DEALER INQUIRIES WELCOME!! CFM made easy! 1. Select shape of duct.... 2. Set dimensions.... 3. Hold meter in air flow.... Results! That easily. No equations or calculators required! Finally, a hand held unit that measures everything you need to know on a job site. The Kestrel 4100 is the new revolution in HVAC monitoring. Features: Air flow in cfm, L/s, m³/s, m³/m, m³/h Air Velocity in ft/m, mph, m/s, km/h, kts, Beaufort Temperature in °F or °C Humidity in % Additional measurements of dewpoint, wind chill and heat stress index Data Logger (automatic and manual) Minimum, Maximum and Average values Multi-Function 3-line display Impeller can be replaced without tools Humidity sensor can be recalibrated in the field with our Relative Humidity Calibration Kit. Graphical Display for logged values Upload to a computer (with optional interface) Backlight for low light conditions Includes neck and wrist lanyards, protective pouch and 2 AAA batteries 2-year warranty Assembled in the USA US Patent Nos. 5,783,753 and 5,939,645 and 6,257,074 For more information and specifications on this instrument visit the Kestrel website. Use your browser's BACK button to return here to purchase your Kestrel 4100. Kestrel 4100 Pocket Air Flow Tracker for HVAC Applications - FREE UPS 2 DAY AIR SHIPPING 0880Regular price: $299.00Sale price: $239.00 Need more information? Please feel free to contact us at 1-800-592-6940 - Ask for Extension 547 or Internet Sales.