This pitot tube anemometer and differential manometer provides accurate air velocity, airflow and ambient air temperature measurements. The R3001 is capable of capturing maximum, minimum, average and relative readings and features a large dual LCD display with backlit functionality for low lit environments. Specifications: Pressure Range: ±5000 Pa; 0.752 psi; 50.00mbar; 20.07 inH2O; 509.8 mmH2O / Air Velocity Range: 1.00 to 80.00 m/s; 200 to 15,733 fpm; 3.6 to 288.0 km/h; 2.24 to 178.66 mph; 2.0 to 154.6 knots / Air Volume Range: 0 to 99.999 (CFM/CMM) / Temperature Range: 32 to 122°F (0 to 50°C).