When HN users recommended it
1 HN user recommended this in 2016, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
1 HN user recommended this in 2016, in one comment.
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
Reasonable lower priced option from china:
https://www.amazon.com/UNI-T-UT938C-Detector-Thermometer-Tem...
or slightly lower priced slightly older version on eBay
http://www.ebay.com/itm/UNI-T-UT-338C-Indoor-VOC-PM2-5-Air-Q...