Kestrel Compatibility:

  • 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

The free Kestrel LiNK Ballistics app is the perfect companion to the Kestrel Sportsman, Kestrel 5700 Ballistics Weather Meter, and Kestrel 5700 Elite Weather Meter with Applied Ballistics. Build and manage your gun/bullet profiles and download them to your Kestrel Ballistics Meter before you set out. At the range or match, secure your Kestrel Ballistics Meter to a tripod using the optional Kestrel Vane Mount and use the LiNK Ballistics app to quickly adjust the target range and view the shooting solution and wind rose without leaving your shooting position. It’s like having a meteorologist and ballistician standing next to you while you shoot.

Download Kestrel LiNK Ballistics for Android:

LiNK (Kestrel)

Download the Kestrel LiNK Ballistics app from the google play store.


Quick Look

  • Wirelessly adjust the target range on your Kestrel and view resulting elevation and windage solution without ever leaving your shooting position.
  • Build and transfer custom gun/bullet profiles.
  • Comprehensive Applied Ballistics bullet library provides G1/G7 ballistics coefficients, weight, diameter and length data for over 500 bullets.
  • With Kestrel Elite Meters, also access and use Applied Ballistics Custom Drag Models, providing exact drag profiles for supersonic, transonic, and subsonic bullet flight for maximum accuracy at extreme long range.
  • Advanced Multi Target view allows you to simultaneously view the elevation and windage solution for up to 8 targets defined by direction, range and angle - giving you the edge at precision rifle matches (available for Kestrel Elite only).

Example Screen Shots


See elevation and windage solutions as well as wind speed and direction without leaving your shooting position. Changing Target Range in the app automatically updates the solution from the Kestrel remotely.

Input up to 8 separate target ranges to see elevation and windage solutions for each. Perfect for competition multi-target stages.

Create and manage gun and bullet profiles for easy upload to and from your Kestrel. Includes bullet data from the Applied Ballistics G1/G7 bullet library.


Kestrel Firmware:

Kestrel 5 Series Downloads

Version 1.15

Device Compatibility:

  • Firmware: Android 4.3 and higher.
  • Hardware: Most Android Devices with Bluetooth Smart®, including Samsung Galaxy, Nexus 4, Motorola Droid and other recent generation phones and tablets.

LiNK (Kestrel)

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

Kestrel Compatibility:

  • 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

The Kestrel LiNK App for iOS puts crucial information at your fingertips with remote mobile device viewing of real-time readings from your Kestrel 5 Series Meter or DROP Logger. Kestrel LiNK also provides easy transfer of the Kestrel’s stored data log, a clear graph of all historical data, and customizable alerts based on temperature, heat index, wind or other measurements. Data is transmitted wirelessly via Bluetooth Smart® up to 100’ line of sight or more.

Download Kestrel LiNK for iOS (Formerly Kestrel Connect):

LiNK (Kestrel)

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


Quick Look

  • Compatible with Kestrel 5 Series Weather Meters with LiNK and all Kestrel DROP Wireless Data Loggers.
  • View real-time measurements and download data logs from devices within range. LiNK for iOS can connect to up to 8 devices at the same time.
  • View and analyze logged data using range Min/Max/Average statistics and clear scrolling graphs.
  • Get alerts when conditions exceed thresholds you set in the app. (Note: Use of alerts feature reduces battery life of mobile device.)
  • Easily export and email selected data ranges or entire log in .csv format for record keeping and analysis.
  • Post snapshots of current conditions to social media with one click.
  • Manage your Kestrel's name, logging rate and other device settings.
  • Get alerted to available firmware updates for your Kestrel and install them wirelessly.
  • *New* Remote Monitoring – Set Alert Service on a local mobile device and receive emails from your DROP or Kestrel 5 Series whenever conditions go outside your preset threshold.

Example Screen Shots


Drag and drop your desired measurements to the real-time Dashboard. Share your Dashboard to social media.

See every current measurement from your Kestrel meter or DROP on the Readings screen.

New logged data is automatically added to the history in the app every time your device is within range. Scroll forward or back though all data to see all time-stamped measurements.

Bluetooth Smart makes it easy to make connections to devices within range from within the app.

Manage settings on your Kestrel 5 Meter or Kestrel DROP from within the app - alerts, name, connection settings. Install firmware updates..


Kestrel Firmware:

LiNK (Kestrel Ballistics)

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

Kestrel 5 Series Downloads

Version 1.15

Device Compatibility:

  • Firmware: iOS versions 6 and higher.
  • Hardware: iPhone 4s onward, iPad 3rd generation onward, iPod Touch 5th generation onward.

Kestrel Compatibility:

  • Kestrel DROP D1 Wireless Temperature Data Logger
  • Kestrel DROP D2 Wireless Temperature & Humidity Data Logger
  • Kestrel DROP D3 Wireless Temperature, Humidity and Pressure Data Logger
  • 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

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 1.04.03 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 1.15

Kestrel Firmware Version 1.13 Update Installer for OSX

Kestrel Firmware Version 1.15 Update Installer for Windows

Device Compatibility:

  • Firmware: Compatible with El Capitan

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

The Kestrel LiNK App for Android puts crucial information at your fingertips with remote mobile device viewing of real-time readings from your Kestrel 5 Series Meter or DROP Logger. Kestrel LiNK also provides easy transfer of the Kestrel’s stored data log, a clear graph of all historical data, and customizable alerts based on temperature, heat index, wind or other measurements. Data is transmitted wirelessly via Bluetooth Smart® up to 100’ line of sight or more.

Download Kestrel LiNK for Android

LiNK (Kestrel)

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


Quick Look

  • Compatible with Kestrel 5 Series Weather Meters with LiNK and all Kestrel DROP Wireless Data Loggers.
  • View real-time measurements and download data logs from devices within range. LiNK for Android can connect to one device at a time.
  • View and analyze logged data using range Min/Max/Average statistics and clear scrolling graphs.
  • Get alerts when conditions exceed thresholds you set in the app. (Note: Use of alerts feature reduces battery life of mobile device.)
  • Easily export and email selected data ranges or entire log in .csv format for record keeping and analysis.
  • Post snapshots of current conditions to social media with one click.
  • Manage your Kestrel's name, logging rate and other device settings.
  • Get alerted to available firmware updates for your Kestrel and install them wirelessly.
  • *New* Remote Monitoring – Set Alert Service on a local mobile device and receive emails from your DROP or Kestrel 5 Series whenever conditions go outside your preset threshold.

Example Screen Shots


Drag and drop your desired measurements to the real-time Dashboard. Share your Dashboard to social media.

See every current measurement from your Kestrel meter or DROP on the Readings screen.

Select data ranges to see Min/Max/Avg or export data.

New logged data is automatically added to the history in the app every time your device is within range. Scroll forward or back though all data to see all time-stamped measurements.

Bluetooth Smart makes it easy to make connections to devices within range from within the app.

Manage settings on your Kestrel 5 Meter or Kestrel DROP from within the app - alerts, name, connection settings. Install firmware updates..


Kestrel Firmware:

LiNK (Kestrel)

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

Kestrel 5 Series Downloads

Version 1.15

Device Compatibility:

  • Firmware: Android 4.3 and higher.
  • Hardware: Most Android devices with Bluetooth Smart®, including Samsung Galaxy, Nexus 4, Motorola Droid and other recent generation phones and tablets.

Kestrel Compatibility:

  • Kestrel DROP D1 Wireless Temperature Data Logger
  • Kestrel DROP D2 Wireless Temperature & Humidity Data Logger
  • Kestrel DROP D3 Wireless Temperature, Humidity and Pressure Data Logger
  • 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

Transfer data from your Kestrel 5 Series device and archive on your Windows 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 Windows:

LiNK (Kestrel)

Kestrel LiNK Version 1.04.03 for Windows


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 1.15

Kestrel Firmware Version 1.13 Update Installer for OSX

Kestrel Firmware Version 1.15 Update Installer for Windows

Device Compatibility:

  • Firmware: Compatible with El Capitan

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

Bluetooth Support:

LiNK (Kestrel)

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

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Every single Kestrel Meter and Kestrel DROP logger is factory tested to validate performance within specifications before it leaves our factory. We don’t rely on spot checks because we know you rely on your Kestrel to give you the accurate readings you need to stay safe, make decisions, and enjoy your activities. Each of our calibration standards is traceable to the National Institute of Standards and Technology (NIST), ensuring the highest level of reliability. Our wind/airflow standard is actually calibrated in the NIST laser doppler wind tunnel as this is the only lab in the country that can provide the calibration accuracy we require.

NK offers three types of calibration services to meet your accuracy validation needs. Each of these calibration services can be conveniently ordered through our website, allowing you to cross “Get my Kestrel calibrated” off your to-do list whenever convenient. And, ordering your calibration online creates an order history you can refer to in future. But, if you prefer, you can always call or chat with us during business hours to order your calibration. For more in-depth information about each of the services described below, simply click through to the relevant ordering page.

NIST Calibration Services

NIST Calibration is our most in-depth calibration service. The Kestrel’s measurements are compared to our NIST-traceable standard at two points after an appropriate equilibration period. The NIST Calibration Report and Certificate will show as found and as left values, standard values, acceptable range, and deviation. It will also list the date, serial number and model of the unit, desired recalibration interval, and test technician’s name and signature. NIST Calibration services can be added on to any new Kestrel purchase for customers who require it, or you may return your Kestrel to us at any time after purchase to validate its performance in detail. Please visit our Kestrel Calibration product for more information.

Factory Calibration Services

For Factory Calibration we repeat the tests performed on your unit when it was manufactured and provide a renewed Sensor Calibration Certificate confirming performance within specification, the serial number of the unit, and the signature of the testing agent. Please note that if you need more than one Factory Calibration, Tune-Ups offer a better value! Please visit our Kestrel Calibration product for more information.

Tune-Up Services

Tune-Ups include Factory Calibrations of all sensors on your unit as well as a new impeller, new battery, functional checks, cleaning and leak testing. Tune-Ups are priced at a flat $75 per unit so offer a great value if you need more than one Factory Calibration or just want to ensure your Kestrel is fully tested.

Note on Sensor Correction: If needed and available for the sensor in question, we will also restore your unit’s performance to specification by either replacing the impeller or correcting the sensor. Although not correctable, in our experience, both the temperature sensor (ambient and globe) and newer humidity sensor in the DROP and Kestrel 5 Series have proven extremely stable in performance. Every Kestrel is guaranteed to perform within specification, including the specified drift of the sensor in question, for Five Years from the date of manufacture or documented date of first customer purchase. If your Kestrel is under warranty and does not meet this standard under test, it will be repaired or replaced as covered under the terms of our Limited Warranty. If your Kestrel has an unrepairable problem and is no longer under warranty, you have the option of trading it in for a new or upgraded model under our Kestrel Trade-in, Trade-up Program. Please visit our Kestrel Tune-up product for more information.

Shipping Your Unit: After ordering a calibration or tune-up service online or via phone, please note your order number so you can add it to the outside of the box. Please pack your Kestrel securely and ship to:

Nielsen-Kellerman
21 Creek Circle
Boothwyn, PA 19061
Attn: ORDER####

You will also receive an email confirming these instructions. It is most important that we have your Order Number so we can promptly match your unit with your service request. You can also print your order confirmation and add it to the box.

Questions or clarifications about our calibration services? Email techsupport@nkhome.com or call (610) 447-1555.

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