Analytical and measuring apparatus and instruments for general purposes, namely, pH meters, conductivity meters, salt meters, ion meters, oxygen meters, salinity checkers, pH electrodes, ion selective electrodes, non-contact infrared thermometers; Apparatus and instruments for process control and energy, namely, process pH/ORP analyzers, pH sensor assemblies, pH analyzers, conductivity monitors, dissolved oxygen monitors, turbidity monitors, silica monitors, silica analyzers, dissolved oxygen analyzers, trace sodium ion monitors, hydrazine monitors, phosphate analyzers, process gas analyzers, thermal conductivity gas or hydrogen analyzers, magnetopneumatic oxygen analyzers, paramagnetic oxygen analyzers, burner emission analyzers, infrared gas analyzers; Electronic and information apparatus and instruments for electronics, new material and semiconductor industries, namely, energy dispersive x-ray analyzers, X-ray fluorescence analyzers, carbon analyzers, carbon/sulfur analyzers oxygen/nitrogen/hydrogen analyzers, particle size distribution analyzers, gas pycnometers, reticle/mask particle detection systems comprising laser scattering and pattern discrimination and mapping on CRT, wafer flatness analyzers, liquid particle counter, ultra-pure water monitors, trace gas monitors, semiconductor impurity analyzers, mass flow controllers, vaporized liquid source control systems comprising mass flow controllers for delivery of vapor pressure liquid, optical crystals, scintillation crystals, X-ray detectors, pyroelectric infrared detectors, thermopile detectors, intelligent tachometers; Apparatus and instruments for food industry, agriculture, forestry and fisheries, namely, salinity meters, calcium hardness meters, dissolved oxygen checkers, plant photosynthesis analyzers; Living environment and pollution monitoring and analyzing apparatus and instruments, namely, monitors to measure gas and dust; Apparatus and instruments for vehicle engines, namely, automotive emission analysis systems comprising flow controller and analyzers, volume samplers, automotive emission analyzers, infrared gas analyzers, air-fuel ratio analyzers, vehicle emission test systems comprising computer hardware and software for processing emissions data, emission test processors, engine performance test systems comprising analyzers for data collection and processing, DC chassis dynamo-meters, sealed housing for evaporative determination, gas purifiers and gas dividers

Repair and maintenance services for analytical and measuring apparatus and instruments for general purposes, namely, PH meters, conductivity meters, salt meters, ion meters, oxygen meters, salinity checkers, PH electrodes, ion selective electrodes, non-contact infrared thermometers; apparatus and instruments for process control and energy, namely, process PH/ORP analyzers, PH sensor assemblies, PH analyzers, conductivity monitors, dissolved oxygen monitors, turbidity monitors, silica monitors, silica analyzers, dissolved oxygen analyzers, trace sodium ion monitors, hydrazine monitors, phosphate analyzers, process gas analyzers, thermal conductivity gas or hydrogen analyzers, magnetopneumatic oxygen analyzers, paramagnetic oxygen analyzers, burner emission analyzers, infrared gas analyzers; electronic and information apparatus and instruments for electronics, new material and semiconductor industries, namely, energy dispersive X-ray analyzers, X-ray fluorescence analyzers, carbon analyzers, carbon/sulfur analyzers oxygen/nitrogen/hydrogen analyzers, particle size distribution analyzers, gas pycnometers, reticle/mask particle detection systems, wafer flatness analyzers, liquid particle counter, ultra-pure water monitors, trace gas monitors, semiconductor impurity analyzers, mass flow controllers, vaporized liquid source control systems, optical crystals, scintillation crystals, X-ray detectors, pyroelectric infrared detectors, thermopile detectors, intelligent tachometers; apparatus and instruments for food industry, agriculture, forestry and fisheries, namely, salinity meters, calcium hardness meters, dissolved oxygen checkers, plant photosynthesis analyzers; living environment and pollution monitoring and analyzing apparatus and instruments; apparatus and instruments for vehicle engines, namely, automotive emission analysis systems, volume samplers, automotive emission analyzers, infrared gas analyzers, air-fuel ratio analyzers, vehicle emission test systems, emission test processors, engine performance test systems, DC chassis dynamo-meters, sealed housing for evaporative determination, gas purifiers and gas dividers