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Last updated November 2026

Aranet Radon Plus

A premium radon detector with 10-minute readings, temperature, humidity and pressure, a great e-ink display and Home Assistant support, on Bluetooth only.

4.8
300 ratings

#6 Top Rated in Air Quality Monitors

$209.00
As an Amazon Associate I earn from qualifying purchases
Launch Year: 2024

Model: Aranet Radon Plus

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Our review

Aranet Radon Plus Review: Fast, Accurate Radon Monitoring With a 7-Year Battery

The verdict

The Aranet Radon Plus is a highly-rated radon detector that also tracks temperature, humidity and pressure. Owners love how fast and accurate it is: it takes a reading every 10 minutes (much quicker than the older Aranet Wave), matches mail-in lab tests, and comes from a brand with a strong accuracy reputation, even appearing on independent government-recommended lists. It pairs a clear, power-efficient e-ink display with a multi-year battery (rated around seven years, or use your own rechargeables), an easy Bluetooth app that graphs radon over time and color-codes risk, and Home Assistant support for remote dashboards and threshold alerts. The main limitations: it is pricier than rival radon monitors, it is Bluetooth-only with no Wi-Fi (short range, so a basement may need Bluetooth proxies or Home Assistant), and there is no cloud sync. For accurate, low-maintenance radon monitoring, it is one of the best, hence its strong rating.

Best for
  • Accurate radon monitoring
  • Basements and radon-prone areas
  • Tracking a mitigation system
  • Home Assistant users

Pros

  • Fast 10-minute radon readings, much quicker than the older Aranet Wave
  • Accurate, matching mail-in lab tests; strong accuracy reputation
  • Clear, power-efficient e-ink display (Bq/m3 or pCi/L selectable)
  • Multi-year battery (rated ~7 years), or use your own rechargeables
  • Easy app with color-coded radon graphs; also tracks temperature, humidity and pressure
  • Home Assistant support for dashboards and threshold alerts

Cons

  • Pricier than competing radon monitors
  • Bluetooth only, short range (a basement may need proxies or Home Assistant)
  • No Wi-Fi and no cloud sync (data stays on the synced phone)
  • Needs time to settle into a good averaged reading
  • No Alexa, Google Home, HomeKit, SmartThings or Matter
  • Radon-focused; not a full multi-pollutant air monitor

Who is the Aranet Radon Plus for?

This is a premium radon detector for homeowners who want fast, accurate, low-maintenance monitoring. It measures radon plus temperature, humidity and air pressure, takes a reading every 10 minutes, and shows results on a clear e-ink display (selectable in Bq/m3 or pCi/L). It connects over Bluetooth to a free app that graphs radon over time and color-codes risk, and it integrates with Home Assistant (broadcasting every 5 minutes) for dashboards and threshold notifications; there is no Wi-Fi, Alexa, Google Home, HomeKit, SmartThings or Matter. It runs on batteries rated for around seven years (or your own rechargeable NiMH cells). It best suits anyone monitoring radon in a basement or radon-prone area, people validating or watching a radon mitigation system, and Home Assistant users who want the data in a wider smart-home setup. It is radon-focused, with temperature, humidity and pressure as supporting context.

What buyers love

Speed and accuracy lead the praise. The 10-minute measurement is called much faster than the older Aranet Wave, and owners repeatedly report that readings match mail-in laboratory tests, backing Aranet's strong accuracy reputation (one Canadian reviewer notes it appears on independent government-recommended lists). The e-ink display is comfortable to read and power-efficient, contributing to the multi-year battery life, and being able to use your own rechargeable batteries is appreciated. The Bluetooth app pairs easily the first time, graphs radon over time, and color-codes danger so you can see how levels respond to opening windows or running HVAC, and it doubles as a tool to confirm a mitigation system is working. Home Assistant support is a highlight for tinkerers, enabling custom charts and high-radon notifications. Overall, owners feel it is good value relative to other radon detectors despite the price, and trust it for peace of mind.

What to know before you buy

The trade-offs are modest but worth knowing. It is more expensive than competing radon monitors, in line with Aranet's premium positioning. It is Bluetooth-only with no Wi-Fi, and the range is short, so if you keep it in a basement you may see occasional connection failures; the fixes are to add Bluetooth proxies around the house or to use Home Assistant for remote access. There is no cloud sync, so data lives on the phone it syncs with (the device still logs continuously and restores the day's readings when you reconnect). As with any radon monitor, it needs some time to settle into a good averaged reading. None of these undercut the core experience, but if you want hands-off Wi-Fi access or cloud backup out of the box, factor them in.

Is the Aranet Radon Plus worth it?

For radon monitoring, yes: it is fast, accurate, well-built and low-maintenance, with a clear display, a multi-year battery and an easy app, and owners trust it enough to validate mail-in lab tests and mitigation systems. Its strong rating reflects that. It is especially worthwhile for a basement or radon-prone home, or to keep an eye on a mitigation fan over time, and Home Assistant users get extra value. Just accept that it costs more than rivals, is Bluetooth-only (add proxies or use Home Assistant for remote access), and has no cloud sync. If you want the cheapest radon monitor or built-in Wi-Fi, look elsewhere; if you want one of the most accurate, hassle-free radon detectors available, the Radon Plus is an excellent choice.

Frequently asked questions

How fast and accurate is it?

It takes a reading every 10 minutes, much faster than the older Aranet Wave, and owners consistently report it matching mail-in laboratory radon tests. Aranet has a strong accuracy reputation, and it appears on some independent government-recommended lists. It still needs time to settle into a good averaged reading.

Does it have Wi-Fi?

No. It connects over Bluetooth only, which is short range, so a basement placement may drop the connection. You can add Bluetooth proxies around the house or use Home Assistant for remote, continuous access; there is no Wi-Fi or cloud sync.

What does it measure besides radon?

Along with radon, it tracks temperature, humidity and air pressure, all viewable with history in the app. You can display readings in Bq/m3 or pCi/L. It is radon-focused rather than a full air-quality monitor with CO2 or particulates.

How long does the battery last?

It is rated for around seven years thanks to the low-power e-ink display, and you can also use your own rechargeable NiMH batteries. Battery maintenance is minimal.

Does it work with Home Assistant?

Yes. With the Aranet integration and a Bluetooth-capable Home Assistant node (and Smart Home Integration enabled in the Aranet app), it broadcasts readings every 5 minutes, so you can build custom charts and set high-radon notifications. There is no other smart-home platform support.

Company
Aranet logo

Aranet

4.7/ 5 avg ratingLatvia flagHeadquartered in Latvia

Aranet, a brand of SAF Tehnika in Latvia, makes wireless sensors best known for the Aranet4 CO2 monitor. Its devices use long-range, low-power radio to track CO2, temperature, humidity and pressure, with long battery life and an E-ink display. Aranet is widely used in offices, schools and homes for reliable, accurate CO2 monitoring.

Full specifications

Every spec, organized

Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.

Weather Resistance

IP20

IP20: protected against solid objects over 12 mm, no protection against water.

Dimensions

2.8 × 2.8 × 3 in 71 × 71 × 77 mm

Weight

7.8 oz 220 g

Wired

NO

Battery Type

2x AA

Battery Life

7 years

2.4 GHz WiFi

NO

5 GHz WiFi

NO

Ethernet

NO

Bluetooth

YES

Z-Wave

NO

Zigbee

NO

Thread Protocol

NO

Other

NO

Screen

YES

Screen Type

E-Ink

Color Screen

NO

Touch Screen

NO

Screen Size

?

Screen Resolution

?

Google Home

NO

Alexa

NO

Aranet sensors are Bluetooth instruments read by the Aranet app or the Aranet PRO base station, with no Alexa skill

Apple HomeKit

NO

Samsung SmartThings

NO

Home Assistant

YES

Matter

NO

TVOC

NO

PM0.1

NO

PM0.3

NO

PM1

NO

PM2.5

NO

PM10

NO

CO

NO

CO2

NO

NOx

NO

Radon

YES

Temperature

YES

Humidity

YES

Atmospheric Pressure

YES

Ambient Light

NO

UV

NO

Occupancy

NO

Ambient Noise

NO

Temperature Alerts

YES

Aranet Home app push notifications fire when a sensor moves past its configured thresholds, temperature included.

Humidity Alerts

YES

Aranet Home app push notifications fire when a sensor moves past its configured thresholds, relative humidity included.

Air Quality Alerts

YES

Scientifically guided radon alarm

Low Battery Alerts

YES

The Aranet Home app notifies when the battery is low on battery-powered devices.

Automations

NO

History Records

YES

Local Control

YES

The core Aranet integration reads this sensor directly over Bluetooth, IoT class Local Push.

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