Anemometer Rotating Vane and Thermistor Sensing Method Data Logging No Humidity Sensing No Velocity (FPM) 100 to 6 890 fpm Velocity (MPS) 0.5 to 35 mps Velocity (MPH) 1.1 to 78.3 mph Velocity (KPH) 1.8 to 126 kph Velocity (Knots) 1 to 68 knots Air Velocity Accuracy +/-2 Percent Air Volume 0 to 999 900 cfm Temp Range 32 Degrees to 176 Degrees F Probe Size 2.80 in dia Cord Length 3.9 ft Data Hold Yes Auto Power Off Yes Interface RS-232