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Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus.
fire and explosion containment and prevention apparatus, namely, explosion isolation valves, no return valves, explosion vents, domed explosion vents, pyramid explosion vents, fire break shutters, and high speed abort gates, all for use with industrial and commercial ventilation systems; electronic systems for controlling fire break shutters based on sensing signals from a spark, flame, pressure, and temperature sensors; spark detection and extinguishment systems, for use with industrial and commercial ventilation systems, for detecting and extinguishing sparks and burning materials for use with industrial and commercial ventilation systems; sensors for monitoring flames, dust, and temperature, for use with industrial and commercial ventilation systems; spark detection and extinguishing systems, spark detectors, water-based spark and fire extinguishing systems, dry chemical spark and fire suppression systems, thermal probes for fire detection purposes, temperature monitoring systems comprised of sensors and meters, primarily installed in dust collecting and industrial ventilation systems, for measuring environmental temperature, emission monitoring systems comprised of sensors and meters, primarily installed in dust collecting and industrial ventilation systems, for measuring emissions levels, dust probes for dust sensing and detection purposes, broken bag detectors for sensing levels of particulate and dust in air flow, fire isolation equipment, namely, fire break shutters and firebreak dampers for fire containment purposes, and fire extinguishing equipment, namely, water-based fire extinguishing systems, dry chemical fire suppression systems