9 Scientific apparatus and instruments, namely, electric sensors, electronic transmitters and receivers, electronic data recorders, and data processors, for inventory control, automatic liquid flow control in domestic waste water treatment networks, rain water supply networks, drinking water supply networks, sewers, rainwater storage basins and flood discharge basins, tracking of temperatures, recognition and detection of speed, geographical location, load and parking position of trucks and trailers, and detection of fuel variations in tanks; electronic components in the nature of electric data sensors, electronic data recorders, data processors, electronic data transmitters and receivers, probes, ultrasonic probes not for medical use, and acoustic generators for probes in the nature of an apparatus for wireless transmission of acoustic information, for wired and wireless electronic apparatus for inventory control, flow control in purification networks, tracking of temperatures, recognition and detection of trucks and trailers, and detection of fuel variations in tanks; components of electronic measuring and monitoring apparatus in the nature of electric sensors, electronic transmitters and receivers, electronic data recorders, data processors, probes, ultrasonic probes not for medical use, and acoustic generators for probes in the nature of an apparatus for wireless transmission of acoustic information, for wired and wireless measuring and monitoring apparatus for inventory control, flow control in purification networks, tracking of temperatures, recognition and detection of trucks and trailers, and detection of fuel variations in tanks; mechanical apparatus and instruments, namely, electric sensors, electronic transmitters and receivers, electronic data recorders, data processors, probes, ultrasonic probes not for medical use, and acoustic generators for probes in the nature of an apparatus for wireless transmission of acoustic information, for inventory control, automatic liquid flow control in domestic waste water treatment networks, rain water supply networks, drinking water supply networks, sewers, rainwater storage basins and flood discharge basins, tracking of temperatures, recognition and detection of speed, geographical location, load and parking position of trucks and trailers, and detection of fuel variations in tanks; data processors and computers; computer software for inventory control, flow control in purification networks, tracking of temperatures, recognition and detection of trucks and trailers, and detection of fuel variations in tanks; scientific apparatus and instruments based on radio-frequency identification, namely, radio-frequency identification tags, and apparatus and instruments for communicating with radio-frequency identification tags, namely, RFID readers, RFID transmitters, RFID receivers, and RFID recorders