Smart home tech, weighed fairly.

The 10 Best Smart Air Quality Monitors

Wi-Fi monitors for PM2.5, CO2, VOCs, and radon, ranked from live Amazon data.

We pulled the smart indoor air quality monitors selling on Amazon and scored them on rating, review volume, and features: real NDIR CO2 sensors, PM2.5, radon, and smart home support.

Prices, ratings, and review counts captured from Amazon on 2026-10-04.

Our picks

Best Overall GoveeLife Smart Air Quality Monitor CO2 Detector H5140, Display & Alarm
GoveeLife
GoveeLife H5140 CO2 monitor
4.5 (235)

A real NDIR CO2 sensor, a display with an alarm, and Alexa and Google, rated 4.5 stars.

$69.99
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Best for Alexa Amazon Smart Air Quality Monitor, Detects temperature, humidity, carbon monoxide, PM2.5 and VOCs, Get notifications when air quality drops, Works with Alexa
Amazon
Amazon Smart Air Quality Monitor
4.2 (5,547)

PM2.5, VOCs, and CO in the Alexa app with routine triggers, for $46.99.

$46.99
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Best for Matter SONOFF AirGuard CO2 SAWF-08P, Smart Indoor Air Quality Monitor, Matter Compatible, 2.4GHz WiFi, CO2 Monitor for CO2/Temp/Humidity, Real-Time Display & Notification, for Bedroom, Nusery Room
SONOFF
SONOFF AirGuard CO2 SAWF-08P
4.4 (173)

An NDIR CO2 monitor that works with Apple Home, Google, Alexa, SmartThings, and Home Assistant.

$49.90
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Best With Radon Airthings 2960 View Plus - Battery Powered Radon & Air Quality Monitor (PM, CO2, VOC, Humidity, Temp, Pressure)
Airthings
Airthings View Plus (2960)
4.0 (1,974)

Radon plus PM2.5, CO2, and VOCs on batteries, from the best-known radon brand.

$265.95
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Side-by-side

Swipe the table sideways to see every column.

#MonitorPriceRatingReviewsWorks withMeasuresCO2 sensorPowerScore
1Airthings View Plus (2960)$265.954.01,974Radon, PM2.5, CO2, VOCs, humidity, temp, pressureYesBattery88
2Amazon Smart Air Quality Monitor$46.994.25,547PM2.5, VOCs, CO, temperature, humidityNo CO2 sensorPlug-in80
3SwitchBot CO2 Detector (Meter Pro)$59.494.3322CO2, temperature, humidityNDIRBattery73
4GoveeLife H5140 CO2 monitor$69.994.5235CO2, temperature, humidityNDIRNot stated in bullets73
5BREATHE Airmonitor Plus Gen 2$129.994.0495Breathe Tech appCO2, PM1/2.5/10, TVOC, formaldehyde, temp, humidityNDIRPlug-in, 6-hour battery72
6SONOFF AirGuard CO2 SAWF-08P$49.904.4173CO2, temperature, humidityNDIRPlug-in72
7GoveeLife H5106 PM2.5 monitor$39.984.31,039GoveeLife appPM2.5, temperature, humidityNo CO2 sensorWired69
8SONOFF SAWF-07P$39.903.7193PM2.5, PM10, temperature, humidityNo CO2 sensorPlug-in64
9Temtop M10+$95.004.2151Temtop appCO2, PM2.5, TVOC, temperature, humidityYesBattery, up to 60 days62
10AprilAire ZAWTHCPV$169.994.134AprilAire Healthy Air appCO2, VOCs, PM2.5, temperature, humidityYesNot stated in bullets56

Works with: hover or tap an icon for the system name. A system is shown when it supports the product directly or through the hub the listing requires. Airthings and SwitchBot also have official Home Assistant integrations.

The full ranking

Scored out of 100: 45% customer rating, 30% review volume, 25% features.

#1
Airthings 2960 View Plus - Battery Powered Radon & Air Quality Monitor (PM, CO2, VOC, Humidity, Temp, Pressure)
Best With Radon
Airthings

Airthings 2960 View Plus - Battery Powered Radon & Air Quality Monitor (PM, CO2, VOC, Humidity, Temp, Pressure)

4.0 1,974 reviews
Score 88/100
$265.95
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1K+ bought in past month

The monitor to get if radon is a concern, with nearly every other reading too.

Measures
Radon, PM2.5, CO2, VOCs, humidity, temp, pressure
CO2 sensor
Yes
Power
Battery
App and alerts
Airthings app

Pros

  • Digital radon detector
  • Seven readings in one
  • Battery powered
  • Free 5-year warranty with registration

Cons

  • $265.95
  • 4.0 stars
  • Radon readings take days to settle
#2
Amazon Smart Air Quality Monitor, Detects temperature, humidity, carbon monoxide, PM2.5 and VOCs, Get notifications when air quality drops, Works with Alexa
Best for Alexa
Amazon

Amazon Smart Air Quality Monitor, Detects temperature, humidity, carbon monoxide, PM2.5 and VOCs, Get notifications when air quality drops, Works with Alexa

4.2 5,547 reviews
Score 80/100
$46.99
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2K+ bought in past month

The easiest pick for Alexa homes, with alerts on Echo speakers and routines that run purifiers and fans.

Measures
PM2.5, VOCs, CO, temperature, humidity
CO2 sensor
No CO2 sensor
Power
Plug-in
App and alerts
Alexa app, Echo announcements

Pros

  • Alexa routines can run purifiers, fans, and dehumidifiers
  • Announcements on Echo devices
  • 5,547 reviews, sold by Amazon
  • $46.99

Cons

  • No CO2 sensor
  • Alexa only
  • Not a UL-listed CO alarm
#3
SwitchBot CO2 Detector, Air Quality Monitor Indoor, CO2 Monitor for CO2/TEMP/Humidity, Portable Carbon Dioxide Detector for Home/Car/Office/Greenhouse
SwitchBot

SwitchBot CO2 Detector, Air Quality Monitor Indoor, CO2 Monitor for CO2/TEMP/Humidity, Portable Carbon Dioxide Detector for Home/Car/Office/Greenhouse

4.3 322 reviews
Score 73/100
$59.49
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400+ bought in past month

A portable NDIR CO2 meter with a screen, for bedrooms and offices.

Measures
CO2, temperature, humidity
CO2 sensor
NDIR
Power
Battery
App and alerts
SwitchBot app; remote alerts need a SwitchBot Hub

Pros

  • NDIR CO2 sensor
  • Portable, battery powered
  • Official Home Assistant integration
  • 4.3 stars

Cons

  • Remote alerts need a SwitchBot Hub
  • No PM2.5
  • Bluetooth only on its own
#4
GoveeLife Smart Air Quality Monitor CO2 Detector H5140, Display & Alarm
Best Overall
GoveeLife

GoveeLife Smart Air Quality Monitor CO2 Detector H5140, Display & Alarm

4.5 235 reviews
Score 73/100
$69.99
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500+ bought in past month

The best CO2 monitor for most homes: an accurate NDIR sensor, a display, and voice assistant support.

Measures
CO2, temperature, humidity
CO2 sensor
NDIR
Power
Not stated in bullets
App and alerts
App alerts, display alarm

Pros

  • NDIR CO2 sensor
  • Display with alarm
  • Alexa and Google
  • 4.5 stars, 500+ bought in the past month

Cons

  • No PM2.5 or VOCs
  • Only 235 reviews
  • $69.99
#5
BREATHE Airmonitor Plus Indoor Air Quality Monitor w/CO₂, PM & App. Gen 2.
BREATHE

BREATHE Airmonitor Plus Indoor Air Quality Monitor w/CO₂, PM & App. Gen 2.

4.0 495 reviews
Score 72/100
$129.99
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500+ bought in past month

An 8-in-1 monitor with NDIR CO2, laser particle sensing, and formaldehyde.

Measures
CO2, PM1/2.5/10, TVOC, formaldehyde, temp, humidity
CO2 sensor
NDIR
Power
Plug-in, 6-hour battery
App and alerts
App alerts, 90-day history

Pros

  • NDIR CO2 and laser PM sensors
  • Formaldehyde
  • 90-day history with export
  • 500+ bought in the past month

Cons

  • 4.0 stars
  • $129.99
  • Voice assistants aren't named
#6
SONOFF AirGuard CO2 SAWF-08P, Smart Indoor Air Quality Monitor, Matter Compatible, 2.4GHz WiFi, CO2 Monitor for CO2/Temp/Humidity, Real-Time Display & Notification, for Bedroom, Nusery Room
Best for Matter
SONOFF

SONOFF AirGuard CO2 SAWF-08P, Smart Indoor Air Quality Monitor, Matter Compatible, 2.4GHz WiFi, CO2 Monitor for CO2/Temp/Humidity, Real-Time Display & Notification, for Bedroom, Nusery Room

4.4 173 reviews
Score 72/100
$49.90
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50+ bought in past month

A Matter CO2 monitor that plugs into every major smart home platform.

Measures
CO2, temperature, humidity
CO2 sensor
NDIR
Power
Plug-in
App and alerts
Matter, eWeLink

Pros

  • Matter over Wi-Fi
  • NDIR CO2 sensor
  • 4.4 stars
  • $49.90

Cons

  • Only 173 reviews
  • No PM2.5
  • 2.4 GHz Wi-Fi only
#7
GoveeLife Smart Air Quality Monitor with PM2.5 H5106, LED Display Wired
GoveeLife

GoveeLife Smart Air Quality Monitor with PM2.5 H5106, LED Display Wired

4.3 1,039 reviews
Score 69/100
$39.98
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700+ bought in past month

A cheap PM2.5 monitor that can switch on a Govee air purifier.

Measures
PM2.5, temperature, humidity
CO2 sensor
No CO2 sensor
Power
Wired
App and alerts
Can control Govee purifiers

Pros

  • $39.98
  • Controls Govee purifiers
  • 4.3 stars, 700+ bought in the past month

Cons

  • No CO2
  • Wired power
  • Voice assistants aren't named
#8
SONOFF SAWF-07P Smart Indoor Air Quality Monitor with PM2.5, PM10, Temperature & Humidity Sensor, Real-Time Display, Notification, Matter-Compatible, 2.4GHz WiFi, 3.73-inch Screen, for Bedroom, Nusery
SONOFF

SONOFF SAWF-07P Smart Indoor Air Quality Monitor with PM2.5, PM10, Temperature & Humidity Sensor, Real-Time Display, Notification, Matter-Compatible, 2.4GHz WiFi, 3.73-inch Screen, for Bedroom, Nusery

3.7 193 reviews
Score 64/100
$39.90
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50+ bought in past month

The particle version of SONOFF's Matter monitor, for wildfire smoke and cooking.

Measures
PM2.5, PM10, temperature, humidity
CO2 sensor
No CO2 sensor
Power
Plug-in
App and alerts
Matter, eWeLink

Pros

  • Matter over Wi-Fi
  • PM2.5 and PM10
  • $39.90

Cons

  • 3.7 stars
  • No CO2
  • Only 193 reviews
#9
Temtop M10+ 6-in-1 CO2 Meter & Indoor Air Quality Monitor
Temtop

Temtop M10+ 6-in-1 CO2 Meter & Indoor Air Quality Monitor

4.2 151 reviews
Score 62/100
$95.00
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300+ bought in past month

A battery-powered 6-in-1 monitor with an E-Ink display and an alarm you can mute.

Measures
CO2, PM2.5, TVOC, temperature, humidity
CO2 sensor
Yes
Power
Battery, up to 60 days
App and alerts
Temtop app

Pros

  • Up to 60 days on battery
  • E-Ink display
  • Mutable alarm for bedrooms

Cons

  • Check you're getting the Wi-Fi model; a Bluetooth model exists
  • 4.2 stars
  • $95
#10
AprilAire ZAWTHCPV Smart Indoor 5-in-1 Wi-Fi Air Quality Monitor (CO2, VOC, PM 2.5, Particulate Matter, Humidity and Temperature), App Controlled IAQ Monitor for Home Air Quality Sensor
AprilAire

AprilAire ZAWTHCPV Smart Indoor 5-in-1 Wi-Fi Air Quality Monitor (CO2, VOC, PM 2.5, Particulate Matter, Humidity and Temperature), App Controlled IAQ Monitor for Home Air Quality Sensor

4.1 34 reviews
Score 56/100
$169.99
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AprilAire's 5-in-1 monitor, with tips that explain each alert.

Measures
CO2, VOCs, PM2.5, temperature, humidity
CO2 sensor
Yes
Power
Not stated in bullets
App and alerts
Healthy Air app

Pros

  • CO2, VOCs, and PM2.5
  • Explains what each alert means
  • Sold by Amazon

Cons

  • Only 34 reviews
  • $169.99
  • Voice assistants aren't named

Buyer's guide

What should an air quality monitor measure?

PM2.5 (fine particles from cooking, smoke, and wildfires), CO2 (a sign of stale air in closed rooms), VOCs (fumes from cleaners and new furniture), plus temperature and humidity. Radon matters in basements in many regions.

Is a CO2 reading reliable?

Only from an NDIR CO2 sensor. Cheaper monitors estimate CO2 from VOC readings, which isn't the same thing. Look for NDIR in the listing if CO2 is the main reason you're buying.

Is an air quality monitor a carbon monoxide alarm?

Usually not. Unless it's UL 2034 listed with a loud alarm, keep a real CO alarm too.

More Wi-Fi reviews

Wi-Fi light switches →Wi-Fi dimmers →Wi-Fi smart plugs →Wi-Fi bulbs →Wi-Fi door and window sensors →Wi-Fi motion sensors →Wi-Fi leak sensors →Wi-Fi temperature and humidity sensors →Wi-Fi smart locks →Wi-Fi thermostats →Wi-Fi indoor cameras →Wi-Fi outdoor cameras →Wi-Fi video doorbells →Wi-Fi garage door openers →Wi-Fi smoke and CO detectors →Wi-Fi water shutoff valves →Wi-Fi sprinkler controllers →Wi-Fi hose timers →Robot vacuums →Smart speakers →
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