9 Electrical and electronic measuring and control instruments for centralized and decentralized measurement, control, monitoring, display and transmission of energy supply data and energy consumption data, in particular of water, gas, heat, temperature, humidity and electricity supply and consumption data, all the foregoing instruments being electronic devices in the nature of energy meters and sensors for tracking and monitoring energy usage and electric control devices for energy management; flow meters, flow rate meters, gas concentration meters; electrical and electronic temperature sensors; electrical regulation and control apparatus for regulating and controlling the distribution and use of electric current for devices used in connection with water pipes, gas pipes and heating and ventilation devices; interface modules, namely, user interfaces in the nature of electric control panels for use in the control of regulating and control valves, shut-off valves, control valves and thermostatic valves; interface modules, namely, user interfaces in the nature of data processing couplers; safety devices, in particular gas concentration detectors, protection devices and signaling devices, in particular emergency signal transmitters, digital signal processors and signal whistles, gas detectors for detecting the presence of gas; control units and switching units for safety, protection and signaling devices and gas detectors, namely, flow switches for monitoring and controlling the flow of gases or liquids and electronic valves for controlling gas or fluids; sensor units for safety, protection and signaling devices and gas detectors, namely, gas sensors for measuring gas concentration and safety sensors in the nature of carbon monoxide detectors; electrical and electronic components for electronic data processing, namely, data processing equipment; evaluation circuits, in particular in the form of printed circuit boards; data processing equipment, namely, process couplers; technical measuring, testing and checking apparatus and instruments for measuring, testing and checking the temperature, pressure, quantity and concentration of gas and liquids; electrotechnical and electronic signaling and warning devices, namely, emergency signal transmitters, electronic warning bells, electronic warning light systems; optical and acoustic signaling, warning and display devices for displaying and transmitting and communicating data collected with the aforementioned goods and emergency situations in relation to gas detectors, in particular emergency signal transmitters, electronic sound alarms, electronic warning lights system and electronic display interfaces; electrotechnical and electronic small switchgear, in particular manual electric switches, electric microswitches, electrical components in the nature of small contactors and relays, all either with mechanical contacts or with contactless electronic switching; downloadable computer software for operating the aforementioned electric and electronic water, gas, heat, temperature, electricity and humidity regulating and controlling meters, sensors, data processing equipment, electronic controllers, signal transmitters, alarms and detectors, in the field of safety, protection and signaling devices and gas detectors; all the aforesaid goods for safety, fire protection, environmental protection and operation of dispensing equipment, refrigeration equipment, heating equipment, hot water treatment equipment, production facilities, logistics equipment, in particular transport equipment and storage facilities for the beverage industry, the cleaning industry, the packaging industry, the transport industry, the chemical industry and the food processing industry; time clocks being time recording devices