ABB AeroStar dissolved oxygen instrument

ABB has launched the AeroStar family of dissolved oxygen sensors and the AWT424 transmitter.

Compared to traditional electrochemical sensors that can require frequent sensor replacement, calibration and maintenance, AeroStar is designed to provide stable, accurate water quality measurement with minimal maintenance.

Engineered for applications in the power, process steam, semiconductor, and food and beverage industries, where even trace levels of dissolved oxygen can compromise performance or cause corrosion, the AeroStar ULTRA measures down to four parts per billion, while AeroStar ULTRA TRACE delivers measurement capability below one part per billion (ppb). The luminescence-quenching optical design is said to offer stability and precision, with a fast response time and extended sensor cap life of up to two years — reducing maintenance by as much as 70% compared to traditional electrochemical devices.

The AeroStar sensors connect via ABB’s EZLink digital platform with the AWT424 transmitter and offer predictive maintenance alerts through the EZLink Connect App.

The next-generation AWT424 transmitter is designed to simplify and unify water measurement, allowing operators to connect and control up to four sensors simultaneously, offering a complete view of water quality, including parameters like pH/ORP, conductivity, turbidity, chlorine and dissolved oxygen.

With its modular design, the AWT424 enables operators to add and change sensors and communication modules. A full-colour TFT display and Bluetooth connectivity make real-time data accessible through ABB’s EZLink Connect App. The AWT424 also adds Modbus TCP communications, further simplifying its integration into plant control systems.