9 Scientific, nautical, surveying, photographic, cinematographic, optical, measuring, signaling, checking, supervision, life saving and teaching apparatus and instruments, namely, electronic analyzers for measuring, testing and detecting contaminants and environmental pollutants, electronic-based instruments for measuring environmental parameters including humidity, pressure, mold, bacteria, air quality and water quality, level measuring machines for surveying, digital signal processors, emergency signal transmitters, signal conditioning and communication devices for industrial process control, environmental monitoring system comprised of meters and sensors that measure pressure, humidity, temperature and includes alarm and reporting functions, technical measuring, testing and checking apparatus and instruments for measuring testing and checking the temperature, pressure, quantity and concentration of gas and liquids; computers; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely, electric batteries, electric accumulators, electric transformers; apparatus for recording, transmission, reproduction of sound or images; blank magnetic data carriers, blank recordable optical discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus; electric surveillance apparatus, namely, automated self contained electronic surveillance devices that can be deployed to gather evidence or intelligence in remote locations; anti-intrusion alarms; electric apparatus for controlling and measuring sanitary drainage systems, namely, flow rate meters, liquid-level gauges, pressure gauges, thermometers, signal sensors, pressure transducers and transmitters that convert hydraulic or pneumatic pressure into analog electrical signals for monitoring and controlling hydraulic or pneumatic systems and pressure transducers and transmitters that convert electrical signals into hydraulic or pneumatic pressure for monitoring and controlling hydraulic or pneumatic systems