0835FWLCORA
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Kestrel 3550FW Fire Weather Meter – Essential for Firefighting and Wildland Fire Management – Built in the USA, Waterproof, Floats, Bluetooth
The Kestrel 3550FW Fire Weather Meter is a powerful, USA-made tool designed to provide crucial weather data for firefighting, wildland fire management, and outdoor safety. Whether you're on the front lines of a wildfire or monitoring conditions in the field, this rugged, waterproof, and floating weather meter ensures you have the most accurate and reliable data at your fingertips. With key measurements including wind speed, temperature, relative humidity, and wind chill, the Kestrel 3550FW helps assess fire conditions, predict behavior, and ensure the safety of personnel in the field. The Kestrel 3500FW allows for easy switching between mph, km/h, ft/min, m/s, knots, Beaufort as well as Fahrenheit, Celsius. Pressure readings include inHg, hPA, mb.
"Kestrel readings are consistent and accurate. I like the fuel moisture tables. They are easy to use and the tool is durable and weather-proof. It fits in just about any size pocket or can be tied to a vest or shoulder harness for convenient access."
-Michael W.
Wildland Firefighter
The Kestrel 3550FW meter has Bluetooth capability for wireless viewing, sharing, and exporting of weather data through the use of the Kestrel app on a mobile device. To access all available features, download the Kestrel app from the app store.
Ideal for Wildland Firefighters, Fire Management, and Outdoor Safety
The Kestrel 3550FW Fire Weather Meter is an essential tool for anyone involved in wildland firefighting, fire management, or outdoor activities that require precise and reliable weather monitoring. With its wide range of weather measurements, Bluetooth connectivity, waterproof construction, and ability to float, the Kestrel 3550FW is designed to meet the demands of the field. Whether you're predicting fire behavior, managing wildfires, or ensuring the safety of personnel, this meter provides the data you need to make informed, timely decisions.
Sensor Specifications
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Wind Speed |
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| Units of Measure: | mph | kt | B | m/s | ft/min / km/h |
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| Accuracy (+/-): | Larger of 3% of reading, least significant digit or 20 ft/min |
| Notes: | 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% @ 5º off-axis; -2% @ 10º; -3% @ 15º. Calibration drift < 1% after 100 hours use at 16 MPH | 7 m/s. Replacement impeller (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. *F/S only in Ballistics units. Beaufort not available in Ballistics units. |
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Ambient Temperature |
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| Units of Measure: | Fahrenheit, Celsius |
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| Notes: | Hermetically sealed, precision thermistor mounted externally and thermally isolated (US Patent 5,939,645) for rapid response. Airflow of 2.2 mph|1 m/s or greater provides fastest response and reduction of insolation effect. Calibration drift negligible. Thermistor may also be used to measure temperature of water or snow by submerging thermistor portion into material -- remove impeller prior to taking submerged measurements and ensure humidity sensor membrane is free of liquid water prior to taking humidity-based measurements after submersion. |
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Pressure |
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| Units of Measure: | inHg, hPA, mb |
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| Notes: | Monolithic silicon piezo-resistive pressure sensor with second-order temperature correction. Between 1100–1600 mbar, unit will operate with reduced accuracy. Sensor may not operate above 1600 mbar and can be damaged above 6,000 mbar or below 10 mbar. Calibration drift is negligible for the life of the product. |
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Relative Humidity |
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| Units of Measure: | % |
| Specification Range: | 5 to 95% 25°C non-condensing |
| Operational Range: | 0 to 100% |
| Resolution: | 0.1 %RH |
| Accuracy (+/-): | 3%RH |
| Notes: | 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. |
Calculated Measurements
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Barometric Pressure |
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Altitude |
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Dew Point |
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Wet Bulb Temperature - Psychrometric |
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Heat Index |
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Downloads:
