9 Instruments for measuring, signaling, checking, namely, accelerometers, actinometers, ammeters, anemometers, audiometers, barometers, calorimeters, densimeters, dynamometers, electricity meters, electrometers not for medical purposes, ellipsometers, energy meters for tracking and monitoring energy usage, hygrometers, infrared thermometers not for medical purposes, load cells, lux meters, manometers, mass flow meters, mass spectrometers, digital multimeters, nephelometers, ohmmeters, pH meters, potentiometers, psychrometers, pycnometers, pyranometers, pyrometers, radiometers, rotameters, seismometers, mass spectrometers, speedometers, thermometers not for medical purposes, vacuum gauges, viscometers, voltmeters, wattmeters, weighing scales, temperature sensors, humidity sensors, pressure sensors, spark sensors, metal detectors, vibration sensors, wind sensors, particle sensors, electronic devices, namely, energy meters for tracking and monitoring energy usage, flow meters, speed sensors, light systems comprising light sensors and limit switches, light barriers, conductivity sensors; measuring, signaling, monitoring and control equipment for machines, including data transfer to smartphone applications, namely, computer application software for data recording, data analyzing, data reporting, graphic displaying of data, plant management function including monitoring, controlling and maintenance support, central monitoring and controlling systems, and computer application software for data recording, data analyzing, data reporting, graphic displaying of data, plant management function including monitoring, controlling and maintenance support, building management systems and computer application software for data recording, data analyzing, data reporting, graphic displaying of data, plant management function including monitoring, controlling and maintenance support, and for the automated digital controls of air handling units and filtration equipment; systems and equipment for carrying out microbiological processes, namely, water quality meters; mechanical devices for detecting sparks, namely, fire protection systems comprised of spark detectors and fire extinguishers