passive diffusion News

  • AQMesh can also be scaled using diffusion tubes

    The AQMesh team has carried out a test which shows that calibration (scaling) of AQMesh against one, or ideally several, diffusion tubes, is a viable option when no local reference station is available. When three AQMesh pods and four NO2 diffusion tubes were co-located against a reference station, the diffusion tube readings were so consistent with the reference average reading for the period ...


    By AQMesh

  • Speed is the name of the game as Enviro Technology launches rapid diffusion samplers

    Local authorities and businesses seeking fast, cost effective air monitoring need look no further than air quality monitoring specialists, Enviro Technology’s brand new range of Rapid Diffusion Samplers.   Ideal for all rapid indoor, outdoor, personal and workplace air monitoring of volatile organic compounds (VOCS) and Nitrogen Dioxide, Rapid Diffusion Samplers offer a quick, low ...

  • Fast uptake Nitrogen dioxide and VOC monitoring using passive sampling techniques - Rapid Air Monitors

    Leading supplier of air pollution monitoring equipment, Gradko Environmental, is pleased to announce the first products in its new range of Rapid Air Monitors. Environmental consultants globally have been looking for faster passive methods of measuring ambient air pollution, particularly for inorganic compounds. Gradko have responded to this market need with the introduction of the Rapid Air ...


    By Gradko International Ltd

  • ASTM D7758 - 11 Standard Practice for Passive Soil Gas Sampling in the Vadose Zone for Source Identification, Spatial Variability Assessment, Monitoring, and Vapor Intrusion Evaluations

    Passive soil gas samplers are a minimally invasive, easy-to-use technique in the field for identifying VOCs and SVOCs in the vadose zone. Similar to active soil gas and other field screening techniques, the simplicity and low cost of passive samplers enables them to be applied in large numbers, facilitating detailed mapping of contamination across a site, for the purpose ...


    By ASTM International

  • Waterloo Emitter™

    The Waterloo Emitter is a simple, low cost device designed for the controlled and uniform release of oxygen, or other bioenhancing amendments, to encourage and sustain the growth of microorganisms required for in-situ bioremediation of contaminated groundwater. The patented technology* enables steady, direct diffusion of oxygen into an aquifer through pressurized silicone or LDPE tubing. ...


    By Solinst Canada Ltd.

  • Better Remediation Through Effective Groundwater Sampling

    One of the keys to successful remediation of a contaminated property is effective groundwater sampling. A new ASTM standard will aid groundwater samplers by taking a look at three types of passive samplers and their advantages, disadvantages and limitations. The new standard is D7929, Guide for Selection of ...


    By ASTM International

  • Gradko Attending the Air Quality and Emissions Show 2013

    Gradko will be attending the AQE 2013 show in Telford on 13-14th March. This years show is an expansion of the usual MCERTS exhibition to include all aspects of air quality monitoring, allowing visitors to see all the latest technology at one event. We will be exhibiting our full range of diffusion tubes for monitoring of VOCs, NO2, NOx, O3, SO2, Acid ...


    By Gradko International Ltd

  • AQMesh can complement air quality models, reference and indicative data sources

    Leading air quality small sensor system, AQMesh, has recently been shown to work alongside passive samplers and air quality models, as well as complementing reference station networks. A recent study shows AQMesh calibration against diffusion tubes and two 2017 conferences have highlighted the potential of such systems used in an air quality network. At the Dispersion Modellers User Group Meeting ...


    By AQMesh

  • Natcore Receives Exclusive License from NREL to Develop "Black Silicon" Solar Cells

    Natcore Technology Inc. (TSX VENTURE: NXT)(PINKSHEETS: NTCXF) has been granted a patent license agreement from the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) to develop and commercialize a line of black silicon products--including equipment, chemicals, and solar cells---based on NREL patents. The license grants Natcore exclusivity in the field of diffused emitters ...


  • Low cost photo-ionisation detector launched

    Oliver IGD Limited is excited to announce the latest addition to their comprehensive range of sensors with the release of the Tocsin 102 PID (Photo-ionisation) ATEX Certified detector. The Tocsin 102 PID is capable of detecting over 400 chemical substances allowing this sensor to be a major part of any detection system covering VOC’s, HAZMAT, WMD’s, Toxic Gases, Bio-threats, Trace Gases and ...

  • EPA outlines next steps at the capital city plume site in Montgomery, AL

    EPA will communicate to building owners and the general public the results of indoor air quality and outside soil vapor sampling that took place in mid-August 2011 as soon as those results are available. If warranted by the results of the sampling data, EPA may undertake additional sampling and/or mitigate exposure to contaminants through indoor air utilizing its emergency response ...

  • Particles progress report

    BEST PRACTICAL ENVIRONMENTAL OPTION (BPEO) PROCESS The BPEO sets out the proposals for seabed clean-up with a targeted seabed area, where most significant and relevant particles are believed to be located following examination of available data by DPAG, of 60 hectares. A contract has now been let with LMPE for the construction of a new ROV and its operation to recover ...

  • Gray Modules: New Dimension in Organic Photovoltaics for Buildings

    Merck, a leading science and technology company, announced that semi-transparent gray-colored organic photovoltaic (OPV) modules are now available on the market. The new materials, which were successfully developed together with Belectric OPV, were recently presented to the public at the Adaptive Architectures and ...


    By Merck

  • 19-21 MAY 2005: SOLAREXPO REVS UP FOR THE BIGGEST RENEWABLE ENERGY EVENT IN ITALY AND SOUTHERN EUROPE

    After the undisputed success of last year’s edition, from May 19 to May 21 Vicenza Fair, Italy, is ready to open its gates to Solarexpo 2005, recognized as the leading renewable energy event in the whole Euro-Med area. Mirroring the dynamic ...


    By Expoenergie srl.

  • Environmental considerations

    This part of the presentation addresses environmental considerations related to desalination. Large-scale seawater desalination projects are now being developed in locations where they never had been previously considered. In the last eight years, plants have begun to be developed and constructed in Australia, Europe, India and the US. Some of these projects are located on extremely ...

  • Greening government buildings - leading by example

    From airport terminals in rural Canada, sky-high green roofs, to state-of-the-art buildings in urban centres, the Government of Canada is leading the way when it comes to sustainable building design. All over the country, Public Works and Government Services Canada (PWGSC) is finding innovative ways to green government operations and ...


    By GLOBE Foundation

  • Suntech Launches Two High-Performance Solar Products in the Americas

    Suntech Power Holdings Co., Ltd. (NYSE: STP), the world's largest producer of solar panels, has launched two new high-performance solar panels immediately available for purchase in the United States, Canada and Latin ...

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