Air Quality Monitors for VOCs

[Ethan]

I appreciate this is an old post, but I think anyone wondering about how learning offsets impact VOC measurements may find this useful:

Understanding VOC Index: What Happens When You Change the Learning Period

If you’ve ever looked at a VOC reading on an air quality monitor and wondered why it shows an index number instead of a concentration, you’re not alone. Most consumer air quality monitors on the market (including those powered by sensors from Sensirion and Bosch, which between them supply the vast majority of the industry) report VOC as an index rather than an absolute value. It’s a source of regular confusion, and if you want to understand why indexes are used in the first place, I’ve written a…