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Topic: IR remote as spectrometer (Read 3 times) previous topic - next topic


I want to measure the absolute humidity in a gas stream, and i've found that water has an absorption peak at ~940-950nm

That peak is very weak in gaseous water, see Martin Chaplin's water pages on http://www.lsbu.ac.uk/water/vibrat.html
Even all the molecules in a whole atmosphere column reduce the solar intensity by only one half.

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