measuring instruments, open-loop, closed-loop systems and monitoring instruments especially for use in the chemical and petrochemical industries, thermal power stations, iron and steel works, electrical engineering and power generating plants; analyzers not including those for medical purposes, namely automatic gas and liquid analyzers; pH measuring instruments, conductivity measuring instruments, primary elements (sensors) for measuring physical and chemical qualities of gases and liquids, analyzing systems mainly consisting of gas sampling instruments, of gas conditioning and automatic calibration devices; gas chromatographs; recording instruments, namely continuous-line recorders, multipoint recorders, fault recorders, accesssories for aforementioned instruments, namely chart paper, pens and ribbons; sensors and transmitters for temperature and mechanical variables like rotational speed, and position; reference junction thermostats; amplifiers for electrical isolation of measured analog signals; sensors and transmitters, namely for pressure, differential pressure, flow rate, humidity, liquid levels as well as transmitter supply units; transmitters for electrical variables such as current, voltage, availalbe power, resistance, frequency; instruments for long-distance transmission of measured values; relays, time relays, alarm relays and control instruments, measuring relays, protection relays and selective protection relays for energy distribution plants; text display units; electrical and electronic measuring amplifiers and boosters; servo-control instruments, positioners, actuators and control actuators for valves, vanes and comparable setting equipment including their associated electronic drive systems; analog and digital computers, especially for processing the measured value; controllers, especially electronic continuous controllers, on/off controllers, digital controllers, controllers for industrial application, control systems consisting of integrated electrical and electronic instruments within a functional chain consisting mainly of sensors, transmitters, controllers, boosters, actuators and final control elements for open-loop, closed loop control of industrial installations, including their associated panels switching cabinets and consoles; instruments for liquid level and density measurements on the basis of radioactive radiation, nuclear radiation measuring instruments, sensors for measuring radioactive radiation and the systems composed thereof; measuring instruments with electronic function or with optical transmission medium, electronic measuring instruments having analog or digital read - out, multimeters, clamp-on meters for direct electrical protection, measuring bridges, compensation devices, calibrators, electrical measuring instruments for locating faults; accessories for measuring instruments and controllers, namely remote-controlled set point adjusters, remote control instruments, solenoid valves and automatic valves, power supply instruments, signal distributon instruments, electrical circuits for protection against overvoltaging, measuring point selector switches; mounting material for measuring instruments and controllers, namely distribution and protection boxes; process control plants for process automation mainly consisting of process interface cards, central process units, storage cards, operator keyboards and data output peripherals, especially in the chemical, petrochemical, steel/iron, mineral industrials, power stations, for monitoring, operating, open-loop and closed-loop control, protecting, signalling, the afore-mentioned plants with centralized or decentralized structure as well as in hierarchical structures with data highway and digital communication, including such associated output instruments like screens, printers and plotters; computer programs stored on discs, namely for automation engineering; data storage medium equipped with computer programs for automation engeneering; pre-recorded audio and video tapes featuring computer program descriptions

documentation, namely books and pamphlets featuring computer program descriptions

installation, maintenance and repair of control systems and process control systems and instruments included therewith

educational services, namely organizing conducting training courses, classes conferences and seminars in the field of measuring technology and process automation and distribution of course material therewith

research and design for others of computer programs in the field of automation engineering; design for others of process control systems