... -Luminance LCD Display, And Keys Conditioning Means Double-End Pressure-Flow Sensor, Such As Tidal Volume, Minute Volume, Respiratory Rate and Airway ... ),Tidal Volume: 0, 20~1500ml Part of Flow MeterO2/N2O/Air Six -Tube Flow Meter Linkage of O2 and N2O; Keep Oxygen ... of Concentration Regulation: 0.2~5%VOL Automatic Compensation of Flow, Temperature and Pressure Self-Lock and Interlock Volume: 180ml GSM ...