Analytical Technology Inc., of Oaks, Pa., announces a new “Auto-Clean” Dissolved Oxygen (D.O.) Monitor providing maintenance-free monitoring of dissolved oxygen in any wastewater aeration system. D.O. monitoring and control in wastewater aeration systems can provide large power savings and improved process operation. Unfortunately, on-line D.O. sensors have had a history of fouling problems and excessive maintenance. ATI’s new Series B15/60 D.O. monitor solves the problem by adding an automatic cleaning system that cleans the sensor at least every 24 hours.