Earth's atmosphere is a layer of gases surrounding the planet Earth and retained by the Earth's gravity. It contains roughly 78% nitrogen and 21% oxygen, trace amounts of other gases, and water vapor. This mixture of gases is commonly known as air. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation and reducing temperature extremes between day and night.
The atmosphere has no abrupt cut-off. It slowly becomes thinner and fades away into space. There is no definite boundary between the atmosphere and outer space. Three-quarters of the atmosphere's mass is within 11 km of the planetary surface. In the United States, persons who travel above an altitude of 50.0 miles (80.5 km) are designated as astronauts. An altitude of 120 km (75 mi or 400,000 ft) marks the boundary where atmospheric effects become noticeable during re-entry. The Karman line, at 100 km (62 mi), is also frequently used as the boundary between atmosphere and space.
Air Quality :: Environment
Products and Services :: Indoor Air Quality
Products and Services :: Air Quality
Science Instruments and Science Supplies

A. P. Buck Inc. - Air sampling equipment for industrial hygiene, safety, environmental and occupational health.
Meta Description: [ A.P. BUCK INC. manufactures environmental air sampling equipment. A tradition of innovation in samplers for industrial hygienist, safety and mold remediation. ]
ActiveSET.org - Paid advertising directory for air-quality products and services including stack testing with useful links to related information.
Meta Description: [ Largest reference site for source emissions testing, services and products on the Internet. Packed with valuable links, illustrations, reference & more. ]
ADC Gas Analysis Ltd. - Supply and manufacture infrared gas analysis equipment for use in: laboratory, emissions control, industrial process control. Full spares and service support.
AES Laboratoire - Air sampler to monitor microbial airborne contamination with full traceability and CFR 21 part 11 compatibility.
Air Instruments and Measurements - Developer of gas analyzers and complete systems for environmental monitoring, ambient air, vehicle exhaust and stack gas emissions.
Meta Description: [ Air Instruments And Measurements develops proprietary World Class gas analyzers and complete systems for environmental monitoring, ambient air, vehicle exhaust and stack gas emissions ]
Air Logics, Llc. - Real-time perimeter monitors of volatile and particulate airborne substances with integrated data management and reporting.
Meta Description: [ SJI is an energy services holding company for South Jersey Gas, South Jersey Energy, South Jersey Energy Service Plus and Marina Energy. ]
Airmetrics - Provides solutions to ambient air monitoring problems through the manufacturing and support of the MiniVol Portable Air Sampler.
Meta Description: [ Airmetrics is dedicated to providing practical and innovative solutions to ambient air monitoring problems through the manufacturing and support of the MiniVol Portable Air Sampler. ]
American Ecotech - Supplier of ambient air samplers used for indoor and outdoor research and monitoring purposes. Continuous pollutant and gas analyzers and calibrators for SO2, NOx, CO, CO2, H2S, O3 and particulate monitoring air samplers.
Analytical Systems International - Manufacturer of analyzers, sensors and monitors for air quality, petrochemical gas processing, and environmental industries including hydrocarbon, VOC and total sulfur.
Meta Description: [ Manufacturing Liquid and Gas Analyzers, Analyzer Accessories and Services ]
Apex Instruments, Inc. - Seller of equipment for sampling emissions from industrial chimneys and smoke stacks using the US-EPA guidelines. Customize equipment for isokinetic, gas and particulate sampling.
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Applied Physics USA - Supplier of cascade impactors and air samplers.
Meta Description: [ Metrology and scientific equipment and supplies. Cascade Impactor, KLA-Tencor SP1 and SP2 Wafer Inspection Systems need Nano Particle Technology ]
Aquaria s.r.l. - Products and accessories for sampling and analysis requirements in air quality, emission monitoring and working area control fields.
Ashutosh Overseas Enterprises - Distributors/importers of oxygen and other gas analytical instruments and oxygen sensors including PPM (trace) and percentage oxygen sensors.
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Auburn Systems - Environmental Division - Airborne dust (particulate) monitoring systems utilizing triboelectric technologies.
Bitt Technology - Manufacturer of systems for measurement of airborne environmental radiation. Offers planning, construction, maintenance and training for these systems
BPA Air Quality Solutions - Suppliers of laser particle counters, mold testing kits, hygrometers, temperature sensors and multi-gas monitors with ratings and reviews of several different models.
Meta Description: [ Indoor Air Pollution Monitoring and Testing Equipment: We offer big savings on air monitoring equipment and indoor air quality testing equipment. ]
Brunswick Instrumentation - Consultants on quality of instrumentation used for measuring emissions from process plants, oil refineries, and power stations. Europe and North America.
Meta Description: [ Specialists in process instrumentation, especially gas analysers used for process control, emissions monitoring for the power, chemical and refining industries ]
California Analytical Instruments, Inc. - Provide ambient monitoring and sensing equipment, and gas analyzers for industrial and automotive emissions measurement, environmental source emission measurements and production efficiency controls.
Meta Description: [ California Analytical Instruments, Inc. features emission monitoring services and products. NO NOX CO2 Oxygen NO2 Gas, CO Process Control Analyzer ]
California Measurements, Inc. - Air particle and particulate sampling instruments for research and contamination control.
Meta Description: [ California Measurements, Inc. - Air Particle Analyzers and Samplers ]
Cascade Technologies - Developer and manufacturer of quantum cascade lasers for gas sensing and other applications. Real time measurement, parts per trillion, room temperature operation.
Meta Description: [ Mid IR Quantum Cascade Laser high sensitivity gas measurement and identification for emission monitoring and homeland security ]
CBISS Stack Gas Monitor Systems - Supplier of turnkey stack gas monitor solutions for gas analysis and flow detection including gas turbine and cogeneration systems.
Cerex Environmental Services, Inc. - Provider of instruments and field support for air monitoring. Systems can detect air pollutants such as benzene, mercury, sulfur dioxide, ammonia and chemical agents on a real time basis.
Meta Description: [ Network Solutions - Original domain name registration and reservation services with variety of internet-related business offerings. Quick, dependable and reliable. ]
Clean Air Instrument Rental - Provider of rental equipment for air monitoring and sampling.
CleanAir Express - Air pollution measurement equipment and supplies. Equipment is engineered for reliability and ease of use.
Meta Description: [ Providing environmental (air quality) consulting, source testing services, emissions measurement, instrument rental and sales. Located in Palatine, IL. CleanAir Express provides sampling equipment and supplies for professionals that take pride in their air test programs. Our goals are to have t... ]
Custom Instrumentation Services Corporation - Designer and builder of continuous emission monitoring systems (CEMS) for stationary point facilities.
Meta Description: [ We provides continuous emissions monitoring systems (CEMS), Data Acquisition and Reporting Systems (DARS), and other environmental hardware, software and support services. ]
Dekati Ltd - Manufacturer of impactor aerosol samplers for atmospheric and pharmaceutical applications.
DKK-TOA Europe - Suppliers of on-line process analyzers, sampling systems and turn-key systems packages, including: analyzers for water treatment and sewage plants, ambient air pollution monitoring (EPA approved), environmental monitoring, analyzers for oil-refineries and petrochemical plants.
Meta Description: [ Analytical Instrumentation ]
DR DAS - Provider of air quality, emissions and meteorological data acquisition and management software and equipment.
Meta Description: [ DR DAS provides data acquisition and SCADA hardware, software and services in support of energy and environmental (air quality, meteorology, hydrology,emissions, and process) monitoring. Systems use Microsoft Windows products for open architectures. XML, HTML, Active X, Visual Basic and .Net pro... ]
Eagle Technologies Ltd. - Designer, manufacturer and operator of air quality monitoring systems designed for use in the oil and gas industry to monitor gas emissions.
Meta Description: [ Eagle Technologies Ltd. designs, manufactures and operates state of the art air quality monitoring
systems. These systems were designed for use in the oil and gas industry to monitor gas emissions from drilling, completions and
work-over sites when sour (H2S) gas may be present. ]
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Eco Physics - Products for measuring nitrogen oxides by the chemiluminescence technique.
EcoChem Analytics - Seller of instrumentation and systems for measuring mercury, CO, CO2, HCl, SO2, H2O, PAH. Applications are described and technical citations are provided.
Meta Description: [ EcoChem Analytics is a manufacturer of state-of-the-art Anaytical Instrumentation and Continuous Emissions Monitoring Systems (CEMS) for criteria pollutants, Mercury, PAH (Polycyclic Aromatic Hydrocarbons) and particles. ]
Entech Instruments - Manufacturer of canister-based air sampling and analysis equipment for VOCs for industrial hygiene, indoor air, health and environmental markets.
Meta Description: [ Manufacturer of canister-based air sampling and analysis equipment for VOCs for industrial hygiene, indoor air, health and environmental markets. ]
Envco The Environmental Collective - An association of cooperating professionals and companies, product list includes air sampling and air quality instruments.
Meta Description: [ The Environmental Collective - Providing professionals with quality accurate repeatable information through service and equipment. ]
Enviro Technology Services plc - Environmental monitoring instrumentation for gases, particulates and meteorological parameters. Offers environmental instrument rental, environmental software, systems operation, service and maintenance.
Meta Description: [ World leading suppliers of Air Quality, Emission and Environmental Monitoring Analysers, Systems, Software and Networks. ]
Environmental Mechanics, Inc. - Equipment sales and service facility for air and water sampling equipment. Battery pack rebuilding.
Environmental Monitor Service, Inc. - Seller of opacity monitors, compliant opacity systems, non-compliant opacity monitors, opacity DAS, opacity audit filters.
Meta Description: [ Opacity monitor ]
Environmental Monitoring Company, Inc. (EMC) - Manufacturer of PC-based data acquisition systems for ambient air quality, continuous emission monitoring, and meteorological monitoring.
Meta Description: [ A quality provider of air monitoring services & data acquisition software. ]
Environmental Systems Corporation - Designs, integrates and maintains stack emissions and ambient air quality monitors and data acquisition systems.
Environnement S.A - Global supplier specializing in the design, manufacture, and supply of gas and particulate ambient-air and stack emission instrumentation, and water monitoring equipment and systems.
ET Marine - Emissions monitoring equipment for the maritime industry. Supply, installation, training and after-sales support of a range of emissions monitoring equipment and systems for emissions from shipping.
Meta Description: [ ET Marine: supply, installation, training and after-sales support of a range of rugged, reliable and advanced emissions monitoring equipment and systems for the maritime industry, emissions from shipping ]
FilterSense - Particulate emission monitoring and dust collector automation solutions for process control, maintenance reduction and EPA MACT compliance.
GrayWolf Sensing Solutions - Supplier of software for Microsoft Pocket PCs and laptop computers to monitor indoor air quality, air speed and toxic gases when used with instruments from other manufacturers.
Meta Description: [ GRAYWOLF: Indoor Air Quality Monitor, Toxic Gas Meter, TVOCs, Pressure, Air Velocity, IAQ, Carbon Dioxide measurement, monitors and much more. ]
Horiba Instruments, Inc. - Manufacturer and supplier of CEMS, ambient, and process gas instrumentation.
Meta Description: [ Over the past 50 years, HORIBA’s state-of-the-art technologies have been used to develop and deliver quality products that help preserve the air and water that is essential to our survival. HORIBA’s advanced analyzer technologies provide accurate, low maintenance emission measurements an... ]
IN USA, Inc. - Ozone analyzers, monitors, and controllers for gas-phase or liquid-phase process ozone, ozone safety (TLV), ozone leak detection, ozone generators, and ozone monitoring and delivery systems.
Meta Description: [ UV-based ozone analyzers and Methyl Iodide analyzers for Ozone gas and liquid phase measurement. Ozone detector instruments, ozone generators and ozone control instrumentation., IN USA offers complete lines of UV-based ozone analyzers and Methyl Iodide analysers for gas and liquid phase measureme... ]
J.U.M. Engineering - Manufacturer of heated FID analyzers for the measurement of hydrocarbons and non-methane hydrocarbons, and oil in water monitors, aerosol-can leak detectors.
Meta Description: [ We specialize in THC analyzers, NMHC analyzers, stack emissions analyzers, sample handling instruments and Aerosol can Leak Detectors. ]
JS Holdings - Suppliers of environmental monitoring instrumentation, asbestos sampling devices, and humidity meters.
K2BW Environmental Equipment - Manufacturer of Continuous Emissions Monitoring Systems (CEMS) for air emissions, gas sampling system components, and atmospheric corrosion test systems. Service, maintenance, rentals, and buy/sell used instruments.
Meta Description: [ Continuous Emission Monitoring System (CEMS) design and manufacturing. Custom process and emission monitoring systems, advanced, microprocessor based gas analyzers and gas sampling systems. Guaranteed compliance certification. ]
Lowe Engineering - Provider of continuous emission monitoring systems, gas analysers and gas detection systems.
Meta Description: [ Lowe Engineering Ltd - Steam & Water Analysis Sampling, Continuous Emissions Monitoring, Software, CEMData, Control & Instrumentation Panels, Specialist Fabrications, Lighthouse Doors, Envirosoft, ABB, Durag, Sentry, CEMplus, CEMsuite, CEMS Software ]
Madur Electronics - Producer of flue gas analyzers and NDIR infrared sensors for diffusion and flow measurement of carbon dioxide and methane for indoor climate control and biogas applications.
Meta Description: [ Madur is a leading manufacturer of flue gas analyzers, landfill analyzers and infrared sensors for industrial and OEM applications. ]
Markes International Ltd - Manufacturer of analytical instrumentation for measurement of trace-level volatile and semi-volatile organic chemicals (VOCs and SVOCs) in samples.
Meta Description: [ Markes International Limited is a specialist manufacturer of analytical instrumentation with products designed to automate and enhance the measurement of trace level volatile and semivolatile organic chemicals in real-world samples. ]
McKinney Measurement - Gas-measurement equipment for oil field applications - individualized kits for meter tubes, orifice plates, leveling saddles, Barton meters.
Meta Description: [ Gas Measurement Meter tubes,Hook-up Kits,orifice plates,Barton Meters,Saddles,Meter tubes,Neodyne Switches,CEMCO MAJOR / WELLMARK LIQUID LEVEL CONTROLLERS;Fast,friendly,serviceW/25YRS EXPERIENCE.Answers/inventory FOR gas measurement/P.D.meters,TEST EQUIPMENT,VALVES.. ]
Met One Inc. - Manufacturer of particulate (indoor outdoor) monitors, dataloggers,and systems for air quality monitoring.
Meta Description: [ , Met One offers Meteorological, Environmental, Particulate and Hydro-met monitoring Instruments, Systems and Solutions. ]
Mission Instruments - Markets Cegrit Flyash Sampler that extracts an ash sample from chimney ducts for laboratory analysis. Used on pulverized-coal-fired boilers.
Monitor Labs - Supplier of opacity monitors, flow and particulate monitors, air quality monitors for CO, CO2, NOx, SO2, ozone, continuous-emissions monitoring, data acquisition systems and system support.
Monitoring Solutions Inc. - Continuous emissions monitoring systems (CEMS) and services including: CEMS, opacity, oxygen analyzers, data acquisition systems (DAS), and stack services from maintenance to audits and RATA's.
Meta Description: [ Monitoring Solutions is your complete source for process and emissions monitoring. We provide engineered solutions for process and environmental monitoring and reporting. air pollution monitoring equipment, cem system, oxygen monitoring. ]
MSI CEMS Systems - Manufacturer of continuous emission monitoring systems, for industries including utilities, pulp and paper, incinerators, and petrochemicals.
MSP Corporation - Air sampling instruments and impactors.
Meta Description: [ Products and services to the semiconductor, pharmaceutial and air pollution control industries ]
Oldham - Manufacturer of gas and dust emission monitors.
Omega Specialty Instrument Co. - Manufacturer and distributor of air sampling filters and related equipment for industrial hygiene, safety, environmental and indoor air quality applications.
Meta Description: [ Omega Specialty manufactures air sampling media and equipment with a committment to technical excellence and uncompromising quality. ]
PACE Environmental Products, Inc. - Continious emissions monitoring design, building, testing, and repair.
Meta Description: [ PACE designs and builds Continuous Emission Monitor Systems (CEMS), Data Acquisition and Control Systems (DACS), provides analyzer rental, repair and field service. ]
Pacwill Environmental - Supplier of equipment for environmental testing needs including: source and ambient sampling, continuous emissions monitoring, cascade impactors, and air quality monitoring systems.
PCME Particulate Monitoring Technologies (UK) - Provider of particle and continuous-emissions monitoring technologies. TuV and MCERTS instrumentation and products.
Phoenix Instruments - Manufacturer of LED opacity monitors, CEMS for SO2, NOX, CO, and CO2, for environmental monitoring of smoke stack emissions. Monitors are EPA certified.
PIXE International Corporation - Manufactures air-particulate samplers - continuous time-sequenced PM2.5 + PM10 Streakers and cascade impactors suitable for PIXE, XRF, SEM, and other elemental analysis techniques.
Meta Description: [ PIXE International manufactures and sells precision air particulate samplers. Products include time-sequenced air-particulate samplers and area impactors. ]
RADeCO, Inc. - Manufacturer of air sampling equipment for industrial, medical, nuclear and laboratory uses. Featuring grab samplers and constant flow air samplers, calibration and emergency response equipment. Silver zeolite and TEDA treated radioiodine sampling cartridges as well as particulate filter paper.
Meta Description: [ For over 30 years, RADeCO has been the industry standard for air sampling products. We make air flow samplers (continous duty and grab samplers), remote monitoring systems, radioiodine cartridges, air flow calibrators,particulate filters, and other products for your air sampling needs. The compan... ]
Raymetrics S.A. - Designs and manufactures products for meteorological and environmental applications and air pollution monitoring, based on advanced Lidar techniques.
Meta Description: [ Raymetrics designs and manufactures state of the art Lidar systems for environmental, meteorological and air pollution applications. ]
Rosemount Analytical - Process Gas Division - Supplier of CEM systems, process gas, process liquid and laboratory analyzers and systems for environmental analysis, efficiency, and process evaluation.
Sartec - Environmental monitoring and analysis for water, petrochemical, pharmaceutical and lab services markets.
Meta Description: [ TOC Analysers, MCTS and Elemental Analysers, Gas Generators for Laboratory and Industrial applications. ]
SASSCO - Supplier of Tedlar, black tedlar, and Teflon gas sample bags.
ScanTronic of Denmark - Producer of electronic equipment for combustion optimizing. Products include: opacity-based dust instrumentation, oxygen meters, zirconia cells, trim control systems, and flue-gas analysers.
Signal Group Limited - Manufacturers of gas analysers, accessories and systems for air quality ,monitoring, continuous emissions monitoring, RD (combustion and other), automotive emissions, and process gas monitoring.
Meta Description: [ Signal Group description ]
SKC Gulf Coast Inc. - Distributor air sampling equipment for the industrial hygiene, safety, environmental and occupational health markets including sample pumps, constant flow samplers, calibrators, gas sample bags, and VOC-sampling canisters.
Meta Description: [ SKC Gulf Coast provides professional quality solutions for all your air sampling, indoor air quality, gas detection, VOC, and industrial hygiene instrumentation needs. ]
SKC Inc. - Manufacturer of air sampling equipment for the industrial hygiene, safety, environmental and occupational health markets. Sample pumps, constant flow samplers, calibrators, gas sample bags, and VOC-sampling canisters.
Meta Description: [ SKC Inc. the world leader in sampling technologies provides professional indoor air quality sampling equipment for all your IAQ, industrial hygiene and environmental sampling needs. ]
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Thermo Andersen Instruments - Manufacturer of source and ambient particulate samplers, industry standard particle sizing impactors, EPA reference method PM2.5 and PM10 monitors and continuous mass monitors.
Thomson Environmental Systems - Offers environmental monitoring equipment for primarily air, ambient, stack and process dust, throughout Australia.
Meta Description: [ Thomson Environmental Systems is a 100% Australian owned company, specialising in the design,
supply, installation, commissioning and support of Air Quality monitoring equipment, to the Australian, New Zealand and International market. ]
Title40 Data Systems - Reseller and integrator of environmental data acquisition and monitoring systems including data loggers and central data management systems for air emissions monitoring.
Meta Description: [ buy book real estate title search page property 9 ix ]
Trace Analytical - Manufactures gas analyzers, sampling accessories and integrated analytical monitoring systems for H2, CO, ethylene and ethylene oxide for laboratory and industrial process applications.
Tutorial: Use of flue gas analysers for stack monitoring - How modern, electronic flue gas analysers are used for measurement of pollutants and adjustment of burner systems.
Meta Description: [ Stack gas monitoring using a flue gas analyser for carbon monoxide and other toxic gases to carry out optimisation and EPA compliance testing ]
Unisearch-Associates - Manufacturer of systems for continuous industrial monitoring of gas emissions and air quality.
Meta Description: [ Unisearch Associates offers LasIR, FTIR, TDLAS, UV- DOAS and
chemiluminescence systems based on optical spectroscopy for continuous industrial
monitoring of gas emissions ]
VIG Industries, Inc. - Manufacturer of flame ionization detectors (FID), microprocessor-based hydrocarbon analyzers, zero air generators, NDIR analyzers, custom continuous emissions monitoring (CEM) systems. Repair other manufacturers environmental monitoring equipment.
Meta Description: [ VIG Industries FID, flame ionization detector, THC total hydrocarbon, VOC volatile organic compounds,GC gas chromatography technique, microprocessor controlled gas analyzers ]
WTC Environmental Monitoring and Process Control - Supplier of data acquisition, monitoring and control systems for environmental monitoring and process control. Specialty is turnkey systems for air compliance monitoring.
Meta Description: [ WTC provides a full line of data acquisition, monitoring and control systems for Environmental Monitoring and Process control. ]
Zefon International, Inc. - Manufacturer and distributor of air sampling equipment. Products include air monitoring filters, vacuum pumps, gas detection equipment and indoor air quality equipment.
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