About the Kestrel 5400FW Fire Weather Meter Pro

The Kestrel 5400FW Fire Weather Meter offers all the same measurements and capabilities as the standard Kestrel 5400 Heat Stress Tracker, making it ideal for athletic, occupational, and heat safety monitoring

All this while also providing powerful additional tools specifically for wildland firefighting.

Just like the 5400, the 5400FW measures and reports temperature, humidity, wind speed, and WBGT (Wet Bulb Globe Temperature) for accurate heat stress and environmental monitoring in sports, military, and industrial settings.

In addition, the 5400FW includes advanced fire-weather features such as Fine Dead Fuel Moisture (FDFM) and Probability of Ignition (PIG) — critical indices used by wildland firefighters to evaluate ignition risk and fire behavior potential in the field. The 5400FW now includes Vapor Pressure Deficit (VPD). VPD quantifies the gap between the moisture currently in the air and the maximum moisture the air can hold at saturation. This measurement reveals the atmosphere’s drying potential—one of the most important drivers of fuel moisture (FM). Because FM is fundamental to wildfire behavior and management, being able to estimate it accurately in the field—without relying on time-consuming laboratory analysis—marks a major operational advancement.

In short, the Kestrel 5400FW does everything the 5400 does — and more. It’s the perfect choice for anyone who needs reliable heat stress tracking and the added capability to assess fire weather conditions.

Features
  • Waterless WBGT accurately calculated from on-board digital sensors with no tedious setup or maintenance.
  • Large, hi-res, hi-contrast, graphic display is perfectly readable in the brightest sunlight and is backlit for use in low-light conditions.
  • Handheld, portable, data logger with customizable warning flag settings, graphing and measurement statistics.
  • Optional LiNK connectivity powered by Bluetooth Smart® provides wireless communication to mobile devices and computers and easy data export for sharing with crew members.
  • Rugged (drop tested to MIL-STD-810G standards), waterproof (sealed to IP67 standards) and floats.
  • User-Replaceable Impeller
  • Protective pouch, neck lanyard and Lithium AA battery included. • 5-year warranty.
Measures
  • Wind Speed
  • Current Wind Speed
  • Average Wind Speed
  • Maximum Wind Gust
  • Temperature
  • Barometric Pressure
  • Relative Humidity
  • Wind Chill
  • Heat Stress Index
  • Density Altitude
  • Dew Point Temperature
  • Wind Direction
  • Naturally Aspirated Wet Bulb Temperature
  • Globe Temperature
  • Wet Bulb Temperature (Psychrometric)
  • WBGT (Wet Bulb Globe Temperature)
  • Thermal Work Limit (TWL)
  • Probability of Ignition (PIG)
  • Fine Dead Fuel Moisture (FDFM)
  • Pressure Trend
  • Bluetooth (LiNK model)
  • Vapor Pressure Deficit (VPD)
What else is included?
  • (1) AA Lithium Battery
  • Instructions
  • Protective Draw String Pouch
  • Lanyard
  • Certificate Of Conformity (Spec Sheet)
Downloads

Kestrel Instruments

Designed and Built in the USA. Kestrel Instruments are known for their accuracy, toughness, and reliability in the field. Trusted by professionals worldwide for precision weather measurement and environmental data logging.

FAQs

What makes Kestrel meters different from other weather instruments?

Kestrel meters combine rugged durability, precision engineering, and field-proven reliability in a compact design. Built for professional use in harsh environments, they deliver accurate real-time data for weather monitoring, environmental research, and outdoor operations. Unlike consumer-grade instruments, Kestrel meters are engineered to withstand extreme conditions while maintaining measurement accuracy that professionals depend on. Kestrel instruments are trusted by meteorologists, researchers, outdoor enthusiasts, and industrial teams worldwide for their consistent performance and dependable results in the field.

What warranty coverage do your Kestrel Instruments include, and what is not covered?

Kestrel Instruments include a full 5-year limited lifetime warranty against defects in materials and workmanship under normal use. Coverage includes the meter body, display, and internal components. The warranty does not cover damage from misuse, neglect, unauthorized repair, water immersion beyond rated specifications, battery leakage, or wear from normal operation. Accidental drops, extreme temperature exposure, and chemical exposure are also excluded. For specific coverage details and warranty registration, please contact our support team or consult your product documentation.

What makes Kestrel meters suitable for professional field work?

Kestrel meters are engineered for demanding field conditions with rugged construction, precision sensors, and reliable performance in extreme environments. Built to withstand harsh weather, dust, and impact, they deliver accurate environmental data in real-time—whether you're monitoring livestock conditions, conducting agricultural research, or managing outdoor operations. Their compact design, intuitive interface, and long battery life make them practical tools for professionals who need dependable measurements without compromise.

What is your shipping policy?

We offer worldwide shipping with competitive rates calculated at checkout. Orders typically ship within 1-2 business days. Domestic US orders arrive in 3-7 business days via standard carriers; international delivery times vary by destination, typically 7-21 business days. All orders include tracking information. We partner with UPS, FedEx, and USPS to ensure reliable delivery of your precision instruments. For expedited options or specific shipping questions, contact our support team see our estimated delivery dates offered at checkout for each shipping selection.

Who manufactures Kestrel Instruments products and what is your company background?

Kestrel Instruments are manufactured by Nielsen-Kellerman, a leader in precision environmental measurement based in Pennsylvania, USA. Our partnership combines Nielsen-Kellerman's 40+ years of engineering expertise with Extreme Meters' commitment to delivering rugged, field-tested instruments to professionals worldwide. Together, we ensure every meter meets the highest standards for accuracy and durability.

What is your return policy?

We offer a 45-day return window from the date of purchase. Items must be unused, in original packaging, and in resalable condition. Return shipping is the customer's responsibility unless the item arrived damaged or defective. Once we receive and inspect your return, refunds are processed within 5-7 business days. For international orders, please contact our support team to discuss return options, as duties and shipping costs may apply. Damaged or defective items are eligible for replacement or full refund at no cost.

Didn’t find your answer?

Don't hestitate to contact us