Range 0.4 to 20 m/s Testo 410-2 Handy Vane Probe Anemometer Wind Speed Air Flow  Velocity/Temperature/humidity 0560 4102        Introduction  testo 410-2 is designed for the measurement of air flow velocity, temperature and humidity. Testo's own patented humidity sensor guarantees reliable measurement results. Thanks to the integrated measurement with the 40 mm vane, it is ideally suited for fast spot checks at air vents. A timed mean value calculation is possible. The measuring instrument is very handy, small and easy to operate.    Flow velocity measuring instrument with temperature measurement   Integrated measurement with 40 mm vane   Timed mean value calculation   Hold function and max./min. values   Windchill calculation for outside areas (perceived temperature)   Display illumination   Protective cap for safe storage   Including wrist strap and belt holder   Air humidity measurement with long-term stable Testo humidity sensor   Incl. dewpoint calculation and wet bulb   Incl. calibration protocol     Specifications                 Operating temperature     -10 to +50 °C           Battery type     2 batteries Type AAA(not included package)           Battery life     60 h           Dimensions     133 x 46 x 25 mm                  Probe type NTC           Meas. range     -10 to +50 °C           Accuracy     ±0.5 °C           Resolution     0.1 °C           Probe type humid. sensor, cap.           Meas. Range     0 to 100 %RH           Accuracy     ±2.5 %RH (5 to 95 %RH)           Resolution     ±0.1 %RH           Probe type Vane           Meas. Range     0.4 to 20 m/s           Accuracy     ±(0.2 m/s + 2% of mv)           Resolution     0.1 m/s