Temtop Air Quality Monitor Professional PM2.5 PM10 Formaldehyde Temperature and Humidity TVOC AQI Tester Indoor Outdoor Air Pollution Detector w/ Data Export (LKC1000S+ 2nd)

Great product easy to use worth the money

I've put this thing in a new cheap smelly drawer, and level of formaldehyde didn't change. I've put this thing in a dusty place, no change in pmX numbers. It measures temperature though, but too expensive to measure just temperature

I have a FLIR moisture meter that I trust much more than this toy to compare measurements on temperature and humidity levels and the Temtop meter is consistently off by 10% or more. I can only assume that the other measurements are off as well. I’ll be returning this because it is not worth the price paid for being so inaccurate.

Inaccurate sensor. I get a reading of 43 AQI when it is actually 3. Background: Per the instructions, I placed the monitor in a well-ventilated place (outside) for 8+hours while off. The sensor apparently needs to be clear of the offgassing from packaging materials. I did the same thing with the machine off but plugged in so the fan continued to run. Sensor still reads about 43 when the actual AQI is 3. I contacted customer support but may be returning the unit.