Anesthesia Machine consists of anesthetic gas delivery system, anesthetic gas delivery device (optional Draeger evaporator or Penlon evaporator enflurane, isoflurane, sevoflurane, desflurane and isoflurane, five kinds of anesthetics) anesthesia ventilator, electronic flow-meter assembly, anesthesia and ventilation systems, anesthesia gas purification system transmission and collection system, module monitoring (optional AG module, CO2 module, BIS module and multi parameter patient monitor). Precise setting of semi-electronic flow-meter, accuracy and stability ensured by high quality key components, real-time calibration to ensure accuracy.