Tech & Gadgets

This new air monitor had some surprisingly bad news about my indoor air quality

A SwitchBot Meter Pro with a finger touching the top. A SwitchBot Meter Pro with a finger touching the top.

SwitchBot’s air quality monitor is the cheapest way we’ve found to monitor the air quality in your home.

SwitchBot

We carefully curate lists of the best carbon monoxide detectors, air purifiers, and dehumidifiers to help your home. But many homeowners have one question first: what is my air quality?

It’s hard to tell if there’s too much carbon dioxide in the air or if your home is suffering from a moisture problem (or lack thereof) until things get really bad. So how do you find out if your air needs help?

SwitchBot has one of the most affordable standalone air quality monitors I’ve seen. While many security systems include air quality monitoring add-ons, they are part of a larger, more expensive package. You can use SwitchBot’s monitor without any additional purchases (adding a mini hub is optional for more app features), move it to any room in your home, and choose how often it updates. Best of all, you can find it for only about $50.

When I tested the Meter Pro with CO2 monitoring, I discovered some surprises when it came to air quality in my own home, discovered what the app can do and was surprised by how easy the smart meter was to use.

A smart air quality monitor for every place in the house

A man wearing headphones uses a phone while a smart speaker gives an air quality alert. A man wearing headphones uses a phone while a smart speaker gives an air quality alert.

The SwitchBot Meter Pro works well alone or with other smart devices.

SwitchBot

Switchbot’s Meter Pro with carbon dioxide monitoring can work indoors or outdoors (or both with the right add-on), but the carbon dioxide feature makes it a much better option for indoors. You can also move it to specific areas where you fear carbon dioxide levels will be higher. The monitor works by displaying parts per million, a commonly used method to measure carbon dioxide particles in the air, and updates itself regularly. There’s a Swiss NDIR monitoring sensor inside, and it proved to be very accurate in my testing.

If you use the standalone device, you can easily set it up. I took the meter out of the box, pulled out the battery tab to activate the battery and it immediately started showing the air quality in the area.

You’ll notice in my photos that the temperature is shown in Celsius by default, but that’s not a problem. With a small button at the top of the meter I can instantly switch between Celsius and Fahrenheit. The hardest part was deciding where to put it.

Understanding air quality figures

A SwitchBot Meter Pro sitting on a black desk. A SwitchBot Meter Pro sitting on a black desk.

SwitchBot’s Meter Pro gives you all the details about the air quality in your room.

Tyler Lacoma/CNET

During testing, I frequently moved the SwitchBot Meter Pro and placed it on different counters and tables to see how it changed. I quickly discovered that the carbon dioxide levels in my home were close to the maximum acceptable level – anything above 1,000 ppm, and it was time to consider making changes such as increasing ventilation or air purification. That’s where our lab-tested recommendations can shine.

The high figures were not entirely surprising. When I tested, we were at the end of smoking season here on the West Coast and the air outside was still relatively smoky, something that has a big impact on carbon dioxide levels, even indoors. Additionally, my home uses natural gas for both heating the fireplace and cooking, another factor that increases carbon dioxide numbers.

As the regional fires subsided, the air quality in my home improved significantly, with ppm dropping to 600 to 700 ppm. In some other homes where I took it for a quick test, it was even better, indicating that there may still be work to be done to improve air quality.

In addition to temperature and carbon dioxide levels, the meter monitors humidity (my range in the high desert was pleasantly comfortable during the wetter fall season) and shows you the current weather. That makes it a nice hub for a quick view of what’s going into your lungs.

Add a mini hub for more control and better battery life

SwitchBot's app shows a variety of sky and weather conditions. SwitchBot's app shows a variety of sky and weather conditions.

SwitchBot’s app offers a plethora of information.

Connecting the app via Bluetooth opened up a world of possibilities – well, once I created an account and applied numerous firmware updates anyway.

Using the app I was able to adjust how often the meter updates to save battery life. The battery lasts about 12 months and charges via USB-C, so it’s not a big deal. But I found that by increasing the frequency of updates, I could more easily test air quality without any noticeable drawbacks.

You can use the Meter Pro as is, but it gets a significant functionality boost the SwitchBot Hub Mini ($40). My model came with one, so I was able to set it up and connect to the SwitchBot app. That enabled some of the more advanced features like notifications and remote monitoring, so it’s a quality of life improvement if you want to spend a little more.

The hub also allows you to set alerts through the app, through notifications or with sound alarms, based on triggers such as when temperature, humidity or parts per million reach certain levels. It also allows you to do things like low temperature alerts in rooms (or garages) that are far from your thermostat, so you know when they might need extra heating.

Dive into air quality statistics, customization and more

SwitchBot's app shows settings that can be adjusted. SwitchBot's app shows settings that can be adjusted.

SwitchBot’s preferences allow many readout adjustments.

Tyler Lacoma/CNET

The SwitchBot app isn’t quite ready yet. As I discovered, you can view the local dew point and vapor pressure deficit, as well as get weather forecasts if you’re willing to give your address to the app. The app also includes a history graph so you can see patterns over time.

If we delve deeper into the settings, even more options will emerge. You can recalibrate the temperature and humidity settings if they seem a little off for your climate, then manually adjust your idea of ​​a “comfort level” to monitor when the monitor warns of a problem.

The Hub Mini also offers compatibility with common voice assistants, such as Amazon Alexa. This allows you to set up automations with other Alexa-enabled devices, such as a smart thermostat or even a humidifier.

While the app mentions the ability to store your long-term air quality data in the cloud for a fee, this is absolutely not necessary if you’re just using the Meter Pro, so subscriptions aren’t an issue for this monitor.

An air quality monitor for every home

SwitchBot’s Meter Pro with carbon dioxide monitoring is compact, highly portable, and accurately measures air conditions in every part of your home with its Swiss sensor. Add to that the current low cost of $50 to $60 and it’s an ideal monitoring solution for anyone who isn’t sure what the air is like in their home and wants to keep an eye on air quality this winter.

One final note: If you are interested in purchasing this air quality monitor, make sure you opt for the carbon dioxide monitoring option. SwitchBot has a comparable Meter Pro that does everything except monitor carbon dioxide levels. The new version with CO2 monitoring is a much better package, even with the higher price.

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