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• Business: Electronics and Electrical: Instrumentation: Flow Detection and Analysis  (51)
• Business: Industrial Goods and Services: Machinery and Tools: Vehicle Repair and Maintenance  (180)
• Science: Environment: Air Quality: Products and Services  (184)
• Science: Environment: Air Quality: Products and Services: Equipment and Supplies  (155)
• Science: Environment: Environmental Monitoring: Products for Sampling and Monitoring: Air  (81)

• Acme Engineering Products - Manufactures gas detection systems for building ventilation control, also automatic strainers for intake, process and effluent filtration, and electric boilers, steam superheaters and other process heating equipment.
• Advanced Instruments Inc. - Designer and manufacturer of oxygen analyzers and sensors for percent, PPM, and PPB measurement. Manufacturer of replacement parts for Teledyne analyzers and sensors including the A-2C, B-2C, and L-2 oxygen sensors.
• AFC International, Inc. - Provider of gas detectors and air quality instrumentation for the detection of toxic, hazardous, combustible gases and vapors for safety and health applications.
• Airspace Inc. - Developer and manufacturer of personal gas monitors to detect carbon monoxide (CO) and methane (CH4).
• All Safe Industries, Inc. - Supplier of gas detection instruments, gas masks and many other types of safety supplies.
• Alpha Omega Instruments - Manufactures oxygen and carbon dioxide analyzers for safety and for combustion optimization and control in industries like steel production, and chemical processing.
• American Gas And Chemical Co. - Manufacturer of leak detection products, ultrasonic testers, gas monitors, indicators and instrumentation, safety equipment.
• Analytical Technology, Inc. - Manufacturers of sensors for toxic gas emissions.
• Applied Ozone Systems - Sells portable air ozone sensors and monitors for locating equipment leaks or monitoring ambient air quality for safety in the workplace.
• App-Tek International - Manufacturers of gas detection and environmental monitoring instrumentation.
• App-Tek Safety Pty Ltd - Supplier of gas detection and other air monitoring equipment.
• Armstrong Monitoring Corporation - Providers of systems for the detection and monitoring of toxic, combustible, explosive, corrosive gases or vapours, also levels and leaks of water, petroleum, hydrocarbons and other liquids, vapour and materials.
• Baseline-Mocon - Manufacturer of air quality testing equipment, gas detection equipment, and other gas monitoring and analysis hardware.
• Bionics Instrument - Gas detectors and detection systems for toxic, corrosive, and flammable gases. Alarm systems, gas warning systems, and software for data acquisition and monitoring.
• BMT Messtechnik - Sells low and high concentration ozone UV photometers and air cooled generators.
• Boreal Laser Inc - Manufacturer of portable and fixed open-path infra-red based toxic gas detection equipment.
• BPA - Suppliers of several brands and models of portable, personal, and fixed gas detection equipment for monitoring and confined space entry.
• Breathe E-Z Systems, Inc. - Manufacturer of non-invasive gas detectors including hydrogen breath monitors, carbon-monoxide testers and ethylene oxide (ETO) measuring devices.
• BW Technologies Ltd. - Manufactures and markets full line of gas monitoring equipment providing early warning of poisonous gases such as VOCs (PID), H2S, CO, O2, SO2, PH3, NH3,NO2, HCN, Cl2, ClO2, O3, and combustibles.
• Cascade Technologies - Quantum-cascade-laser gas detectors and sensors using high resolution infrared spectroscopy lasers.
• CEA Instruments, Inc - Manufacturer of devices for monitoring over 200 different toxic gases, combustible gases and oxygen levels as pocket-size, portable, or wall mounted systems in single and multichannel configurations.
• Certified Air Safety - Offers gas detection products, calibration services, and monitoring.
• CES-LANDTEC - Provider of tools for Landfill Gas (LFG) extraction systems including gas measuring instruments, wellheads, piping, and data collection and management software and services.
• Chang Young E&E Co., Ltd - Small, fountainpen sized portable gas leak detector able to detect LNG and LPG.
• City Technology - Providers of gas sensing technology for the automotive industry, medical applications, gas emissions, industrial and domestic safety.
• Classic Filters - Manufacturer of particulate and coalecsing filters for environment monitoring applications.
• Cogniscent Inc. - Develops, manufactures and markets low-cost, high-performance odor detection devices that are capable of detecting a broad range of odors at parts per million and better.
• Comag IR Technology, Inc. - Manufactures and sells gas detectors that use infrared technology to electronically monitor gases in the home or workplace.
• Corus Gas Detection - Provider of a range of gas detection services and equipment.
• Critical Environment Technologies - Manufacturer of gas detection monitors and systems for commercial, institutional, and industrial applications.
• Crowcon Detection Instruments - Manufacturer and seller of a range of gas detection products - personal, portable and fixed monitors for toxic and flammable gases.
• CTS - Gas detectors, portable and fixed air monitoring systems.
• Delphian Corporation - Manufacturer of gas monitors, monitoring systems and instrumentation for toxic and combustible gases including carbon monoxide, hydrogen sulfide, hydrogen, oxygen deficiency, methane and natural gas.
• Detector Electronics Corporation. - Optical flame and gas detection solutions meeting world standards in performance and reliability.
• Draeger Safety, Inc. - Offers portable gas detector systems (short and long-term measurements), both for area and personal monitoring and fixed gas detection systems for the detection of explosives and toxic gases.
• Dynament Ltd - Manufacturers of infrared gas sensors, designed for the detection of hydrocarbon and carbon dioxide gases
• Eco Sensors, Inc. - Manufactures ozone and VOC gas sensors, detectors, monitors and controllers for workplace safety, process control, ozone generator control, air and water purification, and deodorization.
• Entech Supply - Wholesale carbon monoxide analyzers, combustion analyzers and combustible gas detectors.
• Enviromax Gas Analyzers by Liston Scientific - Manufacturer of IR analyzers for CO, CO2, SO2, CH4, and other gases. Also manufactures chemiluminescent NOx, total hydrocarbon by FID analyzers, and custom systems in both rack and NEMA enclosures.
• Environmental & Gas Monitoring Ltd. - A privately owned company specialising in Gas Detection Products for Personal Protection, Remote Sampling, and Fixed Applications.
• Environmental Supply Houston, Inc - Rental, repair, and sales of gas monitoring equipment. OSHA training and fit testing.
• E2V Technologies (UK) Ltd. - Manufacturer of electrochemical, infrared and pellistor gas sensors.
• Figaro Corporation - Producer of semiconductor (MOS) and electrochemical sensors for detection of toxic gases, methane, propane, CO, CO2, alcohol, VOC and combustible gases.
• Foxcroft Equipment and Service Company - Manufacturer of chlorine analyzers, chlorine detectors, related chlorine control equipment, chart recorders, telephone dialers and gas detectors.
• Frontline Safety - Safety equipment suppliers,offering a range of products from gas detection equipment to breathing apparatus.
• Gas Data Limited - Designs and manufactures equipment for landfill monitoring, gas analysis, personal CO2 safety monitors and air quality meters.
• Gas Detection Equipment – Bomark Instruments - Suppliers of industrial, fixed and portable gas detection equipment for hundreds of gases.
• Gas Detector Service - Repair and rental services are provided on a variety of combustible, oxygen and toxic gas detectors.
• GasOptics - Offers leak detection and vizualization for the petroleum and petrochemical industry.
• Gastec Corporation - Supplier of gas detector tube systems and analyzers.
• Gastech Australia Pty. Ltd. - Manufactures and distributes gas and flame detectors, including portable instruments, fixed sensors and controllers for all environments.
• GDS Corp. - Gas and flame monitoring devices for industrial use.
• GDS Technologies UK - Manufacturer of methane, propane, butane detectors, catalytic pellistors, electrochemical cells, infra red/semiconductor gas detection sensors.
• General Monitors - Manufacturer of gas detectors for combustible gas and toxic gas applications, as well as flame detection instrumentation.
• Geotechnical Instruments (UK) Ltd - Manufacturers of intrinsically safe handheld/portable infrared gas analyzers and monitors used in civil engineering, medical, military, landfill, remediation and controlled atmosphere environments.
• GFG Instrumentation, Inc - Portable and fixed gas monitoring systems and respiratory air monitoring.
• Groveley Group - Manufacturer of fire and gas detection field equipment and associated accessories.
• Hazardous Gas Detectors Inc. - Manufacturer of remote hazardous gas detectors for industrial and telecom applications.
• Honeywell Analytics - Manufacturer of toxic and flammable gas detection systems under the Lumidor, MDA Scientific, Sieger and Zareba brands
• Horiba Instruments, Inc. - Supplier of CEMS, ambient, and process gas instrumentation worldwide.
• Husaini Engineers - Manufacturer of toxic gas leak detectors and analysers for chlorine, ammonia and combustible gases.
• Industrial Scientific Corporation - Manufacturer of fixed and portable gas detecting and monitoring equipment.
• Infitron, Inc - A Korean company that manufactures portable and stationary gas monitoring instruments which monitor oxygen deficiency or enrichment, toxic gas poisoning, and explosive gas.
• Infratec GmbH Sensor Division - Manufacturer of infrared gas detectors and pyroelectric detectors for NDIR gas analysis, flame detection, analytical instruments and radiometry.
• International Sensor Technology - Manufacture combustible and toxic gas monitoring instruments using solid state, infrared, PID, electrochemical cell, and catalytic bead sensor technologies.
• Invest Electronics - Manufacturer of combustible gas detectors, refrigerant leak detectors, and other electronic devices.
• Invest Electronics Ltd. - Developer and producer of gas detection systems for measurement and control of toxic and combustible gases using stationary and portable systems.
• iTX Gas Monitor - The iTX Multi-Gas Monitor from Industrial Scientific monitors from one to six gases, including toxic, combustibles and oxygen, providing real-time readings, datalogging, data input options and interchangeable sensors.
• JJS Technical Services - Provider of portable and fixed gas monitors and gas detection equipment.
• Kebaili Corporation - Manufacturer of miniature hydrogen gas sensors and electronic instrumentation based on MEMS micromachined silicon and nanotechnology.
• Kitagawa America - Gas detector tubes for a wide range of toxic gases.
• KT Sensor - Gas sensors and infrared gas detectors with high resolution for ethylene, acetylene, carbonmonoxide, HC gases and CO2.
• Mast Development - Manufacturer and distributor of ozone monitoring and environmental testing equipment for occupational safety, atmospheric monitoring, and automotive and rubber industries.
• MeterMall - Seller of meters and test equipment to measure and monitor the air environment: weather instruments, thermometers, data loggers, anemometers, hygrometers,and gas detection equipment.
• Methanometer Information - Site dedicated to methanometers and portable gas detectors used primarily in the underground coal mining industry.
• Mil-Ram Technology , Inc. - Provider of wireless, toxic and combustible gas detectors, detection systems, monitors, electrochemical sensors, environmental protection and process control instrumentation.
• Mine Safety Appliances Company - Manufacturer and supplier of fire and gas detection systems for general, chemical and petrochemical industries.
• MST Technology - Industrial gas detection equipment manufacturer, product sales, service and hazardous gas installation consulting, including network life-safety engineering and integration. Toxic, corrosive, acid, flammable, and combustible gas monitoring specialists.
• NanoSense - Manufacturer of devices for gas analysis and for detection of carbon monoxide, carbon dioxide and radioactivity.
• Neodym Technologies - Supplier of gas detection products for industrial, commercial, domestic and OEM applications - fixed DC-powered detectors, monitors and sensors for hydrogen, methane, propane, freons, and refrigerant gases.
• Net Safety Monitoring - Designs and manufactures gas and fire monitoring equipment for a wide range of hazardous industrial applications.
• New Cosmos Electric Co. Ltd - Portable gas detectors, alarms, and indicators for domestic and industrial use.
• Nextteq LLC - Provider of gas detector tubes, pumps, kits and accessories for analyzing pollutants in the air, ground and water. Serving the petrochemical/chemical industries.
• Nova Analytical Systems Inc. - Manufacturer of continuous and portable gas analysis equipment for flue gas, on-line process, special purpose, heat treating, steelmaking, power industry, engine exhaust and air quality applications.
• Nova Systems, Ltd. - Design, development, and manufacturing of gas monitoring and gas detection instruments.
• Ntron Europe Ltd - Gas analysis and gas handling technologies: process oxygen and gas detection, refrigerant analysis, and breathing apparatus, products and services.
• OdaLog Portable Gas Monitors - Gas monitors for detecting and logging hydrogen sulphide (H2S) gas as an aid to odor control in the wastewater industry.
• Oliver IGD UK - Company specializing in the manufacture of gas detection instruments.
• Omnitron - Manufacturer of detectros for LPG, natural Gas, HCFC and CO.
• OX-AN Environmental Gas Monitoring - Provider of gas detection and monitoring systems, covering carbon dioxide, oxygen and landfill brownfield site gases.
• OzoneMeters - Supplier of ozone-related sensing equipment: portable and wall-mount ozone detectors and ozone analyzers.
• Panthergas Direct Ltd - Provider of gas safety inspections and gas detection meters, including carbon dioxide monitoring and site surveys.
• Parallax Energy Systems Ltd. - Developer and manufacturer of remote ambient air monitoring systems. "The Reactor" is capable of measuring H2S, SO2, LEL, benzene, and wind speed and direction. All sensors data logged as per ambient air guidelines. Rentals, leasing, purchasing options available.
• PAS Technology - Photoacoustic-based gas monitors for the OEM market. Monitors greenhouse gases like SF6, N2O, CO, CO2, CH4 and solvents.
• Paterson Instruments Ltd. - Manufacturer and seller of industrial and commercial gas and vapor detection instruments for chemical, pharmaceutical, oil, gas, mining, car parks, and shipping applications.
• Pollution Protection Systems Mumbai Pvt Ltd - Manufacturers and exporters of gas monitoring systems, fire protection equipment.
• ppm Messtechnik - Manufacturer and distributer of gas analysis instruments and monitors with opto-acoustical detectors for emission monitoring, process control and workplace monitoring (TRGS402 / OSHA exposure limits). Offers service for MAC 2000, MAC 2040 und MAC 2050 units from DIEHL and WS+S.
• Protector (Offshore) Safety Ltd - Provider of services and manpower (H2S safety technicians) for offshore and onshore hazardous area environments, including vessel entry, confined space and drilling rig applications.
• PureAire Monitoring Systems - Provider of continuous toxic gas monitoring systems for use in semiconductor, chemical and petro-chemical, pharmaceutical, pulp and paper, and odor control in waste treatment facilities.
• Quatrosense Environmental Ltd. - QEL - Manufacturer of gas detection equipment and combustion analyzers, for industrial, municipal and commercial applications.
• R. C. Systems Inc. - Manufacturer of products that interface industrial sensors and analyzers to alarm and displays. Applications include ambient gas detection, monitoring of rotating machinery and continuous emissions monitoring.
• Reltek Corporation - Manufactures a line of hazardous gas monitoring and alarm systems including, a variety of intrinsically safe gas sensors, high speed telemetry, Windows based data logging, and accessories.
• Respo Products - Supplies a complete range of fixed and portable gas detectors and monitors, plus other safety equipment.
• Riken Keiki - Gas detection instruments (stationary and portable) for safety in the petrochemical, semiconductor, utility, and shipping industries.
• SenseAir - Infrared maintenance free sensors for safety applications.
• SenseWARE - Supplier of CO2 detection equipment for areas where carbon dioxide cylinders are stored. Detailed information regarding CO2 hazards.
• Sensidyne: Gas Detection Systems - Manufactures and distributes gas detection systems and air sampling products.
• Sierra Monitor Corporation - Hazardous gas detection systems for combustibles, oxygen deficiency and toxic gases with digital link to central control system for plant-wide monitoring.
• Specpoint Systems Development, Inc - Manufactures newly designed ammonia detector replacement parts for Honeywell UVH series ammonia detectors.
• Spectros Instruments - Manufacturer of both fully integrated and stand alone gas spectrometers for use as fumigation, sterilization or semiconductor gas monitors.
• S&S Northern - Gas detection equipment, gas pressure proving, and gas safety shut-off systems for schools, colleges, local and health authorities for laboratory and kitchen safety.
• Sylglas Waterproofing Products - Seller of carbon monoxide detectors that can be applied to most surfaces with a self-adhesive backing for easy fitting.
• Systech Instruments - Gas analysers and detectors for a range of gases, listed by products and application. Regular news and exhibition details.
• Technisol Ltd. - Designs and manufactures gas detectors for the leisure industry and small commercial sector of the marine industry.
• Telaire - Manufacturer of infrared gas sensors and instruments for carbon dioxide monitoring and ventillation control applications.
• Thermal Gas Systems Inc. - Source of Haloguard refrigerant monitors and a line of leak monitoring instruments using electronic technologies.
• TQ Environmental plc - Manufacturer of gas detection instruments for a variety of applications,including marine transport.
• Tunnel Sensors Ltd. - Designers and manufacturers of tunnel atmosphere monitor systems. Installation and maintenance provided worldwide.
• United Safety - Assessment, supervision, detection and protection services, H2S safety equipment rentals, and H2S hazardous environment protection services.
• VTI-Valtronics - Manufacturer of non-dispersive infrared NDIR gas monitors with gas sensors for CO2, CO, CH4 and NH3.
• Young Environmental Systems - Manufacturer of indoor air quality instrumentation.

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