Kestrel 3000 Pocket Wind/Weather/Hydrometer

This pocket sized instrument contains modes to measure wind speed, temperature, wind chill, relative humidity, heat index, and dew point temperature. This unit also contains an external thermistor for fast temperature response. A hard, slip-on case protects the display, buttons, and impeller from damage. 

Wind speed range: 0.7–89 mph, ±3% accuracy
Temperature range: -15°C to +50°C; accuracy for temperature and wind chill: ±1°C
Relative humidity: ±3%
Dew point temperature: ±2°C
Heat index: ±3°C