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 and many more.
"Kestrel 4100 Pocket Air Flow Tracker Air Condition Heater Vent Anemometer.
The 4100 comes Safety Orange. The Kestrel Tracker is the next generation of weather monitoring.
Results in your heater vents and air ducts! 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.
We back every Kestrel product that we sell with our 100% money back guarantee."

Kestrel 4200 Pocket Air Flow Tracker Air Condition Heater Vent Anemometer.
The 4200 comes in Safety Orange.
New for 2007, the Kestrel 4200 has made HVAC technicians jobs even easier with automatic humidity
ratio readings. Of particular interest to dehumidification professionals,
the Kestrel 4200 measures relative humidity and calculates dewpoint,
wet bulb temperature and heat stress index as well as the humidity ratio -
and the patented dual chamber humidity sensor assures fast and accurate readings in any environment.
Like the 4100, the Kestrel 4200 has taken the calculations and guess-work out of Air Flow measurements with
automatic air flow readings. Plus it measures every other environmental parameter and stores over two years worth
information in its built-in data logger. With on-screen customization,
the 4200 can truly be personalized for every technician.
Easy set-up screens allow unit to display only relevant readings,
and hide screens not relative to the job.We back every Kestrel product that we sell with our 100% money back guarantee."