New Kestrel 4100 HVAC Pocket Air Flow Tracker
The Kestrel 4100 is the new revolution in HVAC monitoring. Kestrel Meters are the leader in their field of measuring wind flow, and this new unit has just been released. No longer to do you have to have calculators to figure out the air flow. To figure CFM, 1. Select shape of duct. 2. Set dimensions 3. Hold meter in air flow = Results. No equations or calculators required! The Kestrel 4100 is made in America.
* Air flow in cfm, L/s, m³/s, m³/m, m³/h
* Air Velocity in ft/m, mph, m/s, km/h, kts, Beaufort
* 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
* US Patent Nos. 5,783,753 and 5,939,645 and 6,257,074
Calibration Drift <2% after 100 hours use at 7m/s
Units Display Resolution Range
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
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
Response Time approximately 1 minute for most conditions
Units Display Resolution Range
Response Time approximately 1 minute for most conditions
Calibration Drift ±2% over 24 months (can be field calibrated)
Units Display Resolution Range
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.)
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.]
Warranty Standard 5-year covers parts and labor.
*Specifications are subject to change.
Replacement Impeller Tripod Silva 340 Compass Silva Polaris Compass
Kestrel Case Kestrel Interface Field Calibration Kit Weather Vane (soon)
