<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>SrslyJosh</author><text>I have an Awair sensor, and I can confirm that the VOC sensor is able to detect...well, pretty much anything from food to hair products to outgassing from some new thing that I opened up and accidentally left too close to the sensor.</text><parent_chain><item><author>jeffreygoesto</author><text>Relative VOC measurements at least are able to detect a no. 2 in nappies. Great to distinguish if you should go in and change them or would be a distraction from falling to sleep when checking. I bulit a Pi ZeroW that measures on the side of the bed and publishes a curve of the last hour of the values. You can see a pretty salient drop when &amp;quot;it&amp;quot; happens.</text></item></parent_chain></comment><story><title>Many indoor air quality sensor products are a scam</title><url>https://halestrom.net/darksleep/blog/048_indoorairsensing/</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>clairity</author><text>yah, i think a lot of these IAQ (indoor air quality) products are ok at relative differences (which is mostly what lay consumers care about). the article mainly points out that they&amp;#x27;re not good at absolute measurements, and for something like VOCs, it&amp;#x27;s likely using a CO₂ sensor and a lookup table that&amp;#x27;s static and only really valid for the test room it was created in.</text><parent_chain><item><author>jeffreygoesto</author><text>Relative VOC measurements at least are able to detect a no. 2 in nappies. Great to distinguish if you should go in and change them or would be a distraction from falling to sleep when checking. I bulit a Pi ZeroW that measures on the side of the bed and publishes a curve of the last hour of the values. You can see a pretty salient drop when &amp;quot;it&amp;quot; happens.</text></item></parent_chain></comment><story><title>Many indoor air quality sensor products are a scam</title><url>https://halestrom.net/darksleep/blog/048_indoorairsensing/</url></story>