... x 30mm Weight: 180gVA8021 Temperature/Humidity/Vane anemometer Measure: m/s, km/h, fpm, mph, kts, Beaufort, %RH, ... Range: 0.4~20 m/s, 80~4000 fpm, 0~100%RH, -10~50°C, 14~122°F ... Accuracy:±(2% of reading + 0.3m/s)±(2% of reading + ... 0.1°F ,1m^3/s Range: 0.4~20 m/s, 0~99999m^3/s, -10~50°C, 14~122°F ... Accuracy:±(2% of reading + 0.3m/s)±(2% ...