Anemometer Rotating Vane and Thermistor Sensing Method Data Logging Yes Humidity Sensing No Velocity (FPM) 80 to 4 930 fpm Velocity (MPS) 0.4 to 25 mps Velocity (MPH) 0.9 to 55.9 mph Velocity (KPH) 1.4 to 90 kph Velocity (Knots) 0.8 to 48.6 knots Air Velocity Accuracy +/-1 Percent Temp Range 32 Degrees to 122 Degrees F Probe Size 2.80 in dia Cord Length 3.3 ft Data Hold Yes Auto Power Off Yes Interface RS-232 Storage Capacity 20M Readings Using A 2G SD Card