The World's Most User-Friendly WBGT Meter
The leader in WBGT monitoring without the bulk, complexity, and cost.
- Accurate WBGT
- Portable
- Built-In Guidelines
- Custom Alerts
- Bluetooth + Data Logging
- Indoor & Outdoor Monitoring
What Sets Kestrel Apart
On-Site WBGT
The 5400 measures and logs indoor and outdoor Wet Bulb Globe Temperature (WBGT).
Guidelines Built In
Preloaded with ACGIH, state athletic zones, and military protocols—so you know what to do the moment heat risk rises.
Custom Alerts
Receive text, push, email or on-device alerts from custom thresholds or the preprogrammed guidelines.
Explore Heat Stress Solutions
Kestrel 5400 Heat Stress Tracker
Indoor & Outdoor
Rugged & Affordable
IP67 and NEMA-6 rated, 300-hr lithium battery—at a fraction of fixed-station cost
Tripod or Handheld
Clip-on vane mount = spot-check
WBGT Sensor
1” black-globe + RH + temp + pressure; accuracy ±0.3 °C
Pre-Programmed Guidelines
Athletic, ACGIH, Military modes— no spreadsheets needed
Kestrel 5400 Heat Stress Tracker
Indoor & Outdoor
Rugged & Affordable
IP67 and NEMA-6 rated, 300-hr lithium battery—at a fraction of fixed-station cost
Tripod or Handheld
Clip-on vane mount = spot-check
WBGT Sensor
1” black-globe + RH + temp + pressure; accuracy ±0.3 °C
Pre-Programmed Guidelines
Athletic, ACGIH, Military modes— no spreadsheets needed
5400 Heat Stress Monitoring System
Indoor
Pre-Programmed Guidelines
Athletic, ACGIH, Military modes. No spreadsheets needed.
Wall Mounted with Tablet
Removable wall-mounted 5400 and tablet showing current data
WBGT Sensor
1” black-globe + RH + temp + pressure
Rugged & Affordable
IP67 & NEMA-6 rated, AC Adapter – more affordable than other leading WBGT solutions
5400 Heat Stress Monitoring System
Indoor
Pre-Programmed Guidelines
Athletic, ACGIH, Military modes. No spreadsheets needed.
Wall Mounted with Tablet
Removable wall-mounted 5400 and tablet showing current data
WBGT Sensor
1” black-globe + RH + temp + pressure
Rugged & Affordable
IP67 & NEMA-6 rated, AC Adapter – more affordable than other leading WBGT solutions
KestrelMet 6400 WBGT Weather Station
Outdoor
Advanced Graphing
In-depth analysis and multi-parameter graphing
24/7 Connectivity
Wi-Fi or Cellular models with cloud dashboard and real-time alerts
Comprehensive Weather Data + WBGT
Measures wind, rain, pressure, temp, RH, solar radiation plus WBGT. 1" black-globe.
Durable Continuous Monitoring
Mount on pro-grade tripod for multi-year field durability
KestrelMet 6400 WBGT Weather Station
Outdoor
Advanced Graphing
In-depth analysis and multi-parameter graphing
24/7 Connectivity
Wi-Fi or Cellular models with cloud dashboard and real-time alerts
Comprehensive Weather Data + WBGT
Measures wind, rain, pressure, temp, RH, solar radiation plus WBGT. 1" black-globe.
Durable Continuous Monitoring
Mount on pro-grade tripod for multi-year field durability
Kestrel 3000 Heat Stress Meter
Indoor & Outdoor
Reliable Heat Index Spot Checks
Instant readings of heat index, temperature, and humidity
Rugged & Waterproof
Drop-tested MIL-STD 810G and IP67 rated
Battery-Powered & Long Lasting
Runs up to 300 hours on a replaceable CR2032 battery
Budget-Friendly Protection
An easy way to start heat stress checks without a full WBGT system
Kestrel 3000 Heat Stress Meter
Indoor & Outdoor
Reliable Heat Index Spot Checks
Instant readings of heat index, temperature, and humidity
Rugged & Waterproof
Drop-tested MIL-STD 810G and IP67 rated
Battery-Powered & Long Lasting
Runs up to 300 hours on a replaceable CR2032 battery
Budget-Friendly Protection
An easy way to start heat stress checks without a full WBGT system
DROP D2 Heat Stress Monitor
Indoor & Outdoor
Track Indoors
Great for facilities, transport vehicles, and smaller work zones
Mount It Anywhere
Keyring loop and flat base make it ideal for discreet deployment
Compact and Cost-Effective
About the size of a golf ball with serious heat stress monitoring power
Wireless Heat Index Monitoring
Bluetooth-enabled Heat Index logging in a compact form factor
DROP D2 Heat Stress Monitor
Indoor & Outdoor
Track Indoors
Great for facilities, transport vehicles, and smaller work zones
Mount It Anywhere
Keyring loop and flat base make it ideal for discreet deployment
Compact and Cost-Effective
About the size of a golf ball with serious heat stress monitoring power
Wireless Heat Index Monitoring
Bluetooth-enabled Heat Index logging in a compact form factor
Built for Indoor & Outdoor Monitoring
Athletic Programs
Sideline safety with your region
Construction & Utilities
ACGIH guidelines built in with logs & exports.
Manufacturing & Warehousing
Indoor heat pockets identified
Military & First Responders
Instant on-site readings with built in TB MED-107 guidelines.
Find the right tool for your team
One Heat Risk. Five Reliable Solutions.
Whether you need a spot check or 24/7 automated monitoring, Kestrel has a WBGT solution for your environment.
Testimonials

The Kestrel Heat Stress Trackers are a major asset to both the Wilmington Police Department's special operations teams and forensic services unit. They provide quick, clear, and critical weather and WBGT data that protects the safety of our responders by enabling them to do their jobs more effectively in any environmental conditions. They are deployed on all major scenes and incidents, as the protection of our personnel in hazardous conditions is paramount.

Adam R.
Wilmington Police Department

We keep 8 Buff Orphingtons in a mobile coop on our suburban property. We wanted to ensure they would be warm enough to continue laying over the winter so we constructed a "coop hoop" greenhouse. With a DROP2 Temperature and Humidity logger we are able to confirm that our chickens keep themselves remarkably warm even on sub-freezing days. We also receive alerts on our phones when we need to vent the hoop house to ensure they don't overheat.

Karin J.
Farmer

The Kestrel 5400 has been tested and utilized by the Korey Stringer Institute in many sport environments over the past year, all with huge success... In all of the circumstances, the incredible portability and ease of use made it a great asset to our staff.

Doug Casa
Chief Executive Officer,
Korey Stringer Institute
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