qingpingAir Monitor Lite, Apple HomeKit Compatible Wi-Fi Indoor Air Quality Meter, Detects PM2.5, PM10, CO2, Temperature and Humidity

If Apple made Air Quality monitor, this would be it.It's really pretty, looks great in the room, it's easy to read with large, bright display and easy to understand thanks to LED indicator light which goes from blue through green, orange, red and purple.Display and HomeKit data refresh every second. It may not seem like much of importance, but presumably you need this to monitor air in your home and to help you develop good habits, like opening a window once in a while etc. Well there's nothing more satisfying like watching CO2 level going down in a real time after doing so.Device has build-in battery but only for about 6 hours of operation, so it's not really a 100% wireless device, you de facto want to keep it plugged in. It has a little fan inside to suck air in and out for sampling, which is quite rare in similar devices. Fan is extremely quiet and I can't hear it, even though I have one of those devices right next to my bed.The QingPing+ app is easy to use, looks good and shows data for the past 24 hours in 15-minute blocks as well as max and min values for each of the last 30 days. You can also download 15-minute data for the past 60 days within the app.It would be nice if the device allowed for more than one value to be displayed at the time (I was told by the developer that this is in works) as well as to allow for LED indicator to display different metric from the main display (for example light to indicate CO2 levels, but display to show temperature). I also noticed slight discrepancy in temperature and humidity readings with another similar devices, but can't really tell with 100% which one is more accurate. Would be nice to have offset option for those readings. CO2 levels seem to be on pair within small margin with Netatmo air monitor, so I believe they're being accurate.Good:- looks great- HomeKit compatible- frequent data readBad- only single metric on the screen at the time- no way to calibrate/offset temperature or humidity- LED indicator shows level of metric displayed on the screen: there's no way to separate the two to indicate different metrics- temperature threshold somewhat surprising: anything below 23 C is considered "slightly low".

This air quality monitor has a nice design and seems to be good quality, the software experience and integration with apple homekit is pretty good too, it's also accurate on everything but temperature (where it thinks it's usually hotter than it is, or the app says that 21c is too cold)I keep it plugged in most of the time but the battery life seems to be decent too even having it not turn off at all, obviously you can extend it's life by making it automatically turn off after a while on battery if you don't need or want to constant measure.

Got very close to sending this back. At arrival, it constantly disconnected from my HomeKit network but after a firmware update (itself a little problematic, it claimed it had failed but actually hadn't) it has been very reliable since.You will likely need to calibrate the sensor results, out of the box it over-read the temperature by a few C. It also shows a different CO2 result from an air conditioning unit controller I have in the same room, no idea which (if any) is right!?But it's compact, looks nice, has the option to automatically scroll through the sensors and is quick to show when pollutants are building up, with a nice green/amber/red bar above the read out.I ended up using the manufacturer's App. It's reliable and has both real time and a historical chart view.

There is a known problem with these Qingping air monitors with the fan going bad after a couple of years. The latest version of their larger air monitor has a replaceable sensor, which partly solves the problem.It's a great little monitor, integrating with HomeKit and working well while the fan is okay, and you could argue that having to replace it every 1-2 years isn't too expensive given there's not a better alternative.

Happy with its form, performance and reliability so far after 2 months use. I primarily bought it to see the affect of our woodburning stove. In our "real world" test INDOORS PM2.5 tended to go DOWN when using the stove, whereas when pan-searing chicken in the kitchin PM2.5 doubled, lighting a few candles made it double too, while blowing them out made the device rise 20-fold a few minutes later. As expected when using the device OUTSIDE we measured a rise in PM2.5 downwind of our stove's chimey.PROSAccurate PM2.5 and CO2 (according to both personal tests & official ones). The latter can be easily recalibrated in the Qingping app if needed.CONSTemperature is always 2°C too high and is slow to react (like if you take it outside on a cold day). But in the Qingping app you can offset the readings if you so wish). However, I bought it for its PM2.5 and CO2 readings so rarely use the temperature or humidity readings.When taking it away from the home WI-FI it doesn’t always reconnect when returning home so on a few occasions I had to delete the monitor in the Qingping app and then re-add.NB. If the unit turns off while unplugged then it might be due to the ‘Auto Off While Using Battery’ setting being on something low like 30 minutes within the Qingping app, rather than you thinking it’s actually a poor battery.

The idea and use of all the different sensors is good BUT the accuracy makes it useless.However I have this beside a thermometer, Eve Home and Netatmo Home Coach and the temperature reading started as 2deg C lower than all of these.I then tried to upgrade the firmware as suggested in other reviews which said that this would fix the issue, However the app refused to download the firmware. However the firmware eventually upgraded itself. However it dod not fix the issue, the monitor now shows the temperature as 2 deg C HIGHER than the others. The Co2 and humidity sensors are also off