50 to 6,000 ft/min (0.25 to 30 m/s) 32 to 140°F (0 to 60°C) ±1% of reading ±4 ft/min (±0.02 m/s) ±2.0°F (±1.0°C) 1 ft/min (0.01 m/s) 0.1°F (0.1°C) Diameter 4 in. (100mm)