Anemometer with IR Temperature Rotating Vane and Thermistor Sensing Method Data Logging No Humidity Sensing No Velocity (FPM) 80 to 5900 fpm Velocity (MPS) 0.4 to 30 mps Velocity (MPH) 0.9 to 67 mph Velocity (KPH) 1.4 to 108 kph Velocity (Knots) 0.8 to 58.3 knots Air Velocity Accuracy +/-3 Percent Air Volume 0 to 9 999 cfm Temp Range 14 Degrees to 140 Degrees F Probe Size 2.83 in dia Cord Length 3.9 ft Data Hold Yes Auto Power Off Yes Calibration Certificate NIST