Air Quality Monitor Indoor air Quality Monitor for Cars,Home,Office,Hotel etc (PM2.5,AQI)

Very nice little toy to measure your indoor air quality. I have nothing to compare with, but the numbers look pretty accurate to me.

I have a professional quality AQ monitor and this one compares very well in terms of the accuracy of the PM2.5 reading. The response time is good. Very cool to see the number of particles in each size range.With no internal battery, moving the unit from room-to-room is not convenient. The open framework case, while cool to look at, means you need to blow the dust off regularly.

Unit displayed low numbers in the 4 to 1 range for PM2.5 so I immediately knew something was off...Let the unit 'settle' for about 10 minutes...then particulate readings were 0...also noticed the fan stopped working and smelled burned.I immediately ordered another unit and started the return process on this one...will update review when I receive new unit. As other reviewers have also had bad luck, these seem fragile. We'll see, but off to a not so good start!

Air quality ratings in my area spiked yesterday but unit continues to display zero particulate. I dripped a pinch of baby powder near the unit but the '0' readings don't change. This may be a 1-off bad unit so I'll re-order and update review later.

I bought one of these based on a YouTube video because it looked pretty accurate and offered a lot for the price. However after receiving two units I can safely say the accuracy of these is definitely hit or miss. Unfortunately the two I received were wildly inaccurate and couldn't even agree with each other. With no way to calibrate them they are useless to me and are being returned. For about $20 more I found another brand that offered better out of the box accuracy, and wifi connectivity allowing the use of an app to track data trends, calibrate all of the sensors, and receive alerts if you'd like. I think with some tweaks this unit could be very good, but in its present state I can't recommend it.