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Metso Develops Density Transmitter for Total Solids Measurement

July 20, 2006

Microwave-based device measures biosolids for wastewater treatment process.

NORCROSS, GA, /BUSINESS WIRE/ -- kajaaniTS from Metso Automation, developed from third-generation microwave density transmitters, combines cost efficiency with the extreme accuracy associated with microwave technology to measure wastewater biosolids (sludge).

Microwave technology has been used to measure density in process industries for well over a decade. By using microwave technology, the kajaaniTS transmitter meets the needs of wastewater treatment plants, with no compromises in accuracy. The kajaaniTS can be used on low to high solids measurement, including primary sludge, dewatering, and dewatered cake applications.

One wastewater reclamation facility in Michigan, treating 28 million gallons per day, half from industrial users, is using the kajaaniTS transmitter in an "activated sludge" wastewater process. The facility has six primary settling tanks and seven secondary clarifiers, as well as four belt-filter presses for handling solids. Since adding the kajaaniTS transmitter to their primary sludge application, they have benefited from pumping optimization.

Benefits of total solids measurement:

  • Lower polymer consumption
  • Fewer laboratory analysis
  • Reduced handling charges by controlling solid content
  • More efficient use of digesting
  • Pumping optimization in primary sludge

When applied to the wastewater treatment process, microwave technology offers significant advantages over other types of total solids measurements.


  • Single-point calibration
  • Maintenance-free operation
  • Ceramic sensors that resist product buildup

The interface between the kajaaniTS transmitter and the plant control systems are ensured. kajaaniTS is available with mA+HART, Profibus PA, or Foundation Fieldbus connectivity. DTM descriptions provide connectivity with FDT-based configuration and operation monitoring systems.

For more information, contact Craig Hannah at Metso Automation, 2900 Courtyard Dr., Norcross, GA, 30071; 678-772-9584; or visit our Web site.

Kajaani is either a trademark or a registered trademark of Metso Automation in the U.S., Canada, Finland, and/or other countries.

About Metso Automation
Metso Automation specializes in automation and information-management application networks and systems, field control technology, and life-cycle performance services. Its main customers are the pulp and paper industry and the energy production and processing industries. Metso Automation operates worldwide and has sales and customer support units in 34 countries in Europe, North and South America, Asia and Australia, and Africa. In 2004, Metso Automation's net sales were EUR 531 million. The number of employees totaled approximately 3300. For more information, please visit our Web site.

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