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๐ฌ๏ธ Breathe smarter, live better โ your airโs new best friend!
The INKBIRDPLUS 6-in-1 Indoor Air Quality Monitor (PTH-9A) delivers precise real-time tracking of CO2, particulate matter (PM2.5 & PM10), AQI, temperature, and humidity. Featuring a vivid color LED display, a 3-stage AQI alert system with sound, and easy USB-C charging, itโs designed for versatile use in homes, offices, grow tents, and more. Its smart auto-calibration and portable design make it an essential tool for anyone serious about indoor air quality.




















| Customer Reviews | 4.0 out of 5 stars 281 Reviews |
T**S
Always good to monitor your air quality
Iโve been using this air quality monitor mainly to keep an eye on air quality while 3D printing, and itโs 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. Itโs nice having actual data instead of just guessing if the airโs 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!
M**A
Very nice, works as advertised
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.
H**Y
Useful and apparently accurate
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.
O**O
Excellent Air Quality Monitor - Accurate & Easy to Use
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!
V**D
Horrible. Looks great. Useless
As soon as I got it out of the box, i plugged it in to charge. After 24 hrs of charging, the battery was only showing 50% charge. Then I started to set it up. I've tried to input the time and day and it wouldn't accept the minutes. I then noticed the battery indicator showing 100%. I continued trying to figure out the time setup and noticed again the battery indicator back at 50%. Then the display got dimmed by itself. Then it brighten again. Cleary this had all sorts of malfunctions. USELESS PIECE OF GARBAGE.
H**.
Battery drains quickly.
Nice device but after fully charging, the battery lasted less than 24 hours. This basically means it has to remain plugged in all the time. I did not see this stated in the product description.
C**D
Great little device
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 itโs convenient to bring when we travel too.
J**N
Nice design and well made
I've been using this in my home for a couple of weeks and it works very well for me. We have our windows open almost every day and I bought this to see how the air quality is when we have nearby wildfires. Luckily there haven't been any this year but when it does happen I will update my review. So far I have noticed that the AQI and ppm readings are low at night and go up as the wind picks up during the day. On the rare days we close the windows to run AC, the CO2 readings are higher. The screen is clear and has nice colors. There is an alarm function to alert you to poor air quality. It has an internal battery which seems to run the device for about day but it is designed to be plugged in most of the time.
M**L
As advertised!
Accurate, very useful, especially the alarm function when air quality drops rapidly.
J**G
Battery dies within a month
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.
H**S
A vital device to see what our eyes cant see
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
M**I
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A**R
Does not charge properly
The charger does not work at all well! I have replaced 2 and neither would charge properly. Since one cannot use batteries, charging is the only way to use it. Finally the price is far too high for something that does not work well!!
Trustpilot
2 weeks ago
3 days ago