0835FWORA
You're welcome to order as much as you need! If the quantity exceeds what we currently have in stock, expect your order to ship within 3 business days.
The Kestrel 3500FW Fire Weather Meter is a professional-grade tool designed specifically for firefighting and wildfire management. Designed and built in the USA, this compact yet powerful weather meter provides critical fire weather data to ensure safe and effective operations in the field. It accurately measures wind speed (including current wind speed, average wind speed, and maximum wind gust), temperature, barometric pressure, relative humidity, pressure trend, wind chill, heat stress index, dew point temperature, altitude (barometric), and wet bulb temperature (psychrometric). With this essential data, the Kestrel 3500FW allows professionals to make informed decisions and stay safe when assessing fire behavior and environmental conditions. 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.
For firefighting professionals and wildfire management teams, the Kestrel 3500FW is a critical tool that provides real-time, actionable data for understanding fire weather conditions. With precise measurements of wind speed, temperature, humidity, pressure, wind chill, heat stress, and dew point, along with the included Probability of Ignition (PIG) Reference Card, the Kestrel 3500FW allows you to assess fire danger and optimize response strategies. Its waterproof design and floating capabilities make it durable and reliable in challenging environments, ensuring that you have the right information when you need it most.
Sensor Specifications
|
Wind Speed |
|
| Units of Measure: | mph | kt | B | m/s | ft/min / km/h |
| Specification Range: |
|
| Operational Range: |
|
| Resolution: |
|
| 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. |
|
Ambient Temperature |
|
| Units of Measure: | Fahrenheit, Celsius |
| Specification Range: |
|
| Operational Range: |
|
| Resolution: |
|
| Accuracy (+/-): |
|
| 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. |
|
Pressure |
|
| Units of Measure: | inHg, hPA, mb |
| Specification Range: |
|
| Operational Range: |
|
| Resolution: |
|
| Accuracy (+/-): |
|
| 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. |
|
Relative Humidity |
|
| 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
|
Wind Chill |
|
| Accuracy (+/-): |
|
| Resolution: |
|
| Sensors employed: |
|
|
Barometric Pressure |
|
| Accuracy (+/-): |
|
| Resolution: |
|
| Sensors employed: |
|
|
Altitude |
|
| Accuracy (+/-): |
|
| Resolution: |
|
| Sensors employed: |
|
|
Dew Point |
|
| Accuracy (+/-): |
|
| Resolution: |
|
| Sensors employed: |
|
|
Wet Bulb Temperature - Psychrometric |
|
| Accuracy (+/-): |
|
| Resolution: |
|
| Sensors employed: |
|
|
Heat Index |
|
| Accuracy (+/-): |
|
| Resolution: |
|
| Sensors employed: |
|
Downloads:
