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Bengt Löfstedt
Operative Support, OPSIS AB

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Gas Concentration Units and Unit Conversions

Gas Concentration Units and Unit Conversions

On the most fundamental level, the signal from the sensor of a gas analyser gives the number of gas molecules, usually along an optical light beam or in a certain sampling volume. However, a concentration should not be expressed in number of molecules – the number would be far too big. Instead, it is scaled to a unit of weight-per-cubic-metre or volumetric share. How is the scaling done?
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