SwitchBot CO2 Detector, Air Quality Monitor Indoor, CO2 Monitor for CO2/TEMP/Humidity, Portable Carbon Dioxide Detector for Home/Car/Office/Greenhouse
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Availability:
In Stock.
Arrives
Tuesday, Aug 25
Size: Meter Pro CO2
Features
- 5-in-1 Multi-Functional Display Screen: SwitchBot Meter Pro CO2 features a 92-millimeter large screen that simultaneously displays CO2 levels, temperature & humidity, time, date, and comfort level. This indoor air quality monitor makes it easy to monitor your environment and decide when to ventilate for a healthier living space.
- High Precision Sensor: Built with Swiss-made NDIR sensors, this CO2 monitor accurately monitors air quality by measuring CO2 levels every 1 second with an accuracy of 50 ppm and a range of 400-9000 ppm. Its high sensitivity and stability ensure rapid and precise air quality feedback.
- 3 Alert Methods: Customize CO2, temperature, and humidity range with trigger alerts. When limits are exceeded, you'll be notified via sound audible alerts, visual screen alerts, and app notifications (SwitchBot Hub required). With this air quality monitor, you can continuously and effectively track air quality.
- Portable and Durable: Our air quality detector measures 92mm x 79mm x 25mm and weighs just 154g. It has a built-in battery with up to 12 months of life and a low battery warnings. Features wall-mount holes and an adjustable bracket for versatile placement in any environment.
- Sleek Design for Any Space: Featuring a modern, minimalist look, SwitchBot Meter Pro CO2 blends effortlessly into your living room, bedroom, or greenhouse. Also perfect for offices, gyms, classrooms, factories, or hotels, its versatile design ensures it fits seamlessly while keeping you informed about air quality.
Description
View all the information you want at once, making it easy for you to know when to ventilate home for a healthier environment. Our largest screen to date allows you to easily read different data from any angle and distance. Just press once on your device button to refresh data, mute, and switch between Fahrenheit/Celsius. Supports 38 days local storage and 2 years app storage. Export data with one click via our app. Comes with a wall mount and adjustable bracket. Can be hung or placed upright at 42° or 90°. Making it convenient for you to place around home. SwitchBot Meter Pro CO2 Meter Pro CO2 -MSS SwitchBot Meter Pro SwitchBot Outdoor Meter SwitchBot Meter Plus SwitchBot Meter
Brand: SwitchBot
Item dimensions L x W x H: 3.62 x 3.62 x 0.98 inches
Item Weight: 4.8 ounces
Measurement Accuracy: ± 1.8% RH, ± 0.2 ℃/0.36 ℉, ±(50 ppm + 5% of reading)
Measuring Range: 400 - 9000 ppm
Measurement Accuracy: ± 1.8% RH, ± 0.2 ℃/0.36 ℉, ±(50 ppm + 5% of reading)
Measuring Range: 400 - 9000 ppm
Mounting Type: Wall Mount
Output Type: Digital
Response Time: 1 seconds
Specific Uses For Product: home, office, gym, classroom, factory, hotel, greenhouse
Item Dimensions: 3.62 x 3.62 x 0.98 inches
Item Weight: 4.8 ounces
Brand Name: SwitchBot
Model: Meter Pro CO2
UPC: 810150542752
Number of Items: 1
Number of Packs: 1
Manufacturer: Wonderlabs
Unit Count: 1 Count
Included Components: Meter Pro CO2 Monitorx1, User Manual x1
Part Number: W3400010
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Aug 25
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: Meter Pro CO2
I tested it for accuracy and am very happy. I will now use and trust it. I got the best results exhaling on the right side. In the application push the refresh button next the carbon dioxide levels, and it will show the results usually in about thirty seconds or less. I started exhaling and then pushed the button. The longer you hold your breath before the test the more carbon dioxide will be shown on the monitor. I also tested it outside. I do not live in a city. The normal outdoor carbon dioxide levels should be approximately 400 to 450 parts per million. I don’t need to compare this monitor to any others. Because, the outdoor levels on earth are a known fact. Super happy this wasn’t junk. If I want notifications on my telephone, I need to buy their hub. It’s $50. But, I could be anywhere and get an alert for any of the various options available in the settings. Alerts are shown when you open the application. But, that’s too late for me. So, for now I have them turned off. / On battery power the lowest carbon dioxide check is every five minutes. But, you can push the refresh button in the application to instantly check. I like the application and the ability to monitor everything over time. I need that function. Scrolling over the graphs can be done on the graph, and below it, on the time. The instructions were helpful. Update: #1 The measurement of carbon dioxide stops randomly for several hours at a time, as mentioned by other reviewers. It will stay locked on a number, and in the application show the same number for several hours. This has happened several times. I have reset the device, I have recalibrated the device, and I have removed the device in the application, as well as reinstalling the application, several times. It will work fine briefly. Then just get stuck and show the same reading for several hours. Tips: The update interval can be changed while on battery power. To change the update interval for being plugging in, you have to plug it in. The temperature on the display does not change to Fahrenheit, regardless of changing it in the application. You have to go to the settings, under Top Button Function, and select "Pressing the top button will switch the temperature unit". Then press the top button once. The instruction manual says that if you do a calibration to do it on battery power. Also, it should be done outdoors. The carbon dioxide readings can be taken every five minutes on battery power and every one minute while plugged in. They can be taken more often while plugged in. But, that is not recommend. Due to possible heating up of the device. Which, may effect readings. The humidity and temperature can only refresh at the most, every five minutes. The application often does not show the latest readings, even after refreshing or closing and reopening. Usually, it will be behind by several minutes, and will eventually, randomly show the latest data. Also, after refreshing or opening the application it does not default to the latest readings on the graphs. So, every time you have to scroll for an unreasonable amount of time to get to the latest data. Plus, the scrolling and interaction of the graphs is glitchy and not consistent. I don't want to pay for the Aranet4. But, it appears to be the only choice for a small device like this, that functions correctly. AirGradient is a larger device. But, it has won awards and is accurate. That one is $230, and $138 if you assemble it yourself. Update: #2 The company reached out to me after my review. I am revising my review back to 5 stars. Because, even though everything I said before is true, the malfunction of the reading of carbon dioxide “freezing” or stopping and the unit not taking any measurements for hours randomly or forever, only happens while the unit is plugged in. While, on battery power I have had no problems. But, the carbon dioxide measurement frequency is limited to every five minutes on battery power. That is not a super big deal. Considering, that I also have an Aranet 4, and both units have the lowest possible measurement frequency for humidity at five minutes. Both units are in basic contexts exactly the same. A few numbers here and there is nothing. Plus, the units often match nearly identically. But, for graphs and checking over hours, days and weeks, they are for the most part, the same. Not any jumps, or differences like that. I would prefer the carbon dioxide to be measured every minute. In the Switch Bot application, while in battery power it even offers to go more frequent in the measurements, down to seconds. Though it recommends against it due to possible heat that may affect readings. For less than half of the price of the Aranet 4 and basically near equal performance, I think this is a good option. I do not however know about the longevity of the product. But, customer service was great. No questions asked. Money back. I did just discover the situation about the unit only working for me consistently on battery power after they contacted me. So, I waited for the money to clear before writing this update. I get to keep the unit. I like it. Mine, just was not working correctly while plugged in. I think it’s personal preference and how much you want to spend. In my opinion there is basically zero difference between this Switch Bot and the Aranet 4. The Aranet 4 is smaller, and on battery power can measure carbon dioxide once a minute. But, that is not big factor for many. Still, important for some. My plan was to use a little external battery pack to get the one minute readings. But, in general most people don’t need readings every minute. I don’t. So, super happy. Thank you, Switch Bot. Update: #3 Showing a comparison of three devices. One only tests humidity and temperature. The white background photographs are the Aranet 4. The Aranet 4 is the best application by far. It can go in landscape and can be zoomed-in on. The examples show the accuracy of the device with humidity and carbon dioxide. Also, the zooming-in is a nice feature. But, it is not necessary and not very relevant to many. The tracking over time is basically the same as the Aranet 4, and that device is a lot more. The nicer application of the Aranet 4 is great. But, I don’t know if it’s worth 3 times the price of the Switch Bot. Zero problems for me when running on battery power. No “freezes” of monitoring in a week. Plugged-in I would get random “freezes” any day or night, for hours or forever. A different Switch Bot may be fine. I personally would buy the one with the best application if I was rich. I’m not. The application is the reason why I bought this device and it does what I need well enough. To monitor trends, changes over time, and to reference anything back to the data in the graphs.
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Reviewed in the United States on September 3, 2025 by oartalk
Size: Meter Pro CO2
Excellent design and functionality. Simple device with optional smart functionality. Absolutely necessary device for ensuring adequate ventilation of home, many people overlook poor air quality and it really makes you feel and perform worse. Its accuracy aligns with Xiaomi CO2 detector with digital display that I also tried, with 50-100 ppm deviation, meaning devices are working properly. Sensor needs to be cleaned occasionally to show accurate CO2 concentration. Device doesn't emit any sound and is very battery efficient running on AA batteries. Once figuring out proper ventilation setup, you won't be needing to watch at it constantly. Logoless, minimalistic and smooth design that would fit any place, plus readable display. Very well engineered device, yet cable feels cheap, using batteries is recommended. Smart functionality is thoroughly designed, but I found myself not using it after setup. Wish there were dark color options like Space Gray or Matte Black that would fit darker spaces.
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Reviewed in the United States on May 20, 2026 by Vlad
Size: Meter Pro CO2
Just got this and seems to be very accurate. Super easy to use and works well with the app. The app and the device connected very easy and the display is easy to read.
Reviewed in the United States on April 11, 2026 by C Z
Size: Meter Pro CO2
Great monitor, ease of set up, perfect size for mounting on my wall. The screen shows everything relevant to what I need with a display big enough to read from anywhere inside the van. I haven't need to change the battery yet but I've only had it for a month or so. The app was straightforward and easy to connect to. Shows and keeps a log of the highs and lows which is always interesting. I trust the accuracy as it alarms me to crack a window when I forget.
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Reviewed in the United States on July 6, 2026 by Kin
Size: Meter Pro CO2
I bought this thing to monitor co2 levels, and from all accounts they use a good sensor, I have another switchbot product and thought I'd just stick with this rather than having to download another app. It ran ok for the first few days but yesterday around 2pm it got stuck at a co2 reading. I noticed the levels had not changed much since waking up and in a stuffy house should have been higher. I opened all the doors and vented the house with my whole house fan and the levels didn't change. I unplugged it and popped a battery out and it reset. Apparently this is a known issue and switchbot hasn't gotten around to fixing it yet and it's a firmware issue or hardware issue, so not specific to only one of these devices. So far it's happened just once and it's tanked the rating since I don't know if I can trust it. I'm very disappointed in this product so far but I will update later if it redeems itself. So overall the device is acceptable build quality wise and works within the app, but the firmware feels like beta software of it can't resolve issues without me physically unplugging it. I would say the value for the money on this particular product is quite low.
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Reviewed in the United States on August 21, 2025 by Rizzo
Size: Meter Pro CO2
I purchased this to start monitoring CO₂ in a bedroom and office area with less-than-optimal fresh air supply, and it gave me a lot of information to start working to improve airflow and air quality in my home. The SwitchBot app is mediocre and sometimes frustrating to use, and I did not have success in connecting it with Home Assistant, which was one of my initial intentions with this purchase. I've since found out that this SwitchBot product is measuring CO₂-equivalent, and not using a dedicated CO₂ sensor, which is fine for approximate relative changes, but not an accurate measurement. For the ~$50 I spent on this, it was useful and helpful in understanding how to improve air quality in my home, however I'd recommend different products if you want a more accurate measurement, and more flexibility in connecting to Home Assistant for automations and alerts.
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Reviewed in the United States on December 2, 2025 by AC
Size: Meter Pro CO2
Zero exaggeration but this device is amazing. Stumbled upon my house CO2 issue accidentally upon purchasing a BP04 for large TV room. That purifier unit has CO2 monitor that was reading dangerously high levels. Put the Switchbot CO2 monitor next to it and there was 0.61% difference between both readings being 1140 and 1147 respectively. Strongly recommend to purchase. I shared with coworkers after seeing how bad my indoor CO2 levels were. Pros: Extremely easy to use. Clear display. Has caching capabilities when used without a hub. Bluetooth can transmit between floors. Cons: Cannot think of any. This is one of the very few products I have purchased that did exactly what it was intended to do, extremely well, and without any possible improvements.
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Reviewed in the United States on December 6, 2025 by JP
Size: Meter Pro CO2
Works within switchbot, but doesn't currently expose the CO2 levels over Matter. It seems that the Switchbot hub doesn't impliment the right matter protocols to expose CO2, so you'll only see the CO2 levels in switchbot itself. Also one should be aware you can only have 4 "secondary devices" (like this meter) exposed over matter per hub, which will force you to get more hubs if you have more than 4 devices you want to expose over matter.
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Reviewed in the United States on February 18, 2026 by Cody