Dissolved oxygen meter stays accurate over decades
February 2003
Analytical Instrumentation & Environmental Monitoring
It is the dream of any technician working on a high-accuracy plant, such as wastewater, to have instruments that are still accurate after 10 years of operation - even if it means having to manufacture these instruments from gold and silver. Danfoss says that it has turned this dream into reality with the development of its Ole_LINK1EVITA* OXY dissolved oxygen sensor.
Using gold as cathode and a silver wire as anode, the EVITA meets the toughest environmental standards, offers high accuracy and introduces flexible pricing through a modular design. It also lays claim to the industry's only truly disposable Clark oxygen sensor - replaceable in just five minutes.
"Whether you are equipping a single-basin installation or an entire computer-controlled plant, this product range allows you to meet your exact price/performance requirements through a diverse choice of components and configurations," says Mick Baugh, Danfoss business unit manager, motion control and flow.
With a turndown of 1:1000 and automatic compensation for temperature, pressure, relative humidity and salt concentration, EVITA more than complies with the high-accuracy standards of EN 25814. In addition, the five-minute-replacement disposable oxygen sensor means it can still be equally accurate after a decade of operation.
The device requires no special cables, nor are there any complicated diagrams to be followed. "You simply press a button and the system calibrates itself," says Baugh. "There is no need to calibrate the zero point either, as the low-cost disposable sensor gets replaced before zero-point calibration becomes necessary."
EVITA also keeps an eye on itself through a comprehensive self-monitoring program, and instantly lets the operator know if there is a problem with the sensor, transmitter, cable or electronics. Unique features include real membrane leakage detection, which allows faults in the sensor membrane to be detected within 35 seconds, using direct resistance measurement. Similarly, real sensor lifetime monitoring ensures continuous accuracy. EVITA also incorporates an oxygen profile controller for lifetime economy.
"One of the biggest advantages of EVITA, is that it needs vastly less maintenance than traditional oxygen meters," says Baugh. "Maintenance checks are needed only 2 to 6 times a year." An 'auto clean' floating ball uses the water's motion to clean the sensor membrane, negating the use of chemicals, fresh water or power.
Danfoss has sold more than 70 000 sensors over 20 years of operation in oxygen measurement and has focused on developing products that are more accurate, simpler to use and less costly. Testimony to the success of this approach can be seen in the company's growing market share throughout Europe, North America, Africa and Asia.
For more information contact Mick Baugh, Danfoss, 011 803 8390, [email protected], www.danfoss.co.za
Further reading:
Elevating mining separation processes through precision instrumentation
Endress+Hauser South Africa
Analytical Instrumentation & Environmental Monitoring
In mining operations, the quest for efficiency and productivity is key. There is an urgent need for innovative solutions to enhance the performance of extraction processes while balancing operational costs and environmental impact.
Read more...
Alfa Laval launches next generation
Analytical Instrumentation & Environmental Monitoring
Alfa Laval has launched Clariot, a next generation, AI-based condition monitoring solution, precision-built for hygienic process equipment to deliver more accurate analysis and support.
Read more...
The next generation in metal sorting
Mecosa
Analytical Instrumentation & Environmental Monitoring
In the metal recycling industry, companies are increasingly challenged to not only improve the efficiency of their processes but also to raise the quality and purity of the sorted materials to new levels. By integrating proven spectral analysis technology into its market-leading REDWAVE XRF sorting system, REDWAVE is unlocking new opportunities for metal recycling, particularly in aluminium recovery.
Read more...
Ensuring clean and safe water
Endress+Hauser South Africa
Analytical Instrumentation & Environmental Monitoring
Endress+Hauser’s comprehensive range of disinfection sensors are designed to monitor and control disinfectant levels in water treatment processes.
Read more...
Anton Paar launches inline refractometers for precision Brix monitoring
Anton Paar
Analytical Instrumentation & Environmental Monitoring
[Sponsored] Anton Paar has introduced innovative inline refractometers that are designed for continuous Brix concentration monitoring in metalworking machines, fruit and vegetable processing and other industrial processes.
Read more...
Supporting fast, safe helicopter service across Sweden
ATEQ South Africa
Analytical Instrumentation & Environmental Monitoring
In an environment with high risks and fierce competition, Storm Heliworks’ fleet of eight helicopters operates on assignments throughout Scandinavia. Maintenance is critical, and the company recently invested in a battery charger analyser from ATEQ Aviation.
Read more...
WearCheck introduces advanced Legionella testing to safeguard water quality
Wearcheck
Analytical Instrumentation & Environmental Monitoring
WearCheck Water has expanded its expertise in water analysis with the introduction of Legionella pneumophila detection and enumeration. This positions the company at the forefront of water and surface safety monitoring, ensuring businesses, industries, and public institutions can proactively manage legionella contamination risks.
Read more...
Silo weighing made easy - new mounting kit for load cells
Analytical Instrumentation & Environmental Monitoring
The PR 6003 mounting kit features fast commissioning in demanding applications in industrial silo weighing. It combines maximum accuracy with maximum safety in a compact system.
Read more...
Inline beverage analyser leverages advanced multi-parameter technology
Analytical Instrumentation & Environmental Monitoring
[Sponsored] The Cobrix 7501/7601 inline beverage analyser leverages advanced multi-parameter technology to enhance quality control in carbonated soft drink production.
Read more...
Smart weighing boosts Bayer’s automation
Analytical Instrumentation & Environmental Monitoring
he new supply centre of the agricultural chemical and pharmaceutical company Bayer in Hangzhou integrates weighing technology of Minebea Intec for precise mixing and homogenisation in Zone 2 hazardous areas.
Read more...
printer friendly version