<story><title>AirGradient Open Source Air Quality Monitor for CO2 and PM2.5 Measurements</title><url>https://www.airgradient.com/open-airgradient/instructions/diy-pro-v37/</url></story><parent_chain><item><author>NikolaNovak</author><text>Open source diy is wonderful. But is there a reliable trustworthy monitor that can just... Be bought? A box that will reliably tell me what&amp;#x27;s the carbon dioxide carbon monoxide dust allergens volatile compounds? Am I possibly being greedy and I need several konitors (I wouldn&amp;#x27;t have an issue with that)?&lt;p&gt;Every review I check for any consumer accessible device seems to indicate they&amp;#x27;re inaccurate, miscalibrated, or downright deceptive :-(</text></item></parent_chain><comment><author>daniel_iversen</author><text>I got the uHoo Air Quality Monitor[1] and I love it. One of the few nice smart-home&amp;#x2F;app ones to monitor carbon monoxide too. But it&amp;#x27;s pricey. I can probably get some discount codes from them if the HN community is interested (I&amp;#x27;ve spoken with their team once before in Singapore and they were very nice and accommodating!)&lt;p&gt;[1] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;getuhoo.com&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;getuhoo.com&amp;#x2F;&lt;/a&gt;</text></comment>
<story><title>AirGradient Open Source Air Quality Monitor for CO2 and PM2.5 Measurements</title><url>https://www.airgradient.com/open-airgradient/instructions/diy-pro-v37/</url></story><parent_chain><item><author>NikolaNovak</author><text>Open source diy is wonderful. But is there a reliable trustworthy monitor that can just... Be bought? A box that will reliably tell me what&amp;#x27;s the carbon dioxide carbon monoxide dust allergens volatile compounds? Am I possibly being greedy and I need several konitors (I wouldn&amp;#x27;t have an issue with that)?&lt;p&gt;Every review I check for any consumer accessible device seems to indicate they&amp;#x27;re inaccurate, miscalibrated, or downright deceptive :-(</text></item></parent_chain><comment><author>karmelapple</author><text>The Aranet has worked well for me, and I think is calibrated well and works smoothly. It’s not the cheapest though, but I haven’t recharged it in over a year… almost two years now!&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;a.co&amp;#x2F;d&amp;#x2F;9o1Qvzb&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;a.co&amp;#x2F;d&amp;#x2F;9o1Qvzb&lt;/a&gt;</text></comment>