Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New gas sensors for monitoring carbon dioxide sinks - A world first presented at IFAT 2008

08.05.2008
A novel gas sensor system makes it possible to monitor large areas cost-effectively the first time. The patented gas sensor is based on the principle of diffusion, according to which certain gases pass through a membrane faster than others.

Using a tube-like sensor it is possible to measure an average gas concentration value over a certain distance without influencing or distorting conditions in the measuring environment. If such sensors are laid in a particular pattern, it is possible to calculate the concentration of a gas over an area. The measuring tube can therefore replace a large number of individual sensors, making it much cheaper than previous methods.

The sensor was developed at the Helmholtz Centre for Environmental Research (UFZ) and is being presented for the first time at the 15th International Trade Fair for Water – Sewage – Refuse - Recycling (IFAT), which is taking place from 5 to 9 May in Munich.

Potential fields of application for the membrane-based gas sensors ("MeGa") are environmental remediation and landfill monitoring. But in future the technology could also be used to monitor gas pipelines, the formation of hydrogen sulphide in waterbodies or the underground injection of carbon dioxide. The principle can also be used in liquids, so the probe is also useful for monitoring waterbodies, including groundwater, and for monitoring boreholes. The slimline construction of the borehole and waterbody probe means that it can be used in gauges. The (permanent) connection to the part above ground allows data capture/evaluation to take place while the probe is submerged. A device with these features has never previously been available anywhere in the world. Another potential field of application is process monitoring in water treatment or in the food industry, e.g. in breweries and dairies.

The researchers are hoping that in future their system can also contribute to more intelligent ventilation of indoor spaces. An excessive level of carbon dioxide leads to fatigue and health problems, while excessive ventilation means a waste of energy. In classrooms, lecture theatres of all kinds and in workplaces there are therefore recommendations for indoor air concentrations of 1000 and 3000 ppm. "Monitoring these indoor air concentrations has failed so far because of a lack of suitable, reasonably priced measuring methods linked to appropriate ventilation technology", explains Dr Detlef Lazik from the UFZ. "With our membrane-based gas sensors it is for instance possible to have decentralised ventilation using a ventilator that is controlled by a gas sensor. The ventilation is then simply switched on if an adjustable threshold value is exceeded." The same principle can be used for monitoring dangerous substances in buildings and facilities.

The Helmholtz Centre for Environmental Research (UFZ) will be represented at IFAT 2008, the specialist trade fair for water, sewage, refuse and recycling, in Munich from 5 to 9 May 2008. Experts at the UFZ stand (Stand 207) in Hall B1 will be providing information about managing contaminated sites and presenting the latest environmental technologies and new products. As well as MeGa, a membrane-based gas sensor for measuring carbon dioxide in waterbodies and in the soil, the UFZ will be displaying Carbo-Iron (a novel material for in situ remediation), RF-Heating (soil remediation through targeted heating) and Compartment Transfer (breaking down hazardous substances using semi-natural wetlands).

Further information from:

Dr Detlef Lazik
Helmholtz Centre for Environmental Research (UFZ)
Tel: +49 345 558 5209
and
Dr Jens Hagenau
Helmholtz Centre for Environmental Research (UFZ)
Tel: +49 345 558 5408
or from Tilo Arnhold (UFZ press office)
Telephone: +49 341 235 1269
Email: presse@ufz.de

Tilo Arnhold | UFZ Leipzig-Halle
Further information:
http://www.ufz.de/index.php?en=16708
http://www.ufz.de/index.php?en=16663
http://www.ufz.de/index.php?de=13963

More articles from Trade Fair News:

nachricht Fraunhofer IPT presents platform for automated precision assembly of polarized optical fibers
02.07.2019 | Fraunhofer-Institut für Produktionstechnologie IPT

nachricht Fingerprint spectroscopy within a millisecond
24.06.2019 | Fraunhofer-Institut für Angewandte Festkörperphysik IAF

All articles from Trade Fair News >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Artificial neural network resolves puzzles from condensed matter physics: Which is the perfect quantum theory?

For some phenomena in quantum many-body physics several competing theories exist. But which of them describes a quantum phenomenon best? A team of researchers from the Technical University of Munich (TUM) and Harvard University in the United States has now successfully deployed artificial neural networks for image analysis of quantum systems.

Is that a dog or a cat? Such a classification is a prime example of machine learning: artificial neural networks can be trained to analyze images by looking...

Im Focus: Extremely hard yet metallically conductive: Bayreuth researchers develop novel material with high-tech prospects

An international research group led by scientists from the University of Bayreuth has produced a previously unknown material: Rhenium nitride pernitride. Thanks to combining properties that were previously considered incompatible, it looks set to become highly attractive for technological applications. Indeed, it is a super-hard metallic conductor that can withstand extremely high pressures like a diamond. A process now developed in Bayreuth opens up the possibility of producing rhenium nitride pernitride and other technologically interesting materials in sufficiently large quantity for their properties characterisation. The new findings are presented in "Nature Communications".

The possibility of finding a compound that was metallically conductive, super-hard, and ultra-incompressible was long considered unlikely in science. It was...

Im Focus: Modelling leads to the optimum size for platinum fuel cell catalysts: Activity of fuel cell catalysts doubled

An interdisciplinary research team at the Technical University of Munich (TUM) has built platinum nanoparticles for catalysis in fuel cells: The new size-optimized catalysts are twice as good as the best process commercially available today.

Fuel cells may well replace batteries as the power source for electric cars. They consume hydrogen, a gas which could be produced for example using surplus...

Im Focus: The secret of mushroom colors

Mushrooms: Darker fruiting bodies in cold climates

The fly agaric with its red hat is perhaps the most evocative of the diverse and variously colored mushroom species. Hitherto, the purpose of these colors was...

Im Focus: First results of the new Alphatrap experiment

Physicists at the Max Planck Institute for Nuclear Physics in Heidelberg report the first result of the new Alphatrap experiment. They measured the bound-electron g-factor of highly charged (boron-like) argon ions with unprecedented precision of 9 digits. In comparison with a new highly accurate quantum electrodynamic calculation they found an excellent agreement on a level of 7 digits. This paves the way for sensitive tests of QED in strong fields like precision measurements of the fine structure constant α as well as the detection of possible signatures of new physics. [Physical Review Letters, 27 June 2019]

Quantum electrodynamics (QED) describes the interaction of charged particles with electromagnetic fields and is the most precisely tested physical theory. It...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on UV LED Technologies & Applications – ICULTA 2020 | Call for Abstracts

24.06.2019 | Event News

SEMANTiCS 2019 brings together industry leaders and data scientists in Karlsruhe

29.04.2019 | Event News

Revered mathematicians and computer scientists converge with 200 young researchers in Heidelberg!

17.04.2019 | Event News

 
Latest News

A human liver cell atlas

15.07.2019 | Life Sciences

No more trial-and-error when choosing an electrolyte for metal-air batteries

15.07.2019 | Power and Electrical Engineering

Possibilities of the biosimilar principle of learning are shown for a memristor-based neural network

15.07.2019 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>