9 computer hardware, namely, instruments for monitoring, measuring, testing, diagnostic, data logging and surveying; computer hardware, namely portable and/or static data logging and surveying instruments for the measurement of prime parameters associated with air quality, namely, carbon dioxide, carbon monoxide, relative humidity, temperature, particulates, air velocities and delivered volumes of air; computer hardware, namely portable and/or fixed instruments for static monitoring, measuring, testing and diagnostic instruments all relating to the delivery of air systems and the adequacy of the aforesaid delivery, and parts and accessories for all of the aforesaid