9 Measuring apparatus and instruments, namely, gasometers, pressure measuring apparatus; flowmeters; flow selectors, namely, electric flow control installations and flow regulators for commercial use; pressure gauges and pressure indicators; safety oxygen distribution regulators; manometers; contact manometers; pressure sensors and piezoelectronic pressure sensors; measuring, detecting and monitoring instruments, indicators and controllers, namely, level, resistance and temperature measuring instruments, and instruments for measuring, testing and checking the temperature, pressure, quantity and concentration of gas and liquids; gas detectors, infrared detection apparatus; alarm monitoring systems; electronic monitoring systems for monitoring flowmeters, electric currents and electrical signals, and for collecting operational data and settings from gas and liquids delivery systems; pressure monitoring instruments, namely, pressure recorders; flow monitoring instruments, namely, industrial gas flow monitors; pressure monitors in the nature of pressure sensors and pressure transmitters; gas flow monitors;pressure regulators, namely, high pressure regulators, line pressure regulators, cylinder pressure regulators, back pressure regulators, single-stage pressure regulators, dual-stage pressure regulators all for industrial purposes; pressure gauges; aneroid pressure gauges; contact pressure gauges; gas supply electronic indicator panels; solenoid valves; flow meters; flow controllers and mass flow controllers, namely, gas flow meters; flow switches for monitoring and controlling the flow of gases or liquids; alarm monitoring systems for gas and gas insufficiency; control devices, namely, electrical controlling devices; signal devices, namely, signal conditioning and communication devices for industrial process control; signaling transmitters and receivers, namely, wireless transmitters and receivers; cylinder scales; vacuum generators, namely, suction ejectors being valves for controlling and regulating the flow of gases or liquids not being parts of plumbing, heating, cooling installations or machines; downloadable software for connecting to, monitoring and controlling medical apparatus and instruments and medical gas apparatus and instruments, and for connecting to, monitoring and controlling the operation of gas equipment, gas supply, gas distribution and medical gas supply and distribution, healthcare gas supply and distribution, industrial gas supply and distribution and high purity gas supply and distribution; apparatus, instruments and installations in the nature of computer hardware for connecting to, monitoring and controlling medical apparatus and instruments; electric, electronic and photoelectronic sensors; liquid level sensors; motion detectors; infrared detectors and gas detectors; wireless alarm sensors; pressure sensors and motion detectors for monitoring and obtaining of information; monitors, receivers, remote control receivers, electric and electronic devices in the nature of wireless receivers and transmitters for monitoring and controlling the function, performance, status and location of other electrical or electronic devices or systems, apparatus or instruments; devices in the nature of wireless receivers and transmitters for transmission of clinical information; safety screens, protective helmets, welding helmets and safety goggles for torch welding; protective helmets; welding helmets; autodarkening welding helmets; hand shields in the nature of protective work gloves; protective workwear in the nature of clothing for protection against accidents, irradiation and fire; earthing clamps in the nature of earth terminals; electric and electronic cables and cable connectors; copper electric cables; electrical control panels and terminal blocks; gas savers in the nature of shut off valves, gas alarms and gas leak alarms, and electronic gas conserving devices being electronic valves for controlling gas; signaling apparatus for the optical and acoustic indication of gas limit warnings, namely, gas alarms and gas leak alarms