Kestrel has taken the calculations and guess work out of air flow measurement with the Kestrel 4100 Air Flow Tracker. Simply enter the duct shape and dimensions, hold the Kestrel 4100 in the air flow and the volume air flow readings are instantaneously displayed... no calculator required! The Kestrel 4100 also measures temperature, relative humidity, and dew point, either ambient or in any accessible airflow.

This versatile instrument features a powerful data logger that records 480 sets of data at user-selectable time intervals (up to 34 weeks of data can be recorded!). You may review the logged data in clear on-screen graphs or upload the data to a PC for in-depth review and graphing. The Kestrel 4100 is an affordable tool that is easy to carry and use! Perfect for facilities managers and HVAC equipment sales people, field installers, and technicians.

• Current, Average, & Maximum Air Velocity
• Air Flow
• Relative Humidity & Dew Point
• Wind Chill & Heat Stress Index
• Wet Bulb Temperature
• Air Temperature
• Current & Average Wind Speed
• Maximum Wind Gust
• One-button clear and restart of Max Wind Gust and Average Wind measurement`
• Waterproof & Floats
• Manual data capture
• Automatic Data Storage
• Customizable Data Storage - 2000-point data logger with graphical display for each measurement variable
• Auto data storage interval settable from 2 seconds to 12 hours
• Minimum, maximum, average and logged history stored and displayed for every measured value
• Data Upload with optional PC interface and provided software
• Optional RS-232 connection with USB adapter available
• Electroluminescent backlight with automatic or manual activation
• Real-time hours:minutes:seconds clock, calendar, automatic leap-year adjustment
• User-selectable auto shutdown: 15 or 60 minutes with no keypresses or disabled
• Data Charting
• Five Languages: English, French, Spanish, German, and Italian
• User-replaceable Impeller
• Flip-top Impeller Cover
• Soft Carry Case
• Wrist and Neck Lanyards
• Five-year warranty from the manufacturer

• Wind Speed (sample every 1 second)
  • 0.4 to 60 m/s (0.1 resolution, 3% accuracy)
  • 59 to 11,948 ft/min (1 resolution, 3% accuracy)
  • 1 to 218 km/h (0.1 resolution, 3% accuracy)
  • 0.8 to 135 mph (1 resolution, 3% accuracy)
  • 0.6 to 118.3 kt (0.1 resolution, 3% accuracy)
  • 0 to 12 Beaufort (0.1 resolution, 3% accuracy)
• Air Flow (sample every 1 second)
  • 0 to 99,999 cfm (1 resolution, 3% accuracy)
  • 0 to 99,999 m3/h (1 resolution, 3% accuracy)
  • 0 to 99,999 m3/m (1 resolution, 3% accuracy)
  • 0.0 to 9,999.9 m3/s (0.1 resolution, 3% accuracy)
  • 0 to 99,999 L/s (1 resolution, 3% accuracy)
• Temperature (sample every 1 second)
  • -20.0 to 158.0 °F (0.1 resolution, 1.8 °F accuracy)
  • -29.0 to 70.0 °C ( 0.1 resolution, 1.0 °C accuracy)
• Relative Humidity (sample every 1 minute)
  • 0.0 to 100.0 % (0.1 resolution, 3.0 %RH accuracy
• Wind Chill (sample every 1 second)
  • -49.0 to 257.0 °F (0.1 resolution, 1.8 °F accuracy)
  • -45.0 to 125.0 °C (0.1 resolution, 1.0 °C accuracy)
• Heat Index (sample every 1 minute)
  • 0.0 to 100.0 %RH, -49.0 to 257.0 °F
    (0.1 resolution, 3.6 °F accuracy)
  • -0.0 to 100.0 %RH, -45.0 to 125.0 °C
    (0.1 resolution, 2.0 °C accuracy)
• Dew Point (sample every 1 minute)
  • 0.0 to 100.0 %RH, -49.0 to 257.0 °F
    (0.1 resolution, 3.6 °F accuracy)
  • 0.0 to 100.0 %RH, -45.0 to 125.0 °C
    (0.1 resolution, 2.0 °C accuracy)
• Power requirements: 2 AAA Alkaline batteries (included)
• Battery life: ±400 hours, depending on backlight use

• 5.0" x 1.8" x 1.1" (12.7cm x 4.5cm x 2.8cm)

...and many more!

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