Gas and liquid flow and temperature sensors; lasers; signal processors; computers; preamplifiers; polarization axis finders; computer programs and interface units for use with anemometers, namely, for collecting, processing, analyzing, storing, and presenting data from anemometers and anemometry instruments; manometers; gas flow and velocity test instruments; mass flow transducers; air velocity transducers, signal conditioners, air velocity meters; air velocity meter calibrators; wind velocity sensors; intelligent flow analyzers featuring microchips, for measuring flow rate and accumulation of liquids and gases; air pollution measuring and/or control instruments; aerosol neutralizers; condensation nucleus counters; electrical classifiers; electrostatic aerosol samplers; isokinetic dust samplers; electronic respirable aerosol mass monitors; particle impactors; computer programs and interface units for use with particle technology instruments, namely, for collecting, processing, analyzing, storing, and presenting data from instruments measuring particle size and/or concentration; computer programs and interface units for use with particle technology instruments, namely, for collecting, processing, analyzing, storing, and presenting data from instruments measuring particle size and/or concentration; measurement instruments for use in determining aerodynamic particle size; clean room particle counters; optical particle counters; differential mobility particle size analyzers; fume hood controllers; monitors for measuring the velocity of particles moving in a media; surface motion monitors; room pressure sensors; room pressure controllers; wind tunnels; flow calibrators; mass flow meters; ventilator test instruments; condensation particle counters; surface area monitors; lung deposition monitors, namely, an aerosol characterization device used to infer inhaled particulate uprate; mass flow meters to measure air flow in exposure monitoring applications; electronic instrumentation used in industrial hygiene and occupational exposure monitoring applications; in situ particle sizing instruments; velocity measurement devices; nanoparticle/macromolecule generators; aerosol and dust monitors; generators and dispensers; sound level meters and detectors; hospital room pressure monitors; heat stress monitor; airflow air capture hood; noise indicator; laboratory room controller; fume hood monitor; environmental monitor; noise dosimeter; balometer capture hood; ventilation meter; laser photometer; aerosol monitor; air quality monitor; vaporizers; computer cables