Kestrel 5400 Heat Stress Tracker (Pro)
Starts atThe most effective, portable and user-friendly WBGT meter on the market. The 5400 series meters help to detect when heat-related conditions are unsafe well before your body does, audible and visual warnings report heat stress plus Wet Bulb Globe Temperature without the need for distilled water or a bulky globe.
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- Compare Kestrel
- Measures
- Software
- Description
- Additional information
- Features
- Specification
- Warranty
- Documentation
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| Functions / Model | 1000 | 2000 | 2500 | 3000 | 3500 | 3500 Delta T |
5000 | 5100 | 5200 | 5400 | 5500 | 2700 Ballistics |
5700 Ballistics |
5700 Elite AB |
5700 4DOF |
5700X Elite AB |
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| Price from(*) | £78.56 | £97.74 | £155.28 | £155.28 | £193.63 | £193.63 | £260.75 | £262.13 | £261.85 | £408.29 | £337.47 | £235.92 | — | — | — | — | |
| LiNK Model | — | — | — | — | — | — | £318.29 | £318.29 | £318.29 | £573.08 | £404.59 | — | £523.36 | £814.79 | £643.36 | £987.64 | |
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| Current Wind Speed |  |
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| Max Wind Gust | |
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| Avg Wind Speed | |
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| Temperature | |
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| Lanyard | |
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| Wind Chill | |
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| Backlit Display | |
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| Clock | |
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| Pressure Trend | |
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| Altitude | |
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| Barometric Pressure | |
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| Relative Humidity | |
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| Heat Index | |
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| Dew Point Temp | |
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| Wet Bulb Temp | |
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| Density Altitude | |
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| Absolute Pressure | |
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| Exportable Data Logs | |
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| Data Log Graphing | |
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| Air Density | |
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| Humidity Ratio | |
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| Evaporation Rate | |
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| Volume Air Flow | |
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| Delta T | |
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| Wet Bulb Globe Temp (WBGT) | |
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| Thermal Work Limit | |
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| Naturally Asp. Wet Bulb Temp | |
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| Globe Temp | |
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| Threshold Alerts | |
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| Built in Flag Settings | |
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| Digital Compass | |
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| Wind Direction | |
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| Crosswind | |
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| Headwind/Tailwind | |
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| Integrated Ballistics Calc | |
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| Enhanced Processor Speed | |
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| Adjustable Bluetooth Signal | |
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| Kestrel LiNK App (iOS) | |
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| Kestrel LiNK App (Android) | |
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| Kestrel LiNK for PC | |
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| Kestrel LiNK Ballistics (iOS) | |
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| Kestrel LiNK Ballistics (Android) | |
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* Prices exclude 20% VAT. UK mainland free delivery. For shipping within E.U. Please see our shipping terms
Kestrel 5400 Measures
• Globe Temperature
• Heat Stress Index
• Naturally Aspirated Wet Bulb Temperature
• Thermal Work Limit (TWL)
• Dew Point Temperature
• Relative Humidity
• Wind Speed
• Wind Direction (Pro with LiNK version only)
• Temperature / Wind Chill (Fahrenheit and Celsius)
• Station Pressure (Absolute Pressure)
• Barometric Pressure (inHg and hPa (mb))
• Altitude (Barometric)
• Density altitude
• Wet Bulb Temperature (Psychrometric)
• Wet Bulb Globe Temperature (WBGT)
Software Downloads
| Kestrel Link for Windows (v1.04.04) | |
| Simple communication to Windows computers is provided through the optional LiNK .USB Dongle or USB Data Transfer Cable. Download your data to view, analyze and archive. Enables firmware update of Kestrel 5 series meters.Compatible with Windows 7, Windows 8, Windows 8.1, and Windows 10 |
Download: Kestrel Link for Windows » |
| Kestrel Link for OSX/Mac OS (v1.04.04) | |
| 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 OSX/Mac OS » |
| Kestrel LiNK Ballistics for Android | |
| Wireless connection. When in range, view real-time measurements, receive on-screen alerts & download your data. Logged data can be viewed, analyzed, archived & shared via e-mail, Facebook & Twitter. Enables firmware update of Kestrel 5 series meters.NOTE: Range up to 100′ line of sight – reduced by walls and obstructions. |
Download: Android Store »  |
| Kestrel LiNK Ballistics for iOS | |
| Wireless connection. When in range, view real-time measurements, receive on-screen alerts and download your data. Logged data can be viewed, analyzed, archived and shared via e-mail, Facebook and Twitter. Enables firmware update of Kestrel 5 series meters.
NOTE: Range up to 100′ line of sight – reduced by walls and obstructions.
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Download: Apple Store »  |
Product Description
Kestrel 5400 Description
The Kestrel 5400 is a highly accurate handheld, portable, WBGT (Wet Bulb Globe Temperature) measurement device and environmental data logger. It requires no distilled water, bulky globes, complicated setup or expensive equipment. Simply hold or place the Kestrel 5400 at the location required and immediate and average WBGT data will be stored and displayed. You can set thresholds and will be made instantly aware if they are exceeded by a loud buzzer, bright LED beacon and on-screen warnings enabling you to manage dangerous conditions quickly and with accurate information at hand.
Uniquely the Kestrel 5400 is also a complete weather station measuring wind speed, maximum wind gusts, temperature, humidity, pressure, wind chill, density altitude and more, making the Kestrel 5400 the ideal product when determining safe working conditions, setting rest breaks and maximising personnel performance.
The Kestrel 5400 LiNK version can additionally track wind direction making it the ideal tool for HAZMAT response.
Additional information
| Variant | HST Non LiNK, HST Non LiNK with Vane Mount, HST PRO with LiNK + Compass + Vane Mount |
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Kestrel 5400 Features
• WBGT (Wet Bulb Globe Temperature)
• Does not require distilled water
• Large easily read high resolution, high contrast display with backlight
• Time & Date
• Customize screens to display user-selected measurements
• Graph & recall trends
• Min, Max & Average values
• Automatically store measurements, when powered on or off
• Manually store measurements with the press of a button
• Customizable data storage – 10,000 data points
• Data charting
• Optional LiNK connectivity powered by Bluetooth® low energy provides wireless communication to mobile devices and computers
• Data upload to iOS & Android phones & tablets
• Data upload to Windows or Mac computers with optional USB Data Cable
• Data upload to Windows & Mac computers via wireless Bluetooth (LiNK Enabled Meters only with the optional Kestrel Dongle)
• Standard user-replaceable AA Lithium Battery (Average Life 400 Hours)
• Drop tested to MIL-STD-810G standards (10 drops from 4′)
• Waterproof and dustproof (sealed to IP67 standards – 30′ submersion to 3′)
• Certificate of Conformity
• Neck Lanyard
• Patented Impeller and Sensor Technology (user-replaceable)
• Impeller cover allows use of other functions whilst protecting the impeller
• Waterproof & Floats
• Languages: English, French, Spanish, German & Italian
• 5 Year Warranty
| Sensor | Accuracy (+/-) | Resolution | Specification Range | Notes |
| Wind Speed | Air Flow | Larger of 3% of reading, least significant digit or 20 ft/min | 0.1 m/s 1 ft/min 0.1 km/h 0.1 mph 0.1 knots 1 B* 0.1 F/S* |
0.6 to 40.0 m/s 118 to 7,874 ft/min 2.2 to 144.0 km/h 1.3 to 89.5 mph 1.2 to 77.8 knots 0 to 12 B* 2-131.2* |
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% @ 5° off-axis; -2% @ 10°; -3% @ 15°. 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. *F/S only in Ballistics units. Beaufort not available in Ballistics units. |
| Ambient Temperature | 0.9 °F 0.5 °C |
0.1 °F 0.1 °C |
-20.0 to 158.0 °F -29.0 to 70.0 °C |
Airflow of 2.2 mph|1 m/s or greater provides fastest response and reduction of insolation effect. For greatest accuracy, avoid direct sunlight on the temperature sensor and prolonged sunlight exposure to the unit in low airflow conditions. Calibration drift is negligible for the life of the product. For further details, see Display & Battery Operational Temperature Limits |
| Relative Humidity | ±2%RH | 0.1 %RH | 10 to 90% 25°C non-condensing | To achieve stated accuracy, unit must be permitted to equilibrate to external temperature when exposed to large, rapid temperature changes and be kept out of direct sunlight. Calibration drift is typically less than ±0.25% per year. |
| Pressure | ±1.5 mbar at 25°C, 700-1100 mbar/ ±0.044inHg at 77°F 20.67-32.48 inHg/ ±0.022 PSI 10.15-15.95 PS |
0.01 inHg 0.1 hPa|mbar 0.01 PSI |
25°C/77°F, 700-1100 mbar/20.67-32.48 inHg/10.15-15.95 PSI |
Monolithic silicon piezoresistive pressure sensor with second-order temperature correction. Between 1100–1200 mbar, unit will operate with reduced accuracy. Sensor may not operate above 1200 mbar and can be damaged above 6,000 mbar or below 10 mbar. Calibration drift is negligible for the life of the product. |
| Compass | ±5° | 1° 1/16th Cardinal Scale |
0 to 360° | 2-axis solid-state magnetoresistive 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 Deployed |
| Air Density | 0.0002 lb/ft3 0.0033 kg/m3 |
0.001 lbs/ft3 0.001 kg/m3 |
Temperature Relative Humidity Pressure |
| Air Flow | 6.71% | 1 cfm 1 m3/hr 1 m3/m 0.1m3/s 1 L/s |
Air Flow User Input (Duct Shape & Size) |
| Altitude | typical: 23.6 ft/7.2 m – 50 to 1100 mBar max: 48.2 ft/14.7 m – 300 to 750 mBar |
1 ft 1 m |
Pressure User Input (Reference Pressure) |
| Barometric Pressure | 0.07 inHg 2.4 hPa|mbar 0.03 PSI |
0.01 inHg 0.1 hPa|mbar 0.01 PSI |
Pressure User Input (Reference Altitude) |
| Crosswind & Headwind / Tailwind | 7.1% | 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”) | .3gpp .4g/kg |
0.1 gpp 0.01 g/kg |
Temperature Relative Humidity Pressure |
| 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 |
| Wind Chill | 1.6 °F 0.9 °C |
0.1 °F 0.1 °C |
Wind Speed Temperature |
Additional Product Info
| Display & Backlight | Multifunction, multi-digit monochrome dot-matrix display. Choice of white or red LED backlight. |
| Response Time & Display Update | Display updates every 1 second. After exposure to large environmental changes, all sensors require an equilibration period to reach stated accuracy. Measurements employing RH may require longer periods particularly after prolonged exposure to very high or very low humidity. |
| 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 and WEEE compliant. Individually tested to NIST-traceable standards. |
| Origin | Designed and manufactured in the USA from US and imported components. Complies with Regional Value Content and Tariff Code Transformation requirements for NAFTA Preference Criterion B. |
| Battery Life | AA Lithium, included. Up to 400 hours of use, reduced by backlight or Bluetooth radio transmission use. |
| Shock Resistance | MIL-STD-810g, Transit Shock, Method 516.5 Procedure IV; unit only; impact may damage replaceable impeller. |
| Sealing | Waterproof (IP67 and NEMA-6) |
| Display & Battery Operational Temperature Limits | 14° F to 131° F | -10 °C to 55 °C Measurements may be taken beyond the limits of the operational temperature range of the display and batteries by maintaining the unit within the operational range and then exposing it to the more extreme environment for the minimum time necessary to take reading |
| Storage Temperature | -22.0 °F to 140.0 °F | -30.0 °C to 60.0 °C. |
| Size & Weight | 5.0 x 1.9 x 1.1 in / 12.7 x 4.5 x 2.8 cm, 4.3 oz / 121 g. (Lithium battery included) |
| Data Sheet | |
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Kestrel 5400 – User Guide |
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Kestrel 5 Series – Certificate of Conformity |
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Kestrel Heat Index Reference |
Models & SKUs
• Kestrel 5400 Heat Stress Tracker (Orange): 0854ORA
• Kestrel 5400 Heat Stress Tracker (Tan): 0854TAN
• Kestrel 5400 Heat Stress Tracker + Vane Mount (Orange): 0854VORA
• Kestrel 5400 Heat Stress Tracker + Vane Mount (Tan): 0854VTAN
• Kestrel 5400 Heat Stress Tracker Pro with Compass and LiNK + Vane Mount (Orange): 0854LVCORA
• Kestrel 5400 Heat Stress Tracker Pro with Compass and LiNK + Vane Mount (TAN): 0854LVCTAN
