Featured Research

from universities, journals, and other organizations

Miniaturized mobile ozone detector works in air, water and near explosive gases

Date:
January 19, 2010
Source:
Fraunhofer-Gesellschaft
Summary:
Researchers have developed a highly-sensitive, miniaturized mobile ozone sensor which can be used not only in air, but also in water and in the vicinity of explosive gases.

Researchers in Freiburg have developed a highly-sensitive, miniaturized mobile ozone sensor which can be used not only in air, but also in water and in the vicinity of explosive gases.

The Fraunhofer Institute for Applied Solid State Physics IAF in Freiburg is developing improved chemical sensors that are not prohibitively expensive. One particularly important area of application involves the regular measurement of ozone content in air and other media. This gas is a powerful oxidizing agent and can cause a wide range of symptoms in humans, including lacrimation, irritation of the mucous membranes in the mouth, throat, and bronchial tubes, headaches, coughing and even deterioration in lung function. The main sources of ozone pollution are industrial and transport emissions; particularly in warmer weather, these react with intensive UV radiation to form ground-level ozone. But laser printers and copiers, machines so prevalent in modern-day offices, can also emit ozone.

The European Commission has announced its intention to cut the guideline value for ozone in the air from the current level of 90 parts per billion to 60 parts per billion by 2010, and when this new regulation comes into force, there will be an increased demand for inexpensive ozone sensors. But as project manager Dr. Volker Cimalla of the IAF explains: "Since ozone is, at the same time, an agent with high application potential, novel sensors are required, which have to be compact and affordable." Sensors are essential equipment in industrial settings such as wastewater treatment facilities and water sterilization units, where they are used to monitor the ozone concentration -- firstly to ensure the required concentration for the relevant application is maintained, and secondly to guard against exceeding hazardous thresholds for humans.

Project manager Cimalla says: "The ozone sensors currently available on the market employ extremely laborious and complex measuring procedures such as UV absorption and are therefore very expensive. By contrast, the more affordable ozone sensors have to be heated up to 300 degrees Celsius and produce inaccurate readings or only work in limited areas of application. We've done away with the need for heating by instead applying blue/violet light radiation to trigger the chemical process necessary for regeneration on the sensor surface -- this allows the sensors to operate at room temperature." The scientists built on the existing knowledge that molecules absorbed on the surface of a sensing layer alter its electrical resistance -- and can also be removed again by light irradiation. The result is a highly-sensitive, miniaturized sensor capable of measuring the low ozone levels that occur in environmental and ambient air monitoring just as accurately as the high levels associated with industrial process control. And since the sensor is extremely small, it can even be integrated into mobile equipment.


Story Source:

The above story is based on materials provided by Fraunhofer-Gesellschaft. Note: Materials may be edited for content and length.


Cite This Page:

Fraunhofer-Gesellschaft. "Miniaturized mobile ozone detector works in air, water and near explosive gases." ScienceDaily. ScienceDaily, 19 January 2010. <www.sciencedaily.com/releases/2010/01/100118091915.htm>.
Fraunhofer-Gesellschaft. (2010, January 19). Miniaturized mobile ozone detector works in air, water and near explosive gases. ScienceDaily. Retrieved July 30, 2014 from www.sciencedaily.com/releases/2010/01/100118091915.htm
Fraunhofer-Gesellschaft. "Miniaturized mobile ozone detector works in air, water and near explosive gases." ScienceDaily. www.sciencedaily.com/releases/2010/01/100118091915.htm (accessed July 30, 2014).

Share This




More Matter & Energy News

Wednesday, July 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Climate Change Could Cost Billions, According To White House

Climate Change Could Cost Billions, According To White House

Newsy (July 29, 2014) A report from the White House warns not curbing greenhouse gas emissions could cost the U.S. billions. Video provided by Newsy
Powered by NewsLook.com
Stranded Whale Watching Boat Returns to Boston

Stranded Whale Watching Boat Returns to Boston

Reuters - US Online Video (July 29, 2014) Passengers stuck overnight on a whale watching boat return safely to Boston. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Baluchistan Mining Eyes an Uncertain Future

Baluchistan Mining Eyes an Uncertain Future

AFP (July 29, 2014) Coal mining is one of the major industries in Baluchistan but a lack of infrastructure and frequent accidents mean that the area has yet to hit its potential. Duration: 01:58 Video provided by AFP
Powered by NewsLook.com
Easier Nuclear Construction Promises Fall Short

Easier Nuclear Construction Promises Fall Short

AP (July 29, 2014) The U.S. nuclear industry started building its first new plants using prefabricated Lego-like blocks meant to save time and prevent the cost overruns that crippled the sector decades ago. So far, it's not working. (July 29) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins