Physical, optical, electro technical, electronic and hydro technical measuring, signaling, checking and operating apparatus and measuring instruments, namely, hydrological and hydrometeorological instruments, namely, hydrometer; instruments and equipment for measuring flow velocity, namely, mechanical current meter, electrical current meter, electromagnetic current meter, electro acoustic ultrasonic current meter, ultrasonic side looking Doppler sensors for fixed installation and mobile ultrasonic Doppler systems for vertical velocity profile measurement comprised of ultrasonic transducer and digital signal processing unit; intelligent sensors for measuring water level, conductivity, temperature; pressure heads, namely, pressure gauges, temperature probes; devices for measuring precipitation, namely, disdrometer and rain gauges; devices for measuring water level, namely, water meters, staff gages, radar sensors for continuance, bubble-in sensors for continuance, namely, sensors that use compressed air or air pressure to determine indirect water level; unattended devices for monitoring of ground water level, namely, ground water data logger; devices to measure ground water level by hand, namely, contact gauges; electronic coding devices for encrypting and decrypting angles, namely, shaft encoders; data-collecting devices, namely, computer software for the collection of data and datalogger for logging of environmental monitoring parameters, namely, water level, amount of rainfall, air temperature, air humidity, wind speed, wind direction, water quality parameters; data transmission devices, namely, modems, digital transmitters used for GSM data transmission for surface and ground water monitoring, and satellite transmitters; data processing equipment in the form of printed circuits; devices for collecting measured data, namely, field handheld transmission devices and processors, namely, computer software for collection of data, modems, and data processors; display units for measured data and data programs stored on data processors of all kinds, namely, electronic messaging display unit for displaying measured data and data programs; measuring devices for measuring the quality of water

Installation, maintenance and repair services of data processors, modems, intelligent sensors, measuring instruments; all for measuring the quality and amount of water

Calibration and functional testing of measuring devices; EDP-programming services; computer programming for data processing; installation, maintenance and repair of software