Gas sensors developed in a European project now enable the implementation of cheaper and smaller instruments with equal or higher speed and sensitivity than current laboratory-grade instruments.
Production of super-sensitive and portable measuring devices is made possible by a photo-acoustic gas sensor with innovative parts such as an interferometer and a MEMS cantilever. While a laser is needed as infrared light source for the highest sensitivity, novel IR LEDs are sufficient for measuring fairly small gas concentrations in lower cost portable devices.
Sensitive, portable measuring devices can be used to detect trace gases in the environment. There are a number of potential applications for the technology, for example in health care and air pollution monitoring. The technology can also be used in homeland security and work safety.
The MINIGAS project was financially supported by the European Community and was coordinated by VTT Technical Research Centre of Finland. It involved building two prototypes, one of which can be used to detect extremely low levels of methane in the air and the other to accurately measure carbon dioxide and water vapour levels in demanding Greenhouse gas flux monitoring. The performance of the portable measuring devices matches that of existing laboratory-grade products.
Several measurement industry companies are preparing to begin production based on the new technology. Furthest advanced is Finland-based Gasera Oy, which already uses the parts developed in the project in its current gas sensors. The company hopes to be selling new products based on the technology within three years. Measuring instrument companies Selex (Italy) and Dräger (Germany), as well as LED component developer and manufacturer IoffeLED (Russia), plan to use or further investigate parts of the developed technologies for future products.
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