xxvi UK Focus - Air Monitoring Gas Conditioning Made Easy


The PGCS is a smart solution for stack testers looking to carry out frequent stack emission tests across different sites. Stack testing is a procedure carried out by engineers to determine the concentration of gas and dust emissions being released into our atmosphere. Stack emission testing must be carried out to ensure that sites are complying with environmental standards. The amount of stack testing required is based on the size of the site and the amount of emissions, the greater the emissions the greater the need for continuous stack testing.


One of the UK’s largest MCERTS and UKAS accredited stack emissions testing contractors with extensive experience in the emissions testing industry has recently placed an order for a large quantity of Portable Gas Conditioning Systems (PGCS) from a1-cbiss Ltd.


“Versatile and neatly packaged the PGCS is the perfect portable gas sampler for emission stack testers”


The a1-cbiss ltd PGCS is designed to ensure a clean flow and accurate sample of gas, correctly prepared for the analyser in gas monitoring systems. Whilst conducting ‘on-the-spot’ detailed gas analysis a gas conditioning system is required to remove particulates, cool gas, and eliminate condensation.


Housed in a compact, highly visible and robust carrying case and weighs just 12kg, the PGCS can be easily carried up the stack to conduct gas measurements.


The PGCS features a gas cooler that is equipped with an innovative heat exchanger system. The dew point is set at 4°C but can be changed at any value between 1°C and 15°C. Optional flow meters with integrated needle valves are available. The flow meters are built-in as the electronic controller. The exterior digital display from the gas cooler and flow meter gauge can be read whilst the carry case is closed. Any condensation is continually removed by the peristaltic pump.


A heated sample line that doesn’t require external power is mounted at the gas measuring inlet terminal inside the portable case. The amount of flow is determined by a sample gas diaphragm pump. The portable gas sampling probe is connected to the heated line and is mounted within the stack for emissions testing.


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High Profile Location for New On-Line Metals in Air Analyser


Air quality monitoring specialist, Enviro Technology Services Plc has recently installed a state-of-the art, near real-time automatic metals-in-air analyser at the Marylebone Road “super-site” for King’s College London who had funding from NERC.


The XACT 625 X-ray fluorescence multi-metals system is understood to be the first of its type to be installed outside of the USA and China and will be measuring hourly average concentrations of 24 individual airborne metal elements including cadmium, arsenic, lead and chromium.


Over the last decade the components of the air that we breathe have been the subject of a great deal of scientific research and environmental regulation. No longer is the mass concentration of particles in the air the primary concern, but instead it is the species or elements that make up those particles that are important to understand.


ET’s Duncan Mounsor comments “after only ever seeing the XACT 625 system on paper it was amazing to see the system in operation here at ET prior to installation at the super-site and for such a high-tech and powerful instrument, it is actually very simple to use and requires the minimum amount of servicing and local site operation”.


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Duncan concludes: “particulate composition and characterisation is really key to our understanding of the sources and health impacts caused by particles and we are delighted to have been able to supply King’s with the XACT 625 instrument which will, I’m sure, provide them with robust and valuable data for their on-going research”.


368ad@reply-direct.com Essential Environment 36th edition:Layout 1 1/8/14 16:51 Page 1


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Essential Environment is the comprehensive guide to UK and EU environmental protection legislation.


Topics covered include:


• Industrial Pollution Control • Air Quality and Air Pollution, Climate Change, Transport Pollution


• Environmental and Neighbourhood Noise, Statutory Nuisance


• Local Environmental Quality • Waste Management, Land Quality, Contaminated Land • Water Pollution, Marine Pollution, Pesticides and Agricultural Pollution • Sustainable Development, Land Use Planning.


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IET September / October 2014 www.envirotech-online.com


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Detection of BTEX in Ambient Air


Baseline, a MOCON company, provides a measurement solution for BTEX (benzene, toluene, ethylbenzene and xylene) in ambient air. The Series 9100 Gas Chromatograph (GC) can be used for monitoring BTEX in both indoor and outdoor environments, such as workplace exposure levels, pollution controls and environmental monitoring.


The 9100 Series GC utilises a photoionisation detector (PID) for this analysis. Using a dual capillary column configuration, the analysis and separation of BTEX can be completed in 180 seconds for a quick analysis and 360 seconds for the standard analysis. With lower detection limits less than 2 ppb for benzene, 5 ppb toluene, 5 ppb ethylbenzene and 5 ppb for the xylene, the 9100 Series is an ideal fit for many BTEX monitoring applications.


Key features of the 9100 GC include automatic calibration for unattended operation, remote access and control, optional user selectable analogue outputs, graphical display of current and historical concentrations and multipoint sampling options.


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