Anemometer Rotating Vane and Thermistor Sensing Method Data Logging No Humidity Sensing No Velocity (FPM) 100 to 6890 Velocity (MPS) 0.5 to 35 Velocity (MPH) 1.1 to 78.3 Velocity (KPH) 0.7 to 72 Velocity (Knots) 0.4 to 33.8 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 Storage Capacity Min/Max Calibration Certificate NIST