9 Hand-held exhaust emissions testers; portable test equipment, namely, apparatus for detecting and measuring gas pressure, air quality, gas leaks, gas presence, and gas concentration; infrared benches in the nature of infrared sensors; scientific, electrical and electronic apparatus and instruments for calibration of test equipment, displaying and printing data, and for monitoring, recording, indicating, data logging, analysing, sensing, detecting, measuring, checking, and metering of ambient gases, exhaust gases, environmental gas, exhaust emissions, combustion efficiency, and air quality, namely, flue gas analysers, gas leak detectors, gas pressure meters, indoor air quality meters, and vehicle emission testers; scientific, electrical and electronic apparatus and instruments for measuring and testing electrical circuits and electrical currents, but not modifying the electrical input into said electrical circuits and electrical currents, namely, multimeters, clamp meters, and non-contact voltage testers; combustion probes, namely, accessories specifically adapted for electronic devices used to detect the presence and concentration of gases post-combustion; combustion efficiency analysers and combustion testing equipment for measuring combustion; automotive emissions analysers; portable diesel smoke meters; hazardous gas detectors with audible and visual alarm and indicators for detecting the presence of gases; downloadable software for automating email communications, automating appointment scheduling, invoicing, reporting, collaboration, customer relations management, customer data management, and computer data backup; downloadable software for controlling, communicating with, reporting of data from, retrieving data from, and viewing data from, portable gas measuring and analysing devices and probes therefor; downloadable software for controlling, communicating with, reporting of data from, retrieving data from, and viewing data from, portable gas measuring and analysing devices, namely, carbon monoxide, airflow, temperature, and humidity detectors; computer hardware; downloadable mobile applications for automating email communications, automating appointment scheduling, invoicing, reporting, collaboration, customer relations management, customer data management, and computer data backup; apparatus for recording, transmission or reproduction of sound or images; computer hardware and downloadable software for parallel processing, digital signal processing, and image processing, in the fields of exhaust gas engineering, plumbing, and heating engineering; downloadable software for exhaust gas analysis; Electric and electronic video surveillance installations; security and access control apparatus and instruments, namely, hazardous gas detector for detecting the presence of gases and containing warning instrument that produces audible tone when preset concentrations of gases are detected or exceeded in the form of an identity badge holders; parts, fittings and accessories specifically adapted for all of the aforesaid goods