> For the complete documentation index, see [llms.txt](https://help.aranet.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.aranet.com/aranet-rn+/aranet-radon-plus/faq.md).
# FAQ
How can I adjust the settings on Aranet Radon Plus sensor?
Settings can be adjusted using the button on the side of the sensor or through the Aranet Home mobile app.
Do I need to register to use the device?
No registration is necessary. You can use Aranet Radon Plus sensor as a standalone device or sync it with the free Aranet Home app for a comprehensive data history and analysis.
How often does Aranet Radon Plus sensor transmit data?
Aranet Radon Plus sensor updates the radon levels reading every 10 minutes, with the first highly reliable result in just one hour.
What is the purpose of the color-coded indication bars on the sensor?
The color-coded bars (green, yellow, red) indicate the radon concentration levels and warn you of unhealthy levels. The thresholds for these bars can be adjusted via the Aranet Home app. The default thresholds are set following the World Health Organization (WHO) Radon guidelines.
How fast do I get the first radon reading?
You’ll see the first result about 10 minutes after setup.
When is the reading fully accurate?
Accuracy stabilizes within 1 hour of operation. Long-term averages (24h, 7d, 30d) refine precision further.
Where should I place the monitor at home?
Place it on a flat surface in the lowest lived-in level, such as a basement or ground-floor room. Keep it away from direct sunlight and high humidity (over 85%).
What are the recommendations for indoor air humidity?
Indoor humidity levels should range from 30% to 50%. This range supports comfort and health, while also helping to prevent mold growth.
How do I change temperature measurement unit type?
It is possible to change the temperature measurement unit type separately both on the Aranet Radon Plus sensor display, using the switch that is located on the side of device and in the Aranet Home app. The temperature can be displayed in either Celsius or Fahrenheit degrees in both places.
The temperature measurement unit on Aranet Radon Plus sensor display can be changed with the help of the second dip switch in the battery compartment.
Does it work without cables or Wi-Fi?
Yes. It’s battery-powered and cable-free. Bluetooth is optional and used only if you connect it to the Aranet Home app.
How to export measurement data from Aranet Home App?
Simply go into your Aranet Home App, and tap onto the dashboard view in the top right corner. Once there, tap on the “Sharing” icon in the top right corner and choose how you would like to share or download it.
How can I extend the warranty on my Aranet Home products?
You can extend the warranty of your Aranet Home products by an additional 12 months by registering the product and agreeing to receive email updates from SAF Tehnika. You can withdraw your consent to receive emails anytime without affecting the extended warranty.
[Register your product](https://aranet.com/en/home/register-product)
How can I return my Aranet sensor?
If you’re facing issues with your product, please fill in the returns form.
[Return form](https://rma.aranet.com/)
Why is my Aranet Radon Plus restarting unexpectedly?
If your Radon Plus sensor is restarting unexpectedly, the cause may be oxidation or corrosion on the battery contacts.
Please follow these steps:
1. Remove the batteries.
2. Carefully clean the battery contacts using a small flat-head screwdriver or another suitable tool to gently remove any oxidation or corrosion.
3. Reinstall the batteries.
4. Check whether the sensor is operating normally.
5. Monitor your device for at least a month.
If the problem persists after cleaning the contacts, please contact our support team for further assistance.
Or fill out the [RMA](https://rma.aranet.com/) form.
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