The invention relates to a gas delivery system, comprising a PAP device and at least one removable sensing device.The PAP device comprises a gas abortion generator.To provide a pressurized respirable gas,1. User interface,Including a gas delivery pipe connected to the gas flow generator,And a mask connected to the gas delivery pipe,To receive a respirable gas from the gas flow generator,The pressurized gas is provided to the user's breathing airway.One processor,Preload a program.To control the therapeutic pressure of the pressurized breathing gas provided by the air flow generator,And a connector,The removable sensing device can be electrically connected.In addition,The removable sensing device includes at least one sensor.Combined with the user interface,To measure a breath feature on a gas supply path between the user's breathing airway and the airflow generator,A front-end analog circuit,To process the characteristics measured by the sensor,To generate signals to the PAP device,And a connector,The PAP device can be electrically connected.Therefore,When the PAP device is not connected to the removable sensing device,The preloader of the processor runs a first default supply mode.To control the treatment pressure,And when the PAP device is connected with the removable sensing device,The preloader in the processor will run a second control air supply mode.At this point,The processor will acquire the signal from the removable sensing device.And adjust the treatment pressure according to the respiratory characteristics obtained from the signal.本發明相關於一種氣體遞送系統，包括一PAP裝置以及至少一可移除式感測裝置。該PAP裝置包括一氣流產生器，以提供一加壓可呼吸氣體，一使用者介面，包括一連接至該氣流產生器的氣體遞送管，以及一連接至該氣體遞送管的面罩，以自該氣流產生器接收可呼吸氣體，並將該已加壓的氣體提供至使用者的呼吸氣道，一處理器，預載一程式，以控制該氣流產生器所提供之該已加壓可呼吸氣體的治療壓力，以及一連接器，可電連接該可移除式感測裝置，另外，該可移除式感測裝置包括至少一感測器，結合於該使用者介面上，以測量介於使用者呼吸氣道與該氣流產生器間的一供氣路徑上的一呼吸特徵，一前端類比電路，用以處理該感測器所測得的特徵，以產生輸入至該PAP裝置的訊號，以及一連接器，可電連接該PAP裝置，因此，當該PAP裝置未與該可移除式感測裝置相連接時，該處理器的該預載程式會執行一第一預設供氣模式，以控制該治療壓力，以及當該PAP裝置與該可移除式感測裝置相互連接時，該處理器內的該預載程式會執行一第二調控供氣模
