pH electrode management system

Memobase is an electrode management system for pH electrodes that is designed to give users insight into their reliability, performance and estimated lifetime.

Endress+Hauser’s Memosens-based pH electrode technology is the digitisation of the analog measuring signal directly in the electrode. The ‘smart’ electrode head is now where the actual pH values are determined and digitally transmitted to the transmitter, removing real pH-offset-error due to the older analog technology.

Memosens technology makes it possible to pre-calibrate any and all of the online pH electrodes at a central calibration station. Pre-calibration can now be performed in the laboratory or workshop as calibration at the measuring point is no longer necessary. When Memobase is added to this central calibration station, the benefit is that for each pH electrode on site, an audit trail and database is stored in a report format on a conventional spreadsheet. This audit trail is a record of all past and current calibration dates, commissioning dates, operating hours and additional electrode information. Operators can now identify early-warning-failure patterns from the line-graph chart that incorporates all historical calibration data, including dates and times of each event.

Recorded information specific to each measuring point can be reviewed (electrode slope degradation) revealing new information regarding that specific online process. For example, the rate at which the pH electrode deteriorates gives information on the process conditions. This information, specific to a particular tag, is recorded and can be printed out in a report.