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Laramie, WY -- In-Situ, Inc. has announced the release of their new and integrated RuggedDO (RDO) sensor for the Multi Parameter TROLL 9000 (MP TROLL 9000) water quality probe. The new RDO sensor utilizes recent advances in lifetime-based optical fluorescence sensor technology to provide an extremely stable, precise and low maintenance dissolved oxygen sensor.
The technical improvements afforded by this proven technology stand to revolutionize the current methods of water quality monitoring. Most notably - the innovative RDO sensor from In-Situ eliminates problems associated with traditional DO sensors by: eliminating the need for membranes, eliminating the need for stirring and allowing deployment for many months without need for re-calibration.
Technology addresses an age-old problem:
Dissolved Oxygen (DO) is one of the single most important parameters monitored when examining aquatic biology and related processes. Until recently the ability to accurately monitor dissolved oxygen levels over long periods of time was limited. Existing techniques (electrochemical sensors) require sample stirring and are functionally limited by the durability of their membrane and electrode, while galvanic diffusion types offer characteristically slow response.
The new RDO sensor from In-Situ provides superior performance to traditional DO sensing technology currently on the market, through incorporation of the latest micro-optical and microcomputer advances into a small-yet rugged sensor. The micro-optical technology incorporated in the RDO sensor centers around the extensively field-proven methodology of Lifetime-based Luminescent Dissolved Oxygen detection. This solid-state method uses LEDs to excite a fluorescent material, while an optical receptor gauges the duration, or lifetime, of the event. The duration of fluorescence is inversely proportional to the ambient amount of dissolved oxygen in the water.
This simple, yet elegant technology is rapidly gaining considerable industry attention. Environmental Industry interest in the RDO sensor is centered around the fact that in many instances it can remain deployed through entire testing seasons - spanning months without calibration; at the same time retaining its accuracy in even the harshest of fouling environments, without the need for stirring. When viewed from the bottom line, benefits of this sensor are not only the time/money saved with freedom from calibration, but also notably reliable and accurate test data.
Features and Advantages of RDO:
A number of notable features and advantages are imparted by the RDO sensor technology and design. The RDO sensor has been extensively tested and shown to provide many advantages to the user, namely accuracy, reliability and ease of use.
Features allowing this include:
“Solid-state Design” – which dramatically increases reliability, at the same time eliminates the need for monthly maintenance and consumables.
“No Need for Routine Calibration” - saves considerable time and money in both manpower and consumables.
“ Very Low Drift” – means more accurate data and test reliability.
“No Stirring Required” – provides foolproof deployment, accurate test results and increased confidence in any environment.
“Low Impact of Bio-fouling” - translates into longer-term deployment, saving time and money.
“Very High & Repeatable Accuracy” – provides the owner with the ability to produce consistent data sets with a high degree of confidence over a long period of time.
A number of preliminary tests have shown the sensor to closely track the accuracy, repeatability and precision of Winkler Titration. The In-Situ RDO sensor has been preliminarily tested to meet or exceed the following specifications: Range (0 to 20 mg/L), Resolution (0.01 mg/L) and Accuracy (+/- 1% of Reading or 0.02 mg/L, whichever is greater). This highly accurate and durable sensor is packaged to fit inside a new nosecone and conveniently attaches to an existing sensor port on the In-Situ Multi-Parameter TROLL 9000 water quality probe.
The MP TROLL 9000 is a compact 1.79” diameter water quality probe, with options to monitor Temperature, Pressure, Level and Depth, DO, Conductivity, pH, ORP, TDS, Resistivity, Salinity, Nitrate, Chloride, Ammonium, & Turbidity. The MP TROLL 9000 interfaces with the RuggedReader, a waterproof (IP-67) Personal Digital Assistant (PDA) or with any laptop computer or SDI-12 logger. Intuitive and feature-rich software (Win-Situ 4.0) is included with the MP TROLL 9000. The new RuggedDO sensor is now available to order, with expected delivery in May 2004.
For over 25 years, In-Situ, Inc. has been building world-class environmental monitoring instrumentation. Around the world, governments and citizens are recognizing the impact of human activities on the natural environment. In both industrialized and developing nations, the expertise of professionals is required to protect and ensure the safety of groundwater and surface water resources. In-Situ's mission is to provide these experts with the tools they need for reliable, accurate assessment of current and long-term site conditions.
MP TROLL 9000, RuggedDO, RDO, and WinSitu are registered trademarks of In-Situ, Inc. in the United States and/or other countries. The names of actual companies and products mentioned herein may be the trademarks of their respective owners.
For more information on In-Situ products contact:
Mr. Forbes Guthrie
In-Situ, Inc.
Telephone: 1-800-446-7488
Email: fguthrie@in-situ.com
Web site: http://www.In-Situ.com/
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