Patent ID: 7761243

Claim:
A measuring device for process technology, to be used in measurement and/or cleaning and/or calibration installations in the area of process automation, for measuring pH-values and/or redox potentials and/or other process parameters, comprising: a central unit; a central transmission line; at least one measurement module connected to said central unit by said central transmission line for transferring a data signal over said central transmission line from said central unit to said measurement module; a multiplexer; and a selection line associated with each measurement module for connecting its associated measurement module to said central unit and to said multiplexer, wherein: each measurement module is selectable by said central unit by one of said selection lines; said central transmission line and the selection line being different lines; each measurement module having a module transmission line connecting the measurement modules with inputs of said multiplexer; the multiplexer having an output, which is connectable with said central unit; and said multiplexer is controllable via said selection lines.