Unfortunately, yes. And I wouldn't trust the uHoo marketing claims about their sensor even one bit. I found another testing table if you'd like to take a look:

Unfortunately, yes. And I wouldn't trust the uHoo marketing claims about their sensor even one bit. I found another testing table if you'd like to take a look: https://www.cabq.gov/airquality/documents/research-on-availablity-and-reliability-of-low-cost-air-quality-monitors_4-15-21.pdf https://www.cabq.gov/airquality/documents/research-on-availa...