5 ms·

Is this an ad?

• blacksmith_tb 10y ago
  Especially when there are very similar [1] devices selling in China for about 1/3 the price (where bad air quality is more than what you cooked for breakfast). 1: http://www.originstech.com/ http://www.originstech.com/
• reefoctopus 10y ago
  It certainly reads like one.
• xiphias 10y ago
  Yes, and these cheap devices sadly don't have accuracy description. I would be OK to pay for it if some accuracy would be guaranteed, but writing that it's calibrated and not specifying the maximal error looks always fishy.
  • robryk 10y ago
    I would also be wary of how the accuracy declines over time. E.g. how does the device keep properly sized dust from staying or small scratches from developing on the surfaces that are involved in the measurement (e.g. lenses and mirrors for optical devices)?