Ambient temperature : -40～+55°C Humidity : 30～90% Max flow : 50L/min Accuracy : ±0.3% Repeating error : ≤0.15% Inlet pressure : ≥54kPa Outlet pressure : ≤0.3MPa Power: 380V 50Hz (220V to be optional) Noise:≤80dB(A class) Unit price range : 0.01～99.99 Single volume range : 0.01～9999.99 Accumulative volume range : 0.01～9999999999.99 Explosion-proof certifcate : CE011195 Explosion-proof sign : Exdm II AT3