<story><title>Air Quality Monitors from USD $169 to $6k use the same low-cost PM Modules</title><url>https://www.airgradient.com/blog/most-aq-monitors-use-same-pm-modules/</url></story><parent_chain></parent_chain><comment><author>emmanuel_1234</author><text>This reads like a disguised ad for AirGradient, which pops up here every now and then. I fell for it because it claimed to be &amp;quot;open&amp;quot;. Well, although it is definitely more &amp;quot;open&amp;quot; than most, it feels like an afterthought.&lt;p&gt;See for example this: &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;forum.airgradient.com&amp;#x2F;t&amp;#x2F;airgradient-diy-pro-pcb-3-7-2-4-1-2023-04-13-source-code-sketch&amp;#x2F;927&amp;#x2F;13&quot; rel=&quot;nofollow noreferrer&quot;&gt;https:&amp;#x2F;&amp;#x2F;forum.airgradient.com&amp;#x2F;t&amp;#x2F;airgradient-diy-pro-pcb-3-7-...&lt;/a&gt;, linked to a Github issue opened in June.&lt;p&gt;Somehow, the source code for the new version has been overwritten by an older (CC-BY-NC) version, yet the issue has been left to rot, both on the support forum and on Github, letting me to think that the &amp;quot;openness&amp;quot; is mostly a posture to lure the HN crowd. Additionally, the -NC clause is definitely a deal breaker, and I should have investigated further before giving them my money.&lt;p&gt;(it sucks to air it out in public here, but apparently the AirGradient folks don&amp;#x27;t care much about issues raised on their own forum).</text></comment>
<story><title>Air Quality Monitors from USD $169 to $6k use the same low-cost PM Modules</title><url>https://www.airgradient.com/blog/most-aq-monitors-use-same-pm-modules/</url></story><parent_chain></parent_chain><comment><author>an_account</author><text>I’ve gone down the air quality monitor rabbit hole and, after building my own, have settle on just buying&amp;#x2F;recommending the Awair Element.[1]&lt;p&gt;Interestingly, it’s not in the table in this article.&lt;p&gt;[1] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.getawair.com&amp;#x2F;products&amp;#x2F;element&quot; rel=&quot;nofollow noreferrer&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.getawair.com&amp;#x2F;products&amp;#x2F;element&lt;/a&gt;</text></comment>