NHA-500 Nitrogen Hydrogen Air Generator Nitrogen purity: oxygen amount less 3PPM, dew point: -56? Nitrogen Flow: 0 – 500ml/min Nitrogen Pressure: 0.4MPa Hydrogen purity: 99.999% Hydrogen Flow: 0 – 500ml/min Hydrogen Pressure: 0.4MPa Air Flow: 0 – 2000ml/min