Measuring, signalling, checking, controlling, monitoring and regulating apparatus and instruments for water-recycling and water-treatment plants, namely, chemical dosage dispensers, automatic fluid-composition control machines and instruments, automatic liquid-flow and liquid-level machines and instruments, automatic pressure control machines and instruments, centrifugal metering pumps, computer hardware and software for measuring, signaling, checking, controlling, monitoring and regulating apparatus and instruments used in water-recycling and water-treatment plants, automated process control system, namely, micro-processor based hardware and software used to monitor industrial processes, namely, water-recycling and water-treatment plants, electrical controlling devices, electronic valves for controlling fluids, electric control panels, electric meters, electromechanical controls for use in measuring, signaling, checking, controlling, monitoring and regulating apparatus and instruments in water-recycling and water-treatment plants, electronic equipment, namely, electrolysis cell for use in the manufacture of various ionic solutions, electronic-based instruments for measuring water quality, water filter controllers, water meters, apparatus and instruments for producing ion-exchange and electrolysis, and alarms for monitoring the above processes; except apparatus for measuring, counting, recording, controlling and accounting of the energy, heat, water, gas and current consumption

Apparatus and instruments for use in water-recycling and water-treatment plants, namely, machines and mechanical apparatus for producing ozone for water-treatment; machines and mechanical apparatus for producing chlorine dioxide for water-treatment; apparatus and instruments for use in water-recycling and water-treatment processes, namely, for use in disinfection, oxidation, desalination, filtration, deferrification, deacidification, demanganization, softening, fluorination, irradiation, reverse osmosis, ozonation, chlorine gas dosing, ion exchange, and biological water-recycling; accessories for the above mentioned apparatus, namely, gravity filters, air sterilizers and air purifying apparatus; except apparatus for measuring, counting, recording, controlling and accounting of the energy, heat, water, gas and current consumption