Kestrel 3550FW Fire Weather Meter with Bluetooth Weather Meter Kestrel
Kestrel 3550FW Fire Weather Meter with Bluetooth Weather Meter Kestrel
Kestrel 3550FW Fire Weather Meter with Bluetooth Weather Meter Kestrel
Kestrel 3550FW Fire Weather Meter with Bluetooth Weather Meter Kestrel
Kestrel 3550FW Fire Weather Meter with Bluetooth Weather Meter Kestrel
Kestrel 3550FW Fire Weather Meter with Bluetooth Weather Meter Kestrel
Kestrel 3550FW Fire Weather Meter with Bluetooth Weather Meter Kestrel

Kestrel 3550FW Fire Weather Meter with Bluetooth


Regular price $289.00 USD Sale price $229.00 USD

Free Spare Battery with each Kestrel 3550FW Meter Purchased!

Bluetooth connectivity

With it's Compass and Bluetooth connectivity, the Kestrel 3550FW Fire Weather Meter will allow you to take your environmental readings on your meter and transfer the readings instantaneously to your mobile device using the free Kestrel app.

Once the data is stored in the Kestrel app, you can share your information using your mobile device. Send via email to a colleague or review stored data in-app. Also included is a spare Kestrel battery!

Easily share and send detailed weather reports with GPS location via text and email with the free Kestrel app.

Fighting wildfires and protecting lives, property and communities demands accurate weather monitoring and the ability to quickly share data to maximize crew safety and deploy resources. The Kestrel 3550FW paired with the free Kestrel app puts powerful tools for monitoring, logging, and sending important weather information for making the most informed decisions for fire management strategy.

Pocket sized, rugged, waterproof, affordable, easy-to-use and equipped with data logging capabilities and wireless data retrieval for monitoring and reporting, the Kestrel 3550FW is your trusted weather guide for fire management and safety.

Comprehensive Monitoring

Consistently accurate measurements of barometric pressure, altitude, dew point, heat stress index, relative humidity, temperature, wind speed and direction, wind chill, temperature and wet bulb readings.

Capture Real-Time Data

Easily view, and record data in real-time on a mobile device with the free Kestrel app.

Send Detailed Reports

Export and send detailed weather reports with GPS location via text or email for vital fire weather data management.

Reference Cards

Includes an easy-to-read Probability of Ignition (PIG) and Fine Dead Fuel Moisture (FDFM) reference card.


The new 3550FW meter has Bluetooth connectivity to pair with the Kestrel app for the ability to wirelessly view, share, and export weather data from a mobile device. Download the Kestrel app from the app store to take advantage of the all the features available.

Download the Kestrel LiNK App on the iOS App Store   Download the Kestrel LiNK App on the Google Play Store


  • Bluetooth Wireless Connectivity
  • Simple 3-Button Control
  • High Contrast, Sunlight Readable Monochrome LCD Display
  • Backlight (Blue white)
  • Temperature Sensor (Patented External Isolated)
  • CR2032 Coin Cell Battery (Average Life 300 Hours)
  • Data Hold Function
  • Drop-Tested to MIL-STD-810G
  • Waterproof to IP67 (3'/1M for 30 minutes)
  • Kestrel Certificate of Conformity
  • Neck Lanyard
  • Patented Impeller and Sensor Technology
  • Slip-On Protective Cover
  • Time of Day
  • User-Replaceable Batteries
  • User-Replaceable Impeller
  • Waterproof & Floats
  • Designed and built in the USA
  • Waterproof PIG Reference Card
  • Free Spare Battery

Physical Specifications:

  • Dimensions: 4.8 x 1.7 x 0.7 in. / 122 x 42 x 18 mm
  • Weight: 2.3 Ounces / 65 Grams
  • MFG Part# 0835FWLCORA, Model# 3550FW (Orange)
    • Meter
    • Neck Lanyard
    • Slide-On-Cover
    • CR2032 Coin Cell Battery (average life 300 hours)
    • Certificate of Conformity with Sensor Specifications
    • Kestrel Manual
    • 5 Year Warranty Manufacturers Warranty
    Kestrel 3550FW Fire Weather Meter

    Sensor Specifications

     Wind Speed

    Units of Measure: mph | kt | B | m/s | ft/min / km/h 
    Specification Range:
    • 0.6 to 40.0 m/s
    • 118 to 7,874 ft/min
    • 2.2 to 144.0 km/h
    • 1.3 to 89.5 mph
    • 1.2 to 77.8 knots
    • 0 to 12 B*
    • 2-131.2 F/S*
    Operational Range:
    • 0.6 to 60.0 m/s
    • 118 to 11,811 ft/min
    • 2.2 to 216.0 km/h
    • 1.3 to 134.2 mph
    • 1.2 to 116.6 knots
    • 0 to 12 B*
    • 2-196.9 F/S*
    • 0.1 m/s
    • 1 ft/min
    • 0.1 km/h
    • 0.1 mph
    • 0.1 knots
    • 1 B
    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:
    • -20.0 to 158.0 °F
    • -29.0 to 70.0 °C
    Operational Range:
    • 14.0.0 to 131.0 °F
    • -10.0 to 55.0 °C
    • 0.1 °F
    • 0.1 °C
    Accuracy (+/-):
    • 0.9 °F
    • 0.5 °C
    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.


    Units of Measure: inHg, hPA, mb
    Specification Range:
    • 25°C/ 77°F
    • 750-1100 hPa|mbar
    • 22.15-32.48 inHg
    • 10.88-15.95 PS
    Operational Range:
    • 0.30 to 48.87 inHg
    • 10.0 to 1654.7 hPa|mbar
    • 0.14 to 24.00 PSI
    • 14.0 to 131.0 °F -10.0 to 55.0 °C
    • 0.1 hPa|mbar
    • 0.01 inHg
    • 0.01 PSI
    Accuracy (+/-):
    • 1.5 hPa|mbar
    • 0.044 inHg
    • 0.022 PSI
    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 (+/-):
    • 1.6 °F
    • 0.9 °C
    • 0.1 °F
    • 0.1 °C
    Sensors employed:
    • Wind Speed
    • Temperature

    Barometric Pressure:

    Accuracy (+/-):
    • 0.07 inHg
    • 2.4 hPa|mbar
    • 0.03 PSI
    • 0.01 inHg
    • 0.1 hPa|mbar
    • 0.01 PSI
    Sensors employed:
    • Pressure
    • User Input (Reference Altitude)


    Accuracy (+/-):
    • typical: 23.6 ft/7.2 m
    • from 750 to 1100 mBar
    • max: 48.2 ft/14.7 m
    • from 300 to 750 mBar
    • 1ft
    • 1m
    Sensors employed:
    • Pressure
    • User Input (Reference Pressure)

    Dew Point

    Accuracy (+/-):
    • 3.4 °F
    • 1.9 °C
    • 15-95% RH.
    • Refer to Range
      for Temperature Sensor
    • 0.1 °F
    • 0.1 °C
    Sensors employed:
    • Temperature
    • Relative Humidity

    Wet Bulb Temperature - Psychrometric:

    Accuracy (+/-):
    • 3.2 °F
    • 1.8 °C
    • 0.1 °F
    • 0.1 °C
    Sensors employed:
    • Wind Speed
    • Temperature

    Heat Index

    Accuracy (+/-):
    • 7.1°F
    • 4.0°C
    • 0.1 °F
    • 0.1 °C
    Sensors employed:
    • Temperature
    • Relative Humidity


    Sales Tax:

    We are only required to collect sales tax on orders shipping to Pennsylvania.

    When will my order ship?

    • Monday-Friday: USPS shipments typically ship the same day as ordered if order is placed by 11:30 AM ET. UPS shipments typically ship the same day as ordered if order is placed by 5:00 PM ET. 
    • Saturday: USPS orders need to be placed by noon ET for Saturday shipping. UPS Ground shipments will ship Monday. Next Day Air and Second Day Air typically ship Saturday if order is placed by 1:00PM ET. Orders that do not ship Saturday will ship Monday.

    If you have a time critical shipment and you need to verify how soon we can ship an item, use our contact form to let us know your needs and we will get right back to you.

    Free Shipping 

    • Free 1-4 business days ETA shipping (offer valid within the USA) on all orders.

    Free Expedited (2 Day Shipping)

    • Free 2 business business days ETA Expedited shipping on all orders with a value of $250.00 or greater (offer valid within the continental USA). We typically use UPS for this option so if you have a PO box, USPS times can vary. Shipping times during covid are not guaranteed.

    Other Shipping Services

    • We offer discounted expedited shipping such as Next Day Air, 2nd Day Air and more. All shipping services and rates are displayed in your cart. To get a shipping rate and time in transit, just add a product to the cart.

    Global (worldwide) Shipping

    • We ship worldwide with few exceptions. You can view our discounted shipping rates and services on the product page or in the cart.
    • All International shipments are insured.

    Standard delivery estimated time in transit

      100% Satisfaction Guaranteed

      We stand behind every product we sell. If you are not satisfied with your purchase or have a problem with your item, just send us an email within 40 days of purchase and we will email you a prepaid return label. All you will need are your order number and we will email the return label within 24 hours to the email address used when placing the order. guarantee doesn’t cover ordinary wear and tear or damage caused by improper use or accidents.

      If your item has a manufacturing defect in its materials or workmanship (extremely rare), you can return it to us at any time. If sent within 45 days, we will replace or refund. If after 45 days and up to 5 years, it will become a warranty issue.

      Once the item(s) are returned to us, it usually takes 24 hours to process refunds.

      We do not ship on the following holidays observed in the USA.

      • New Year's Day
      • Memorial Day
      • Independence Day
      • Labor Day
      • Thanksgiving Day
      • Christmas Day


      FREE USA Returns: We accept returns up to 45 days of purchase. Returns must be in brand new, unused condition. We will send our US customers a pre-paid return label which you can print out and attach to your box. International Returns: International customers are responsible for return costs. Click here to submit a return request. You will need your order number and the email used when placing your order. Important: Please use capital letters when entering your order number. You must enter your information within 40 days from time of order.

      Return Request


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