GENEQ > Meteorology > Air Velocity

Pocket Air Flow Tracker for HVAC Monitoring
Model Kestrel 4100


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 batteries2-year warranty
  • Assembled in the USA
  • US Patent Nos. 5,783,753 and 5,939,645 and 6,257,074

Specifications
Air Velocity
Accuracy ±3%
Response Time 1 second
Calibration Drift <2% after 100 hours use at 7m/s
Units Display Resolution Range
Knots KTS 0.1 0.6 to 78
Meters per Second M/S 0.1 0.3 to 40
Kilometers per Hour KM/H 0.1 1.0 to 144
Miles per Hour MPH 0.1 0.7 to 89
Feet per Minute FPM 1 59 to 7877
Beaufort Force BEAU 1 1 to 16

Air Flow   
Accuracy ±3%
Response Time 1 second
Calibration Drift <2% after 100 hours use at 7m/s
Units Display Resolution Range
Cubic Feet per Minute cfm 1 0 to 99,999
Liters per Second L/s 1 0 to 99,999
Cubic Meters per Second m3/s 1 0 to 99,999
Cubic Meters per Minute m3/m 1 0 to 99,999
Cubic Meters per Hour m3/h 1 0 to 99,999

Temperature
Accuracy
Temperature ±1°C
Wind Chill ±1°C
Dew Point ±2°C
Heat Index ±3°C
Response Time approximately 1 minute for most conditions
Units Display Resolution Range
Celsius °C 0.1 -29 to 70
Fahrenheit °F 0.1 -20 to 158

Relative Humidity
Accuracy ±3%
Response Time approximately 1 minute for most conditions
Calibration Drift ±2% over 24 months (can be field calibrated)
Units Display Resolution Range
Percent % 0.1 5 to 95%
Display
Update 1 second
Temperature Range Normal operation from -20°C to 60°C [-4°F to 140°F]. Below
-20°C [-4°F], accurate readings may be taken by keeping the unit warmer than -20°C [-4°F] and exposing it for the minimum time necessary to take a reading (less than 1 minute).
Storage Temperature -30°C to 60°C [-22°F to 140°F].
Auto Shutdown After 15 minutes of no button presses. (This feature can be disabled.)

Physical
Battery Two AAA alkaline batteries (included). Typical life, 400 hours.
Impeller 25 mm. [1in.] diameter, sapphire bearings, light weight. User-replaceable impeller/housing assembly.
Temperature Sensor Hermetically sealed precision thermistor.
Humidity Sensor Solid state silicon capacitive sensor.
Dimensions 12.7 x 4.5 x 2.8 cm. [5 x 1.8 x 1.1 in.]
Weight 102 g. [3.6 oz.]
Warranty Standard 2-year covers parts and labor.