FLIR EM54 Airflow Meters & Thermo-Anemometers; Meter Type: Airflow Meter ; Measures: Airflow; Humidity; Temperature ; Humidity Sensing: Yes ; Data Logging: No ; Auto Power Off: Yes ; Minimum Air Velocity: 0.4 m/s; .8 knots; .9 mph; 1.4 km/h; 79 ft/mi