Test instruments, equipment for test vehicles, for the most part consisting of high voltage supplies, HV voltage test instrumentation and HV test equipment for cables and cable systems, HV surge generators, phase angle test instrument, cable fault prelocating equipment, current supplies including current sources, search coils and differential search coils, electrical power filters, diode couplers, HV capacitors and capacitor systems (banks), spark gaps, integrated in test equipment, tone frequency generators, tone frequency transmitters and receivers for cable locating, electrical test and measurement instrumentation for the underground mining industry, particularly electric signal generators, pressure detectors, trouble indicators, control instrumentation, test vehicles for water plants, heating plants and environmental protection services, which contain flow detectors and flow analyzers, including transducers, pressure test equipment and pressure transducers, electrical test and recording instruments for flow measurement and pressure measurement, power supplies, power supplies for the alternative upper case of single ranges and for the simultaneous acquisition of all metrological data, movable and portable test instruments for the exact determination of damaged pipes on the handling noise principle and geophone principle, gas detection and gas leakage instrumentation, water leakage detectors, insulation test equipment, line locator for the location of metallic lines and synthetic material lines, leak locator for the location of water pipe breaks, leak locator for the prelocation of water pipe breaks, slide damper locator for the location of hidden slide damper, pressure detectors for the measurement of the working pressure in the pipe

Operation of training centres for the detection of cables and water conduits; testing of cables and cable systems; reconstruction of plans of installations; detection of cabledefects. Testing of pipe systems and putting up of water leakage analyses; construction of pipe and conduit plans; detection of leaks in distant heating installations, computer network surveillance

Measuring instruments, equipment for dynamo cars, essentially consisting of highvoltage generating, measuring and testing instruments for cables and cable installations, surge generators, phase angle measuring instruments, cable defect preliminary detectors, current generating units or grups (including current generators) difference probe coils, electric channel filters, cable burning devices, high voltage generators, banks of capacitors, discharges as components of measuring instruments, audio-frequency generators, emitters and recievers for cable detectors; electric measuring and testing instruments for the use in underground mining, more particular electric signal generators, pressure measuring instruments, disturbance indicators, operational monitoring systems; dynamo cars for checking water supply installations, distant heating installation, systems for environmental protection Containing measuring instruments as flow meters, including transducers, electric measuring and recording instruments as flow and pressure meters, current supply devices, mains switch fiels for selectively commutating the individual measuring ranges and simultaneously detecting all measurment data, ambulant and portable measuring instruments for the exact determination of pipe defects according to the principle of bone conduction and geophone, gas leak indicators; water leak indicators, slide valve cap and rod detectors, insulation measuring instruments; line finders for the detection of metallic and plastic lines, leak indicators for the detection of pipe fractures; leak indicators for the preliminary detection of water pipe fractures; slide cap detectors for the detection of concealed slide valve caps; pressure measuring instruments for measuring the working pressure in the water conduits; Lifting jacks for slide valve caps, more particular magnetic tools for slide valve caps all being goods included in Class 9