The Sper Scientific Mini Environmental Quality Advanced Meter is capable of measuring twelve (12) different environmental parameters. With this meter you can measure: Wind Speed, Air Temperature, Air Volume, Relative Humidity (RH), Wind Chill, Heat Stress Index, Dew Point, Wet Bulb, PT 100 Ohm (with optiona lprobe), Barometric Pressure, Altitude, and Visible Light. The Mini Environmental Quality Advanced Meter also read air speed in addition to its set environmental parameters. It will sense airflow as low as 0.4 m/s with an accuracy of +/- 3% (4% >20m/s).