Test & measurement


from digital ph sensor to de facto industry standard for liquid analysis


The evoluTion of MeMosens Technology


By André Lemke, product manager for Endress+Hauser Liquid Analysis, Dr. Martin Freudenberger, product manager for Endress+Hauser Liquid Analysis, and Reinhard Huschke, Text & Co.


Practically all the data saved in Memosens


can be configured with warning and alarm thresholds so that the user can recognise early enough that the sensor is due for calibration, adjustment or replacement.


MEMoBAsE: EFFiCiEnT MAinTEnAnCE AnD CALiBRATion in THE LAB Another key milestone for even simpler maintenance was represented by the introduction of Memobase software in 2012. When installed, the software easily turns a PC or laptop into a multiparameter desktop measurement instrument for pH/redox, conductivity and dissolved oxygen. Up to four Memosens sensors can be connected and read out at the same time. Memobase creates measurement and calibration reports at the push of a button, thus permitting seamless measurement, calibration and test solution traceability, which is an additional enormous workload reduction and an important prerequisite for meeting the GMP guidelines. As soon as the sensor is connected to a PC


installed with Memobase, the software registers and stores its identity in a central database. Specific calibration and configuration limits can be defined for these sensors (or a group of sensors). If the sensor is reconnected at a later point, the corresponding template automatically opens. Memobase then guides the user step-by-step through the maintenance


Instrumentation Monthly November 2021


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process and thus minimises the risk of mishandling the sensor. The system supplies the user with explicit notifications regarding the status of the sensor and also shows, among other things, whether additional cleaning is required before it can be reinstalled. With the new Memobase generation that


will be introduced to the market this year, the extended diagnostic functions in Memosens 2.0 can be optimally analysed and evaluated.


MEMosEns 2.0: EnHAnCED DigiTAL FunCTionALiTy FoR inDusTRy 4.0 After more than 1.5 decades of development, Endress+Hauser is now presenting the next generation of its Memosens technology: Memosens 2.0. In terms of the underlying principle of storing all data in the sensor itself, nothing has changed, although the opportunities for data storage and analysis


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