Optical Dissolved Oxygen Technology - A Brief History, Development and the Future of a New Generation of Smart Sensors.
| Date/Time: | 22 May 2012
15:45-16:00 |
Seminar Details
This presentation describes the history and development of optical Dissolved Oxygen sensors for water quality monitoring, the challenges overcome in the last 10 years and how the technology relating to luminphore sensing is likely to develop in future.
This information is relevant to managers responsible for water monitoring within the environmental and industrial process control sectors. Applications include monitoring of potable water and waste water quality to controlling water quality in fish farming, brewing and the food industry.
Delegates will learn how optical DO sensors are leading the way in the development of a whole new generation of smart sensors for in-line or long term monitoring of the water environment which provide a more accurate and stable platform with minimal maintenance and calibration requirements.
In technical terms, delegates will learn how optical DO sensors rely on lifetime-based luminescence technology to accurately measure DO levels in-situ. Optical sensors are especially accurate below 2 mg/l - a range in which most membrane sensors routinely give poor results. For example, when monitoring anoxia in open bodies of water, the ability to accurately record DO below 2 mg/l allows researchers to reliably characterize nutrient-related hypoxic zones. Optical DO sensors do not consume oxygen as part of an electrochemical reaction, and do not require sample flow for accurate readings. Additionally, sensor response time is faster, and the sensing element is more durable and has a longer operational life than an oxygen permeable membrane.
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