ATI Q46S/66 Residual Sulfite Monitor

ATI's Model Q46S/66 Residual Sulfite Monitor provides the solution to dechlorination control of wastewater effluents.


  • Sulfite ion is measured selectively by conversion to sulfur dioxide
  • Contact outputs include two programmable control relays for control and alarm modes
  • Communication Options for Profibus-DP, Modbus-RTU, or Ethernet-IP
Your Price Call
Drop ships from manufacturer
Free Lifetime Tech SupportFree Lifetime Tech Support
ImagePart#Product DescriptionPriceStockOrder
ATI Q46S/66 Residual Sulfite MonitorQ46S/66 Residual sulfite monitor
Request Quote
Drop ships from manufacturer

Dechlorination of wastewater effluent is common practice in many wastewater treatment facilities throughout the U.S.  Strongly reducing sulfur compounds are used to eliminate chlorine residuals that might prove toxic to fish in the receiving stream.  Because residual chlorine discharge limits are often very close to zero, monitoring residual values to comply with regulations has become very difficult, and controlling residuals at values between zero and 10 or 20 parts-per-billion is often not achievable.

To meet stringent discharge limits, the sulfite or bisulfite used for dechlorination is added in slight excess, providing a small sulfite residual to insure complete dechlorination. ATI’s Model Q46S/66 provides operators with a reliable tool for maintaining a small sulfite residual while reducing excess chemical consumption due to overfeed.

Questions & Answers
No Questions
Please, mind that only logged in users can submit questions

In The News

MIT undergrads characterize Kīlauea’s volcanic smog

“Vog” is a word that few know and use. But for people living near Hawaii’s Kīlauea, it’s the perfect mashup to describe what they deal with everyday: volcanic smog. Much of the vog that comes out of the volcano is comprised of sulfur dioxide, a compound toxic to humans and plants. It can react with components in the atmosphere to form sulfuric acid, a common component of acid rain. Particulate matter, water and carbon dioxide also float out of Kīlauea. Scientists already know that some of those emissions are toxic. They look to study the volcano’s eruption because it is unique. Kīlauea has been erupting non-stop since 1983.

Read More

Solar and Wind-Powered, Algae Tracking Boat Trialed in Florida

Time is of the essence when it comes to tracking algal blooms, and people everywhere are looking for solutions. In Florida, scientists from Florida Atlantic University Harbor Branch Oceanographic Institute (HBOI) recently trialed a solar-powered, algae-tracking sail boat developed by Navocean , Inc. Dr. Jordon Beckler of Florida Atlantic University (FAU) directs HBOI's Geochemistry and Geochemical Sensing Lab and spoke to EM about the trials and the boat. "This boat is so amazing when you see it in action," remarks Dr. Beckler. "Navocean originally contacted me a few years back about a demonstration when I was over at my previous institution in West Florida, and we brainstormed some scenarios for employing the boat for harmful algae bloom monitoring.

Read More

CICHAZ Biological Field Station Provides A Unique Educational and Research Experience in Mexico’s Huasteca Region

The story of the Centro de Investigaciones Científicas de las Huastecas "Aguazarca" (CICHAZ) Biological Field Station, a member of the Organization of Biological Field Stations ( OBFS ), starts with Dr. Gil Rosenthal, Professor of Biology and Chair of Ecology and Evolutionary Biology at Texas A & M University . Rosenthal has worked in the Huasteca region of Mexico since 1994 and for years kept his research equipment at a local ranch/hotel with the dream of one day having a field station where he could run experiments with collaborators and students. Since 2005, Rosenthal has been the Co-Director of the field station along with his wife, Dr.

Read More