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Air Quality Monitors · Head to head

Aranet Radon Plus vs GoveeLife Smart Air Quality Monitor CO2 H5140

Full Smart Air Quality Monitors comparison in 2026

Updated October 2026
Data from Amazon and official Aranet and Govee sites.
2026 verdict
These two monitors answer different questions, and the Aranet Radon Plus is the stronger air quality monitor if radon is the worry.
Aranet Radon Plus
Winner
Aranet Radon Plus
$209.00

Last recorded price

Buy on Amazon USA
It is the better reviewed device, carries a two-year warranty against one, and it is the only one that reads radon, on top of temperature, humidity and pressure, with air-quality, temperature and humidity alerts and a battery rated for years rather than a cable. The GoveeLife Smart Air Quality Monitor CO2 H5140 is the cheaper and better connected monitor, with a 4.82 inch LED panel, 2.4 GHz Wi-Fi and Bluetooth, Alexa, Google Home and Home Assistant support, and automation links to fans and humidifiers. Choose the Aranet Radon Plus to watch radon in a basement or check a mitigation system, and the GoveeLife Smart Air Quality Monitor CO2 H5140 to track ventilation in a closed room and act on it.
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FeatureAranet Radon PlusGoveeLife Smart Air Quality Monitor CO2 H5140Winner
Price$209.00$62.99GoveeLife Smart Air Quality Monitor CO2 H5140
Rating4.84.5Aranet Radon Plus
Warranty2 years1 yearAranet Radon Plus
ConnectivityBluetooth2.4 GHz WiFi, BluetoothGoveeLife Smart Air Quality Monitor CO2 H5140
IntegrationsHome AssistantGoogle Home, Alexa, Home AssistantGoveeLife Smart Air Quality Monitor CO2 H5140
SensorsRadon, Temperature, Humidity, Atmospheric PressureCO2, Temperature, HumidityAranet Radon Plus
AlertsTemperature Alerts, Humidity Alerts, Air Quality Alerts, Low Battery AlertsTemperature Alerts, Humidity Alerts, Air Quality AlertsAranet Radon Plus
Weather ResistanceIP20NODifferent strengths
ScreenYESYESTie

What the differences mean

What it measures

The Aranet Radon Plus reads radon, temperature, humidity and pressure; the GoveeLife Smart Air Quality Monitor CO2 H5140 reads carbon dioxide, temperature and humidity. Neither measures the other's headline gas, so the choice starts with the health question you are asking.

Power

The Aranet Radon Plus runs on two AA batteries rated for around seven years, so it can sit anywhere; the GoveeLife Smart Air Quality Monitor CO2 H5140 needs a USB-C cable and a mains outlet for continuous monitoring. A basement corner with no socket suits the Aranet, a desk with power suits the Govee.

Connection and app access

The Aranet Radon Plus is Bluetooth only, which is short range, while the GoveeLife Smart Air Quality Monitor CO2 H5140 adds 2.4 GHz Wi-Fi for remote readings and email reports. If the monitor lives in a basement, the Govee reaches you over the network and the Aranet may need Bluetooth proxies or Home Assistant.

Display

The GoveeLife Smart Air Quality Monitor CO2 H5140 shows its four readings on a 4.82 inch LED panel readable across a room; the Aranet Radon Plus uses a power-sipping e-ink screen whose size is not documented. Both put the current reading on the device, but only the Govee is built to be glanced at from a distance.

Acting on the reading

The GoveeLife Smart Air Quality Monitor CO2 H5140 can link compatible fans and humidifiers in its app so they react to rising CO2, and it works with Alexa, Google Home and Home Assistant. The Aranet Radon Plus is read through its own app and Home Assistant only, with no automation links, so it informs rather than acts.

Which one to buy if

Winner
Aranet

Aranet Radon Plus

Prime exclusive deal
$209.00

Last recorded price

Buy on Amazon USA
  • + Rating: 4.8
  • + Warranty: 2 years
  • + Sensors: Radon, Temperature, Humidity, Atmospheric Pressure
  • - Price: $209.00 vs $62.99
  • - Connectivity: Bluetooth vs 2.4 GHz WiFi, Bluetooth

What owners say

Owners of both monitors talk about the same reward: seeing a number they could not feel, then changing how they ventilate. Aranet Radon Plus owners praise fast ten-minute radon readings that match mail-in lab tests, the clear e-ink display, the multi-year battery and the easy app for graphing risk, and their caveats are the premium price and Bluetooth-only range that can need proxies in a basement. GoveeLife Smart Air Quality Monitor CO2 H5140 owners describe CO2 climbing past 1000 ppm in a closed office and feeling more alert after they aired the room, along with a big readable display and configurable alarms; their recurring warnings are that it is not a carbon monoxide alarm, that it misses particulates, and that 2.4 GHz pairing or range can be a pain.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Aranet Radon Plus
  • GoveeLife Smart Air Quality Monitor CO2 H5140

Loading price history...

Frequently Asked Questions

Which is better overall: Aranet Radon Plus or GoveeLife Smart Air Quality Monitor CO2 H5140?

The Aranet Radon Plus wins on sensors, warranty, alerts and owner feedback, and it is the only one that measures radon. The GoveeLife Smart Air Quality Monitor CO2 H5140 wins on price, connectivity and integrations, so the better question is whether you are monitoring radon or carbon dioxide.

What is the biggest difference between the Aranet Radon Plus and the GoveeLife Smart Air Quality Monitor CO2 H5140?

The gas. The Aranet Radon Plus measures radon, temperature, humidity and pressure on a battery rated for years, while the GoveeLife Smart Air Quality Monitor CO2 H5140 measures carbon dioxide, temperature and humidity from USB-C power with Wi-Fi and a large display.

Does either monitor measure carbon monoxide?

No. The GoveeLife Smart Air Quality Monitor CO2 H5140 measures carbon dioxide, which is about ventilation, not the poisonous carbon monoxide a safety alarm detects, and the Aranet Radon Plus does not measure either. A separate CO alarm is still needed.

Which one works with Alexa, Google Home or Home Assistant?

The GoveeLife Smart Air Quality Monitor CO2 H5140 works with Alexa, Google Home and Home Assistant. The Aranet Radon Plus works with Home Assistant only, through the Aranet integration, and has no voice assistant or Matter support.

Who should buy the Aranet Radon Plus?

A homeowner in a radon-prone area or with a basement who wants continuous, lab-comparable radon readings on a unit that runs for years on AA batteries, and who can live with Bluetooth range or bridge it through Home Assistant.

Who should buy the GoveeLife Smart Air Quality Monitor CO2 H5140?

Anyone who spends the day in a closed room and wants to watch CO2 on a big LED display, get buzzer and email alerts, and optionally trigger a linked fan or humidifier, with Alexa and Google Home access over 2.4 GHz Wi-Fi.

Full comparison table

Compare all 32 Air Quality Monitors side by side

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