1,MA560B2 Anesthesia Machine 2,High-strength engineering plastic rack, ... N2O Stopper When using nitrous oxide, oxygen concentration>25%; When the oxygen pressure<0.2MPa, the flow of ... - time waveform, PEEP, inspiratory trigger pressure5. Monitoring of oxygen concentration (21%~100%)6. Security Alarm SystemOxygen Concentration alarm upper ... ±10% 50Hz±1Hz (UPS, Storage battery) MA560B2 Anesthesia Machine