Interpretation of values

Sensirion / gas-index-algorithm

Sensirion's Gas Index Algorithm provides a VOC and NOx Index output signal calculated from the SGP40/41 raw signals

https://sensirion.github.io/gas-index-algorithm/

BSD 3-Clause "New" or "Revised" License

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Interpretation of values #13

Open ds-digid opened 3 months ago

ds-digid commented 3 months ago

Finally I got my Testdevice running with a SGP41 sensor.

But I am curious about the computed values. What does a calculated NOx value mean? Is there any documentation about the output value and the air quality other than "higher values are bad?"

Found the information: https://sensirion.com/media/documents/9F289B95/6294DFFC/Info_Note_NOx_Index.pdf

It would be nice if there where some more hints to this in the docs.

sdmueller commented 3 months ago

Hi @ds-digid

I'm glad you found the note about the NOx Index. There is also a (very similar) note about the VOC Index here: https://sensirion.com/media/documents/02232963/6294E043/Info_Note_VOC_Index.pdf

Thanks for bringing this up. I agree that it would make sense to add the links to the readme.