The invention relates to a breathing apparatus (15), which is connected to a sensor system (30) and to a control system (24), wherein the sensor system (30) is designed for capturing at least two items of measurement data (31) and for transmitting the captured measurement data (31) to the breathing apparatus (15) or the control logic module (25). The control system (24) is further connected to at least one indicating device (35), wherein the at least one indicating device (35) has a configurable screen (33). The control system (24) is designed for the presentation of indicated data (62, 65) based on the captured measurement data (31), which may be displayed on a first graphical unit (29) on the at least one indicating device (35). The invention furthermore relates to a method for controlling a breathing apparatus (15).