EXTECH HD300-NIST Anemometer with IR Temperature. More details: Anemometer with IR Temperature, Rotating Vane Sensing Method, Data Logging No, Humidity Sensing No, Velocity (FPM) 80 to 5900, Velocity (MPS) 0.4 to 30, Velocity (MPH) 0.9 to 67, Velocity (KPH) 1.4 to 108, Velocity (Knots) 0.8 to 58, Air Velocity Accuracy +/-3 Percent, Air Volume 0 to 999, 900 cfm, Temp. Range -58 Degrees to 932 Degrees F, Probe Size 1.75 In. dia., Cord Length 3.9 ft., Data Hold Yes, Auto Power Off Yes, Interface USB, Calibration Certificate NIST