Anemometer Rotating Vane and Thermistor Sensing Method Data Logging Yes Humidity Sensing Yes Velocity (FPM) 100 to 3940 fpm Velocity (MPS) 0.5 to 20 mps Air Velocity Accuracy +/-3 Percent Air Volume 0 to 99 999 cfm Temp Range -4 Degrees to 140 Degrees F Relative Humidity Range 0.1 Percent to 99.9 Percent Probe Size 0.70 in dia Cord Length 3.3 ft Data Hold Yes Auto Power Off Yes Interface USB Storage Capacity 2 000 Data Sets with 6 Types of Readings in Each Set