The invention relates to a device for measuring and/or monitoring a physical or chemical process variable, comprising a measuring and/or monitoring appliance (2), at least one memory unit (3) and one display, input and/or output unit (4; 5). The at least one memory unit (3) is embodied as a non-volatile, writable memory. Information (13) relating to the firm, device and/or process is or can be stored in the at least one memory unit (3). Desired information (13) can be called by the display unit (4) or by the input/output unit (5) and/or can be automatically displayed according to a defined state of the measuring and/or monitoring appliance (2). Said information (13) is represented on the at least one program side (12) or is output when the at least one program side (12) is called.