Kestrel 5400 Wet Bulb Globe Temperature Heat Stress Tracker & Weather Meter
Detect unsafe heat-related conditions - the Kestrel 5400 Heat Stress Tracker is the most user-friendly WBGT meter on the market. Complete with customisable warning flag settings, graphing and measurement statistics.
Also available with LiNK Wireless Communication (SKU: NK-0854LV ).
The Kestrel 5400 measures Wet Bulb Globe Temperature (WBGT), Thermal Work Limit (TWL), heat index, temperature, humidity and much more. 15 measurements in total!
View your live & historical data on your mobile device - up to 100ft away from the Kestrel (requires the 5400 Pro version).
The Kestrel 5400 provides insight into the critical conditions affecting safety, performance and success. The Kestrel 5400 Pro with LiNK Wireless Data Communication adds a compass and rotating wind vane mount for tracking wind direction as well, expanding its usability to include HAZMAT response, and even measuring headwind at the running track.
Connectivity

View and analyse your Kestrel data on your iOS or Android device.
The Kestrel LiNK® App for iOS/Android allows you to Wirelessly connect with iOS and Android devices and remotely view real-time environmental data and receive alerts for changing conditions. Available for your Kestrel 5/7 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. Alerts can be customized based on temperature, heat index, wind, or other measurements. LiNK enables easy firmware updates of Kestrel 5 and 7 series meters. Download from the Apple App Store or Google Play.
Data is transmitted wirelessly via Bluetooth® Low Energy within wireless range (100' line of sight- reduced by walls and obstructions). Mobile device and Kestrel must remain within range to trigger alerts.
Kestrel LiNK for Windows and MAC
Kestrel LiNK for Windows and MAC provides a desktop solution for data retrieval and export as well as firmware updates. Expanded connectivity options allow you to wirelessly connect LiNK enabled Kestrel 5/7 Series Meters, using the optional LiNK USB Dongle, or make a wired USB connection with Kestrel 7 Meters or non-LiNK Kestrel 5 Meters using the USB Data Transfer Cable.
Kestrel LiNK Devices on Ambient Weather Network

Kestrel LiNK devices, including the Kestrel 5000/7000 series meters and Kestrel DROP data loggers, can now connect to the cloud-based Ambient Weather Network (AWN) platform for extended remote monitoring capabilities.*
You can set up your Kestrel device at any desired location that has an internet connection and then view the onsite conditions from wherever you are -- on the AWN app or AmbientWeather.net. You do not have to be onsite to remain in the know about your weather conditions. Create a free account at AmbientWeather.net
*The Kestrel LiNK device data transfer to the AWN cloud platform functionality is specific to Android devices, as the integration with AWN and the transmission of data via the LiNK app relies on the Android platform's capabilities. The Android device must be within Bluetooth range and connected to the internet in order to transmit data from the Kestrel device to the AWN cloud platform. This allows for real-time monitoring and data analysis from virtually anywhere.
- Handheld, portable data logger with on-screen graphing and measurement statistics.
- Measures: Altitude (Barometric), Barometric Pressure, Compass Direction**, Crosswind**, Density Altitude, Dew Point Temperature, Globe Temperature, Headwind/Tailwind**, Heat Stress Index, Naturally Aspirated Wet Bulb Temperature, Relative Humidity, Station Pressure (Absolute Pressure), Temperature, Thermal Work Limit (TWL), Wet Bulb Temperature (WBGT), Wet Bulb Temperature (Psychrometric), Wind Chill, Wind Direction**, Wind Speed/Air Speed. ** Available with Kestrel 5400 Pro version (includes Compass, LiNK + Vane Mount)
- WBGT Warning Flags – Settable
- Alarm buzzer
- Black Globe Temperature Sensor
- Digital Compass (Pro model only)
- Data Logging - Adjustable Interval
- Data Log Graph View
- Date & Time
- Current/minimum/maximum/average reading
- High contrast display is perfectly readable in the brightest sunlight
- Switchable white/red backlight for night-time use
- Drop-Tested to US Military Specification MIL-STD-810G
- Waterproof to IP67 (3ft/1m underwater for 30 minutes)
- Floats if dropped in water.
- Multilingual Menus (English, French, Spanish, German).
Country of Manufacture: United States
Brand: Kestrel
Explanation:
The Kestrel 5400 is a handheld, portable, WBGT (Wet Bulb Globe Temperature) measurement tool and environmental data logger. No need for distilled water, bulky globes, complicated setup or expensive equipment. Getting accurate measurements couldn't be easier: just hold the Kestrel Heat Stress Tracker in the area of interest for both instantaneous and average WBGT measurements. Set the appropriate WBGT thresholds for flag warnings and the loud buzzer, bright LED beacon and on-screen warnings provide instant notification of dangerous conditions. Plus the Kestrel 5400 comes with commonly used heat safety guidelines for athletics, industrial, and military on a handy, waterproof chart.
Unlike other WBGT meters on the market, the Kestrel 5400 is a full-featured weather meter as well. Measure wind speed, maximum wind gusts, temperature, humidity, pressure, wind chill, density altitude and more. The Kestrel 5400 provides insight into the critical conditions affecting safety, performance and success.
Pair with the included Kestrel Vane Mount for hands-free measurements over the course of the practice, training session or workday. And for maximum functionality, use LiNK wireless communication to transmit live measurements to your phone or tablet when you're within range. The Kestrel LiNK app will also display alerts on your mobile device to let you know when conditions have become dangerous.
In addition to measuring the current environmental conditions, the Kestrel 5400 tracks and logs over 10,000 sets of time-stamped data. Your data log can be transferred to a mobile device wirelessly with LiNK wireless communication and Kestrel LiNK app, or to a PC/MAC with either the accessory Kestrel LiNK Dongle or waterproof USB Data Transfer Cable (available separately).
The Kestrel Heat Stress Tracker line has been used by the US Army, US Navy, athletic trainers, and organisers at the Boston Marathon. There truly is no comparable environmental safety monitoring tool on the market.
Kestrel Weather & Environmental Meters are designed & manufactured in the USA and are backed by Kestrel’s 5-year warranty. Innovatively designed for stability and accuracy in abrupt condition changes. Rugged and durable, Kestrels are drop tested, waterproof and float if dropped in water.
The wind speed displayed is a 3 second rolling average. This allows the unit to provide a value that is more representative of the typical, ambient conditions rather than peak speeds of instantaneous blasts of air.
The Kestrel 5400 anemometer can easily be switched between mph, km/h, ft/min, m/s, knots and Beaufort Scale.
All Kestrel models can be fitted to a portable rotating wind vane mount and tripod, to create a very portable and accurate weather station.
Patented Impeller
Every Kestrel meter features a large, 1” impeller mounted on a sapphire jewel bearing, which means it starts rotating with the slightest puff of air. For superior accuracy, the impeller housing can rotate in the unit. The patented impeller is user-replaceable by simply pushing it out with your thumbs, which means it can easily be replaced if it is damaged or worn. The measurements from the wind impeller are taken magnetically. The impeller is not glued or attached to the unit. Because every new impeller is calibrated in the wind tunnel at the USA factory, if your application demands regular calibration, simply pop in a new impeller and the Kestrel Wind Meter is restored to like-new factory calibration standards.
Contents:
Kestrel 5400WL Pro WBGT Heat Stress Tracker with Compass & Vane Mount + LiNK Wireless Communication (SKU: NK-0854LV)
Protective Drawstring Pouch
Lanyard
Battery - 1 x AA
Heat Stress Reference Card (Waterproof)
Certificate of Conformity (with complete specifications)
Instructions
Ideal For: Professional, Education
Dimensions: 12.7 x 4.5 x 2.8 cm, 121 grams
Batteries: 1 x AA Battery (included)
Software:
Kestrel LiNK App Features
• View real-time conditions and download data logs from up to 8 local devices up to 100 ft away.
• View and analyse logged data through measurement lists, statistics and graphs.
• Remote Monitoring – Set Alert Service on a local mobile device and receive email alerts from your Kestrel DROP, 5 Series, or 7 Series whenever conditions go outside your preset thresholds.
• Export complete or partial data logs to analyse in a spreadsheet.
• Send weather reports through social media.
• Manage the device name, logging rate and other device settings.
Standard delivery (Royal Mail) - £3.95 to £4.99
Available for purchases under £200. Your order should be with you within 4-5 working days.
Tracked delivery - £5.95 to £6.50
Our tracked delivery is either Royal Mail tracked, Parcelforce or UPS. Your order should be with you within 1-2 working days.
Next Day service - £9.95
Place your order before 2:30pm Monday - Friday and receive your order the next working day (excludes Saturdays, Sundays and Public holidays). Orders placed at the weekend are shipped on the next working day and usually arrive the following day. Goods shipped on a next working day service may be subject to delays by the courier which are outside of our control. Services to outlying areas may differ and take longer and enhanced services may not be available.
International delivery
International delivery is available for this product. The cost and delivery time depend on country.
Collection
You can collect from our warehouse. Please call before visiting to ensure we have your order ready.
- In stock, ready to ship
- Backordered, shipping soon
- Worldwide shipping