6-in-1 Indoor Air Quality Monitor, Detects CO2, PM2.5, PM10, AQI, Temperature and Humidity with Alarm, for Rooms, Cellars, Grow Tents, Offices, etc. (PTH-9A)

Wow this thing is great. Shows all kinds of graphics for the air quality and temps and humidity for my house. Wife has been concerned about the air quality in general and this gives us more reassurance. No cords or anything necessary since it runs on a rechargeable batter that lasts a while. Great value for the cost and it’s convenient to bring when we travel too.

I’ve been using this air quality monitor mainly to keep an eye on air quality while 3D printing, and it’s been really solid so far. Setup was quick, basically turn on and good to go. and the display is bright, clear, and easy to read from across the room. It tracks CO2, PM2.5, PM10, and overall AQI, which is super helpful to see how things change during and after a print. The readings seem accurate and respond quickly when the printer starts running or when I open a window for ventilation. It’s nice having actual data instead of just guessing if the air’s getting stuffy or dusty. For anyone doing a lot of 3D printing or working in a small workshop, this little monitor gives some good peace of mind. Big plus it has USB-C charging port!

This seems to be a useful and accurate tool, and I especially appreciate the CO2 monitoring. I find myself opening a window more often when the level is high. I run my air purifier less often -- only when the particulate level rises. I have no idea how accurate it is, but it is responsive, for example, to ordinary cooking fumes or burning incense. It's fairly easy to set up, and I recommend calibrating the CO2 level manually, as the instructions suggest.

I had such high hopes for this product.. and with the reviews that I read before I thought this is a pretty good one. It didn't even last 30 days before it just stopped turning on. Tried to charge it. Tried to charge it with different cords. It just will not turn back on. I do not recommend this product

I'm very impressed with this air quality monitor. First of all it feels like it's very high quality. It does not feel or look cheap. I can tell a lot of thought went into the design. Setup was basically one button and it was ready to go, already fully charged. The display is straightforward and very crisp, bright, and easy to use. It's also accurate and the reading update instantly real time. The alarm feature is also a big plus because I put this in my garage man cave and I'll still be able to hear the alarm from other parts of the house. I also love how portable it is and how you can hand it on a wall. I highly recommend this!

This air quality monitor works well, with nice clear and bright display. And the readings are very close to my IQAir AirVisual and AirGradient monitors. Very simple to setup and calibrates CO2 easily. Great for any room in the house to display air quality. Reasonable price and I purchased two of them. I've been through a few air quality monitors and InkBird has been a real good and accurate product. Plus, InkBird support responds quickly for any questions or technical issues.

I bought this product after seeing a review on it in Consumer Reports. After unboxing, I charged the device fully & within 24 hours, the battery was fully dead. Thinking it might be a fluke, I charged the device fully again, & again the battery was dead within 24 hours. Outside of the battery life, which is a huge disappointment, the device works well.

Easy to setup, live monitoring updates frequently and seems very accurate. I’m impressed with how small the unit is, very cool.

I tested it by blowing some smoke, put it inside, outside... It seems to work perfectly

Battery died within a month. The fact that this item got a 3.8 star average review is telling. Most reviewers give a big benefit of the doubt so average review is usually above 4.5. That said, everything else I bought from Inkbird (sous vide, thermometers) are perfect.

why did i buy this: i do a lot of WFH and realized i get too tired and exhausted after just a hour. Dk why i bought this and found out that CO2 accumulation was way outta normal levels in my room due to poor ventilation. now i remedied the CO2 issue and also found out that my DIY air purifier works really well. normal AQI is around 70-80 normally in my region. Features and good experience with this product : built in battery lasts for a day but this device is designed to be connected to power at all times. CO2 measurement can be calibrated and is set to off by default built like a brick which i honestly did not expect measurements respond pretty fast to changes which i really appreciate. has a smoke alarm kinda feature where if AQI crosses 100 it beeps. looks nice in my room. The cons and bad experience. backlight is not bright enough experienced a glitch where CO2 ppm was stuck at 500 had to reset the device i wish it lasted atleast for months before charging if there is bad ventilation temperature reading is unreliable Something i want to say: i read a lot of reviews before buying this product and it seems like the seller is listening to feedback and fixing a lot of issues users experienced my experience till date is almost flawless except the problems mentioned above. which is also something i didnt expect. i expect this thing to last atleast 3 years or so and if it fails i will update my review as this one is not cheap at all atleast for me. overall i can confidently recommend this product if you can accept the shortcomings mentioned above

Temperature and Humidity meters don't work and battery does not last long.

It was working fine for one day (showing value of 40 indoors), afterwards it shows a reading below 5 all the time even in highly polluted areas. The AQI reading is still incorrect after fully charging.