Introducing Seres OL Process Analyzers
A new addition to the Swan family;
an expanded offering of automated online analyzers
Now Swan can meet even more of
your online analysis needs
We're excited to introduce Seres OL as part of the Swan family, bringing you a more complete line of analyzers for the water market. Since it's inception in 1969, Seres has gone through many changes, but always with a commitment to quality. In 2019, Seres OL became part of Swan and we've spent the last year preparing the line for introduction in the US.

Across the Seres line you'll find user friendly features like a color touchscreen interface for intuitive setup and data visualization. Precise, reliable peristaltic pumps deliver reagents and titrants for accurate measurements. Many offer multi-channel options for added value. Rugged enclosures hold up to tough environments.
Seres TOC Evolution Analyzers
The Seres Evolution TOC delivers reliable measurement of total organic carbon measurement in water treatment plants, waste water plants, and industrial processes. Proven UV-persulfate oxidation with NDIR detection provides reliable results. Meets ISO 8245 and NFEN 1484. Choose from 3 models.

  • Low Range: 0-2 ppm
  • Mid-Range: 0-10 ppm
  • High-Range: 0-100 ppm

Seres Topaz Titrimetric and Potentiometric Analyzers
With precise dosing from reliable peristaltic pumps and high quality electrodes and photometers, the Seres titrimetric analyzers can solve a number of measurement problems. Click below for more details on specific models.

Seres Topaz Colorimetric and Absorptive Analyzers
Swan has long been a trusted source for photometric analyzers like chlorine, phosphate and silica. Now with the Seres OL line you'll find added measurement options with applications across a spectrum of industries. Click below for more details on specific models.

Visit the Seres OL homepage at to find out more about our product range, contact your local Swan Sales Associate, or contact us at Swan Analytical USA headquarters. We'll be happy to find if a Seres analyzer can help simplify your measurement and analyzer needs.

Thank you for taking the time to review our email. Let us know if you have any questions or feedback.


Dominic O'Donnell
SWAN Analytical USA
Marketing Director