... the calculation, measuring temperature and relative air Air Flow AnemometerDigital anemometer in measure wind ... measurement in the basic instruments, heating, ventilation, air conditioning, environmental protection, energy conservation monitoring, ... 3%±0.1 dgtsAuto power off√√Air velocity unit m/s, Ft/min, Knots, ... Km/hr,Mphm/s, Ft/min, Knots, Km/hr,MphBack light√√Max / min air ...