... /s anemometer temperature humidity. VA8020 Temperature/Vane anemometer Measure: m/s, km/h, fpm, mph, kts, Beaufort scale ... 1°C, 0.1°F Range: 0.4~20 m/s, 80~4000 fpm Sample Rate: 0.5sec ... x 30mm Weight: 180gVA8021 Temperature/Humidity/Vane anemometer Measure: m/s, km/h, fpm, mph, kts, Beaufort, ... .1°C, 0.1°F Range: 0.4~20 m/s, 80~4000 fpm, 0~100%RH, - ... .1°F ,1m^3/s Range: 0.4~20 m/s, 0~99999m^3/s, -10~50°C ...