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Talking about Several Factors affecting the Determination of Oxygen Analyzer

KE-210 oxygen analyzer adopts imported electrochemical, ion current, zirconium oxide or magnetic oxygen sensor, and is a new intelligent industrial-grade gas analyzer developed by combining advanced MCU technology.

When performing oxygen content analysis, especially trace oxygen analysis, the oxygen content in the air is as high as 21% oxygen, and if it is handled improperly, it will easily cause contamination and interference to the sample, and the analysis result data will be incorrect. The main reason is improper operation of the oxygen detector. The following only talk about a few factors that affect the determination:

1. Simplification and cleanliness of the gas system of the oxygen detector.

Trace oxygen analysis requires that the contamination of sample gas caused by dead corners in various pipe fittings, valves, meters, etc. on the gas path must be effectively eliminated. Therefore, the gas circuit system should be simplified as much as possible, and connectors with small dead angles should be selected. In addition, avoid the use of water seals, oil seals and wax seals to prevent dissolved oxygen from escaping and causing pollution. It is also necessary to avoid adding purification equipment that can easily cause pollution in the pipeline leading to the inlet of the oxygen analyzer. Only in this way can the system be clean and the data obtained can be accurate.

2. Pollution of the oxygen detector.

When reusing the oxygen detector, first pay attention to whether air leaks when connecting the sampling line, and must carefully blow out the leaked air, and try not to let a large amount of oxygen pass through the sensor to extend the life of the sensor. In the pipeline system purification process, in order to shorten the purification time, a certain method is required. Generally, high-pressure venting and small flow blowing are used alternately to quickly purify the pipeline.

3. Selection of pipe material.

Pipe material and surface roughness will also affect the change of oxygen content in the sample gas. Generally, plastic pipes, rubber pipes, etc. should not be used as connecting pipes. Copper tubes or stainless steel tubes are usually used, and polished stainless steel tubes must be used for ultra-micro analysis (referring to <0.1 ppm).

4. Leakage of oxygen detector.

The oxygen detector must be strictly leak-checked before being used for the first time. The oxygen analyzer can only obtain accurate data results under the premise of tight and leak-proof. Any connection points, welding points, valves, etc. are not tight, will cause the oxygen in the air to reverse seepage into the pipeline and the inside of the oxygen analyzer, resulting in a high oxygen content.

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