Air Flow Meter AM-4838 1).Measuring Range:0.4-30m/s 2).M/s,ft/h,ft/min,knots 3).Air Tempe.:-10-60C Air Flow Meter AM-4838 Product synopsisApplication: Installation, debug and repair for refrigeration industry, ventilation duct, environment monit-or, navigation measurement, weather forecast, collection of the weather datum for outdoor busywork and fire department.Model:AM4838