Gas  Analysers

ADC’s range of gas monitors are invaluable tools for a variety of research applications, from portable multi-gas detectors for immediate gas sensing, to long-term unattended carbon dioxide monitors. The rapidly rising level of atmospheric carbon dioxide is an issue of global, economic and political importance. The facts about global warming are often debated, but the increasing CO2 levels are real and measurable. To measure atmospheric CO2, ADC has designed the Lambda T CO2 monitor which employs a novel twin wavelength infrared gas analyser. This new technology provides highly stable analysis, enabling the Lambda T to be used for unattended measurement and control of CO2 . The Lambda T has facilitated work into a diversity of carbon dioxide research. A growing research topic that is part of an overall carbon management strategy is carbon sequestration into biotic systems. The rate at which excess atmospheric carbon is assimilated into above and below ground biomass has a large effect on the balance of CO2 that remains in the atmosphere. Globally, the amount of carbon in biomass is over three times the amount of atmospheric carbon; while atmospheres contain approximately 750 gigatons of carbon, soil biomass contains 1,500 gigatons, and vegetation contains 560 gigtons. Therefore, biotic systems have become a major focus of research in maintaining a balanced global carbon cycle. The rate that atmospheric carbon is drawn down into above and below ground biomass is controlled by the global net rate of photosynthesis, since carbon moves into soils when plants die and decompose. Research on carbon sequestration focuses on mitigating the emissions from human industry. Since the industrial revolution, atmospheric CO2 has risen from 280ppm to around 390ppm, leading to questions such as how plant growth was affected by the transition from preindustrial to current CO2 concentration, and how plant growth is likely to respond in the future. ADC instrumentation has been vital to research into these important themes in conditions of elevated CO2 such as greenhouses and growth chambers. Some recent research suggests that a high CO2 environment could enhance crop yields. This is of huge socio-economic value since it could pave the way for breeding genotypes which are more productive in future atmospheres. ADC BioScientific also supplies a PGA (Portable Gas Analyser) designed for a wider range of geoscience research applications. The new Portable Gas Analyser measures a number of gases in an extensive selection of measurement ranges. Weighing just 5kg and offering 8 hours of continuous use, the PGA is offers new levels in portability and performance.

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