Electric, electronic and electrochemical apparatus and instruments, in particular measuring and remote control devices, namely buffer amplifiers, electrical railway transducers, high voltage transducers, signal conditioning devices for industrial process controls, signal conditioning devices for industrial and laboratory measurements, temperature transmitters, loop-powered and mains-powered electrical isolators for standard signals, electrical transducers for shunt applications, electrical repeater power supplies, universal electrical transmitters, strain gauge electrical transmitters, electrical resistance transmitters, AC/DC transducers, power supply units, electrical signal doublers, set-point alarm electrical relays, electronic indicator panels, electronic indicator boards; measuring apparatus for measuring the pH-value, redox potential, conductivity or oxygen contents of liquids, namely immersion fittings, flow-through fittings, inline fittings, retractable fittings, ball-valve fittings, liquid analyzers for measuring the pH-value, redox potential, conductivity or oxygen contents of liquids; sensors included in this class, namely pH sensors, electrical conductivity sensors, oxygen sensors, all not for medical use; parts of the beforementioned goods, namely calibration devices for calibrating measuring apparatus for measuring the pH-value, redox potential, conductivity or oxygen contents of liquids, industrial transmitters for measuring the pH-value, redox potential, conductivity or oxygen contents; all before-mentioned goods included in this class; all of the aforementioned goods only in the technological fields of industrial measurement, industrial process automation, laboratory measurement, laboratory automation, manufacturing automation and building automation, environmental measuring, medical engineering and traffic engineering; all of the aforementioned goods not in the field of office technology or office equipment