REED Instruments R4500SD-KIT2 Airflow Meters & Thermo-Anemometers; Maximum Air Velocity ft/min (Feet): 4921; Min Air Velocity ft/min (Feet): 40; Resolution: 0.1 m/s, km/h, mph, knot, 1 fpm; Maximum Measuring Range (Deg F): 122.000; Measures or Tests: