Air Flow Anemometer AVM-07(RS-232) 1).Air Velocity:0-45m/s (CFM,CMM) 2).m/s, ft/min, knots, Km/hr, mph 3).Tempe.Measurement Datalogging Air Flow Meter AVM-07(RS-232) with Free Shipping Flow (CFM,CMM) Instant, Ave, 2/3max Flow Measurement Velocity m/s, ft/min, knots, Km/hr, mph LCD Dual Display C/F Units Selectable RS-232 Interface Range of Wind Velocity: Auto RangeUnits Range Resolution Threshold ...