Electric stirrers for liquids; cleaning devices for cleaning stirrers for liquids; cleaning devices for cleaning process, pH, redox, conductivity, oxygen, turbidity and TOC sensors and/or electrical, electronic, electrochemical, physical and pneumatic measuring devices; cleaning devices for cleaning measuring, installation, immersion, through-flow and replacement fittings for electrochemical and physical measuring purposes.

Electrical, electronic, electrochemical, physical and pneumatic measuring, control, protection, monitoring, regulating, display and switching devices, apparatus and instruments and parts thereof; electrical and electronic converters, particularly measuring transducers; electrical and electronic amplifiers, transformers [electricity], isolators, current and voltage transmitters; host computers and field devices; coupling elements, particularly inductive coupling elements; plug-in connectors; stirrers for liquids for laboratory purposes; process analysers; process sensors; pH, redox, conductivity, oxygen, turbidity and TOC sensors; fittings, namely measuring, installation, immersion, through-flow and replacement fittings for electrochemical and physical measuring purposes, in particular for liquid analysis; laboratory cleaning equipment for cleaning all of the aforementioned goods and parts thereof; calibration and testing devices for adjusting and testing the aforementioned goods and parts thereof, in particular calibration and testing impedance; safety devices, apparatus and instruments; control devices, apparatus and instruments; electrolyte measuring devices; electrode-based measuring devices; data processing devices, systems, programs and user interface devices for controlling, configuring and calibrating the aforementioned goods and for recording data, in particular measurement and calibration data; measuring systems and installations consisting of the aforementioned goods.