Portable dissolved oxygen analyzer
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Used for detecting dissolved oxygen in feed water for steam boilers; the measurement values are on the ppb scale, with high accuracy.
The dissolved oxygen level in the feed water for high-pressure boilers is generally kept below 10 ppb; it is sufficient for the measuring instruments to have an accuracy of +/-1 ppb. What level of accuracy does the person asking about consider to be high? Among imported instruments, manufacturers such as Thermo Electric (Orion), Hashi (Obisphere), Mettler, and Hamilton all offer corresponding products. Among domestic manufacturers, Huakeyi offers products of relatively reliable quality.