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Low-level dissolved oxygen sensors

Last updated: 20 Feb 2026
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ABB’s AeroStar™ Ultra series of digital sensors deliver ultralow (to sub-ppb) level dissolved oxygen measurement with unmatched precision and reliability, making it the ideal solution for ultrapure water measurements in power, semiconductor, and beverage industries.

Engineered for environments where downtime is costly, the AeroStar™ Ultra sensors ensure stable, accurate, and low-maintenance performance through its advanced luminescence quenching optical design.

These digital sensors are able to analyze and condition the signal, which is then transmitted to the latest AWT424 transmitter, featuring ABB’s EZLink™ technology. Furthermore, this yields a range of predictive diagnostics and a real-time health check feature alongside our standard connect and measure ability.


AeroStar™ Ultra Trace
Measuring range: 0.8 ppb to 2ppm
Accuracy:  0.5 ppb, or 2 %
Response time : t90 < 90 s
Cap : AeroStar Ultra Trace Cap

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Low-level dissolved oxygen sensors
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