... , convenient in operation.2. Display liquid level visually and continuously.3. It is convenient to set the upper and lower limit ... +CO2<8%)Medium Pressure: PN1.6, 2.5, 4.0, 6.3, 10.0, 16.0MPaMedium density: PN≤6.3MPa ρ≥0.6g/cm3 PN ... three parts as following: automatic drainage and monitoring system (electric type)