9 Air analysis apparatus; Air quality measurement apparatus, namely, particle counters; Apparatus for analysing gases; Atmospheric oxygen monitors; Automotive measuring instruments, namely, water temperature gauges, air fuel/ratio gauges, boost gauges, vacuum gauges and exhaust gas temperature gauges; Chemical vapor deposition apparatus for use in research; Computer-controlled apparatus for testing and measuring concentrations of gas and liquids; Electric and electronic video surveillance installations; Electrical equipment for the genetic modification of cells for research purposes; Electronic valves for controlling gas or fluids; Flow switches for monitoring and controlling the flow of gases or liquids; Flue gas analyzers; Gas chromatography apparatus for laboratory use; Gas detectors for detecting the presence of gas; Gas flow meters; Gas flow monitors; Gas sensors for measuring gas concentration; Gas testing instruments; Residual gas analyzers; Snorkels; Technical measuring, testing and checking apparatus and instruments for measuring, testing and checking the temperature, pressure, quantity and concentration of gas and liquids; Wind indicator, namely, powder for use in detecting and analyzing air currents; Wind indicator, namely, smoke for use in detecting and analyzing air currents, Air analysis apparatus; Air quality measurement apparatus, namely, particle counters; Apparatus for analysing gases; Atmospheric oxygen monitors; Automotive measuring instruments, namely, water temperature gauges, air fuel/ratio gauges, boost gauges, vacuum gauges and exhaust gas temperature gauges; Chemical vapor deposition apparatus for use in research; Computer-controlled apparatus for testing and measuring concentrations of gas and liquids; Electric and electronic video surveillance installations; Electrical equipment for the genetic modification of cells for research purposes; Electronic valves for controlling gas or fluids; Flow switches for monitoring and controlling the flow of gases or liquids; Flue gas analyzers; Gas chromatography apparatus for laboratory use; Gas detectors for detecting the presence of gas; Gas flow meters; Gas flow monitors; Gas sensors for measuring gas concentration; Gas testing instruments; Residual gas analyzers; Snorkels; Technical measuring, testing and checking apparatus and instruments for measuring, testing and checking the temperature, pressure, quantity and concentration of gas and liquids; Wind indicator, namely, powder for use in detecting and analyzing air currents; Wind indicator, namely, smoke for use in detecting and analyzing air currents; Apparatus for testing gas, liquids and solids