With its Aquaview, Christ offers a monitoring and evaluation system for water-treatment plants. Based on a special software integrated into the user interface, the system permits the implementation of comprehensive recorder functions as well as data acquisition, archiving and evaluation. Remote operation of the plant is also available as an option. The standardized user interface permits easy operation and also improves the reliability by external data evaluation and early detection of faults. The in-house costs for operation and maintenance of the pure water system are reduced. The recorder functions comply with the requirements laid down in 21 CFR Part 11. Long-term archiving of the data is supported: up to 520 million records can be saved on currently available memory cards.