Oxygen analyzer
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This post was last edited by metaled on 2010-11-27 at 14:32. Who can provide some information on the prices of Oxygen analyzers, as well as the costs associated with their daily use and annual operation (reagents, equipment maintenance, etc.)? How accurate is it compared to a chromatograph, and how long does it take to perform a full analysis? Do you have any suggestions for those who have used chromatographs to analyze gas? Are the equipment maintenance costs high? If a chromatography column breaks, it can cost up to 2,000 yuan, and it’s not possible to see directly whether the testing results are accurate or not. We have been using it for some time, and there have been frequent large fluctuations in the composition of the gas; we’re not sure whether this is due to inaccurate testing or poor performance of the furnace.
This post was last edited by *aojungnft on 2010-11-29 03:29. Ohsige gas analyzers are still quite widely used in China, and their accuracy is likely to be to one decimal place (expressed as a percentage). The Austat gas analyzer is suitable for use, unless it is necessary to detect components that are present in very low concentrations but are crucial. Do a full analysis, which takes about ten to fifteen minutes. I’ve only seen it used by others; for specific details, look up information online or consult the supplier. Using chromatography to analyze raw gas is somewhat extravagant; it is likely that the columns need to be replaced regularly. The accuracy is of course not an issue, and it’s easy to tell whether the readings are accurate or not. As long as the calibration gas is proper and the analysis parameters are set correctly, there’s generally no need to doubt the accuracy of the data. If a problem with the instrument is suspected, multiple parallel analyses of the same sample should be conducted; if the consistency among these results is good, then it is likely not a problem with the instrument.
A 1904 Ölshausen gas analyzer? The 1904 Austrian-style gas analyzer is very inexpensive, and the testing costs are low as well. QQ1012113826
Austrian-type gas analyzers have insufficient measurement accuracy, and it is difficult to determine the hydrogen content accurately whether using an explosion cell or a combustion cell. It’s still okay to simply measure carbon dioxide ； When measuring carbon monoxide, since a copper-ammonia solution is used as the absorbent, the release of ammonia affects the measurement accuracy, resulting in large measurement errors. As for the methane content, it’s simply impossible to measure. Chromatography is of course expensive, with many consumables required ； But its advantage lies in accurate and fast measurement. Regarding the claim by the original poster that the measurements are inaccurate, I would like to consider it from a human perspective: are the reference standards accurate? How often should the correction factor be updated? Are the same person responsible for calculating the correction factors and the person who collects the measurement data? Operating high-end instruments requires proper methods; if the methods are incorrect, the conclusions will naturally be unreliable. Moreover, the composition of the process gas is inherently variable; the key is to keep it within acceptable limits.