Anemometer Hot Wire and Thermistor Sensing Method Data Logging No Humidity Sensing No Velocity (FPM) 40 to 3940 Velocity (MPS) 0.2 to 20 Velocity (MPH) 0.5 to 45 Velocity (KPH) 0.7 to 72 Velocity (Knots) 1 to 31 Air Velocity Accuracy +/-3 Percent Temp Range 32 Degrees to 122 Degrees F Probe Size 0.50 in dia. 37 in Telescoping Cord Length 2.4 ft. Data Hold Yes Auto Power Off No Interface RS-232 Calibration Certificate NIST