carbon dioxide sensing Articles

  • Effect of chemical oxidation on the gas sensing properties of multi-walled carbon nanotubes

    The effect of chemical oxidation on the gas sensing properties of multi-walled carbon nanotubes (MWNT) is presented in this paper. The MWNT were chemically oxidised in a mixture of concentrated sulphuric and nitric acids. The oxidation time was varied from 4 h to 12 h. X-ray photoelectron spectroscopy was used to study the effect on the chemical composition of the nanotube surface. The results ...


    By Inderscience Publishers

  • Why instrument hire makes occupational safety sense

    Background Decisions concerning the acquisition of occupational safety monitoring instrumentation are often made by operational staff that may not have visibility of the full financial implications of their choices. The following article will examine the factors affecting these decisions and explain why a strategic decision to hire instrumentation can deliver substantial and wide-ranging ...


    By Ashtead Technology Ltd

  • Efficiency’s role in carbon cap-and-trade

    We hear a lot about how efficiency will play an increasingly important role as the United States undertakes efforts to reduce carbon dioxide emissions. But how does that play out in a practical sense under cap-and-trade programs?The Offset Quality Initiative provides insight in a new white paper on greenhouse gas offsets: ...

  • Remote sensing of particulate pollution from space: Have we reached the promised land?

    This paper follows presentation and publication of the Hoff and Christopher 2009 Critical Review and represents an integration of discussants’ views of their paper. The discussants’ comments are organized beginning with a note on the history of satellite sensing, followed with a brief discussion of the strengths and weaknesses of satellite observations relative to air quality management needs. ...

  • Carbon Monoxide: 10 Essential facts

    Carbon monoxide (CO) is an odourless, colourless gas that is found naturally occurring in the atmosphere. It exists at around 0.2 parts per million (ppm) and this is deemed to be a safe level for humans. To give context, oxygen naturally exists at 209,000 ppm. ...


    By Analox Sensor Technology

  • Municipal Solid Waste – Key to a Low Carbon Economy

    A newly released report has found the waste sector has a key role to play in the development of a low carbon economy and the reduction of greenhouse gases (GHGs). This report comes in advance of the UN Climate Conference in Paris, which will take place in December. The report was ...


    By Zero Waste Europe

  • Gas Detection and Monitoring Systems

    In greenhouse applications, the accurate measurement of a number of environmental parameters such as carbon dioxide concentration, temperature, light intensity, water, humidity, pH and nutrient levels using sophisticated sensors is used to create a controlled environment for optimising plant growth rates while minimising energy usage. Carbon dioxide concentration is also one of the best ...


    By Edinburgh Sensors Ltd

  • TDLAS Gas Detection Instrumentation

    PKL Technologies Inc. manufactures tunable diode laser (TDLAS) based gas detectors and monitors. Spectra-1 open path gas sensors are used in a variety of environmental and safety remote sensing applications. Spectra-1 gas sensors have been designed in a compact, easy to use, robust and portable format. Spectra-1 has been developed using proprietary hardware and software, to produce a low cost ...


    By PKL Technologies Inc.

  • Eastern states ready for big EE boost

    Several eastern states will see a large injection of cash for energy efficiency after the nation’s first mandatory auction of carbon dioxide allowances September 25.The auction marks the United States entry into the world of capping and trading carbon dioxide emissions. Ten states are participating in the program, known as the Regional Greenhouse Gas Initiative (RGGI), or more commonly called ...

  • Application of nanocrystalline metal oxide gas sensors for air quality monitoring

    Increasing concern regarding health effects caused by air pollution, together with the limited spatial resolution achievable with conventional monitoring stations, have driven efforts to develop inexpensive metal oxide gas sensors for air quality measurements. The sensing mechanism is dependent on physicochemical reactions between adsorbed gas molecules and oxygen species on the oxide surface, ...


    By Inderscience Publishers

  • CO2 vs. VOC Sensors for IAQ - What`s the Difference

    People sometimes ask about the differences between VOC (Volatile Organic Compounds) sensors and CO2 sensors. While both can be used to measure indoor air quality (IAQ), these sensors are not interchangeable. They measure very different things. CO2 sensing technology by IR (infrared) is stable and is not subject to the short-term, random drift found in air quality sensors. Most IR carbon ...


    By CO2 Meter, Inc.

  • An Application of Tomographic Reconstruction of Atmoshperic CO2 Over a Volcanic Site Based on Open Path IR Laser Measurements

    Abstract—The southern area of Italy is characterized by the presence of many active volcanic areas. In Pozzuoli (Naples, Italy), an urban area characterized by high volcanic risk, a gas emitting site is present. An high percentage of CO2 is emitted, whose atmospheric concentration measurement is an important task in many environmental and scientific applications. In this paper, we describe the ...


    By Boreal Laser Inc.

  • Data assimilation for crop yield and CO2 fixation monitoring in Asia by a photosynthetic sterility model using satellites and meteorological data

    This study assimilates satellite and meteorological data to monitor grain yields and CO2 fixation by developing a photosynthetic-sterility model that integrates the Asian scale of meteorological data such as solar radiation, air temperature effects on photosynthesis and the Normalised Difference Vegetation Index (NDVI) with a Satellite Pour l'Observation de la Terre (SPOT) VEGETATION sensor. ...


    By Inderscience Publishers

  • What is an `IAQ Profile`?

    The 'IAQ Profile' is a visual presentation of indoor air quality. PPM Technology's range of IAQ Monitors enable continuous monitoring of Indoor Air Quality; this precisely describes changes in concentration levels of selected air quality parameters over a period of time.  The IAQ Profile provides the knowledgebase and database for improving indoor air quality efficiently and ...


    By PPM Technology

  • Is your company using Nitrogen or other Cryogenic gases? Why PureAire Recommends an O2 Deficiency Monitor for Safety.

    PureAire Monitoring Systems, Inc. focuses solely on safety in the workplace, and in laboratory environments. Oxygen deficiency monitors are used in areas using Nitrogen, Helium, Argon, and Carbon Dioxide. PureAire strongly recommends an oxygen deficiency monitor to be installed anywhere cryogenic gases are being stored. The purpose of an oxygen monitor is to alert employees in the immediate area ...

  • Green existing buildings is easier (and cheaper) than you think

    Commercial, industrial, institutional, and residential buildings are the most significant users of energy in the United States. Almost 70% of all generated electricity and about 12% of available potable water goes to support use and occupancy of buildings. Buildings play a major role in the quality of life for the 307 million people who go in and out of them every day and have a significant ...

  • Nature inspires a better way to block biofilms

    In many industries where equipment comes in contact with water, including those that rely on water treatment membranes, equipment fouling is a huge problem. Biofilm fouling occurs when living organisms — including bacteria, algae, and even mollusks — become attached to boat hulls, harbor structures, and other equipment. The resulting damage can be costly. Coatings and other chemical ...


    By Fluence Corporation

  • Puzzle remains over source of Amazonian methane

    Remote sensing observations have shown high methane concentrations in the troposphere above tropical forests in Venezuela and Brazil and scientists claim to have measured significant amounts of methane being emitted aerobically from the leaves of plants during photosynthesis. Recent experiments have been unable to reproduce these controversial results. Detailed knowledge of the global atmospheric ...

  • From “Light Green” to Sustainable Buildings

    As more people move to urban areas in search of economic opportunities, the number of buildings that are needed to house them continues to rise. It is estimated that by 2030, an additional 1.4 billion people will live in cities, of which 1.3 billion will dwell in cities of developing countries. The increasing number of buildings has long-term impacts on both the environment and natural resources. ...


    By Worldwatch Institute

  • IEA report finds `World is not on Track` to meet climate goals

    The International Energy Agency released a new report today, Redrawing the Energy-Climate Map, finding that global energy-related carbon dioxide (CO2) emissions in 2012 increased by 1.4 percent, ...

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