# Aranet - For Home
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Find quick setup guides, troubleshooting steps, and answers to common questions for your Aranet Home devices.\
Whether you're installing your sensor for the first time or solving a connection issue — we’re here to help.
# Aranet4 Home
The **Aranet4** is a portable indoor air quality monitor designed to measure CO₂ concentration, temperature, relative humidity, and atmospheric pressure in real time. Featuring a clear e-ink display and long battery life, it provides continuous monitoring and visual alerts to help maintain healthy indoor environments. This section provides product information, technical specifications, firmware details, usage guidance, and troubleshooting instructions to ensure accurate measurements and reliable operation.
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[General](/aranet4/aranet4-home/general)
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[Documents & Firmware](/aranet4/aranet4-home/documents-and-firmware)
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[Usage & Measurements](/aranet4/aranet4-home/usage-and-measurements)
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[Aranet Home App](/aranet4/aranet4-home/aranet-home-app)
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[Maintenance & Safety](/aranet4/aranet4-home/maintenance-and-safety)
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[FAQ](/aranet4/aranet4-home/faq)
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# General
This page explains the main features and functionality of the Aranet4 device, including its measurements, display indicators, and basic operating principles.
# What Does the Aranet4 Do?
#### A CO2 monitor that tells you when to air out your room!
Aranet4 HOME measures CO2, temperature, humidity, and ambient pressure in real time. It shows when indoor air becomes stale and reminds you to ventilate for better focus, sleep, and health. Battery powered, cable free, connects to the Aranet Home app for trends and alerts.
The device is suitable for monitoring the CO₂ level at home, in school, office,
or any other indoor environment.
Measurement data is displayed on a power-efficient e-ink screen with a long battery life. Additionally, the device
provides visual and optional buzzer notifications when the CO₂ concentration becomes unhealthy. CO₂
concentration levels of 1400 ppm (parts per million) and up are unhealthy and can cause drowsiness and decrease
cognitive function by 50%. A high concentration of CO₂ is an indicator of insufficient ventilation, which can increase
the risk of infection with airborne diseases.
#### Carbon Dioxide (CO₂)
The Aranet4 uses a **Non-Dispersive Infrared (NDIR)** sensor to measure carbon dioxide levels. Inside the device, an infrared light source shines through an air chamber toward a detector. CO₂ molecules absorb light at a specific infrared wavelength (\~4.26 μm). By measuring how much light is absorbed, the device calculates the CO₂ concentration. NDIR sensors are highly stable, selective, and the industry standard for accurate indoor air monitoring.
#### Temperature and Relative Humidity (T/RH)
Temperature and humidity are measured using a **precision digital sensor** that includes a tiny thermistor and a capacitive humidity element. The thermistor changes its electrical resistance with temperature, while the humidity element changes capacitance based on moisture in the air. The sensor converts these physical changes into digital readings, giving accurate T/RH measurements with minimal drift.
#### Atmospheric Pressure (hPa)
The Aranet4 includes a barometric pressure sensor to ensure accurate CO₂ measurements. Because NDIR CO₂ sensing depends on the number of gas molecules inside the optical chamber, changes in atmospheric pressure—caused by weather or altitude—would otherwise influence the reading. By monitoring pressure, the Aranet4 can automatically compensate for these variations, delivering consistent, precise CO₂ values regardless of environmental conditions.
# Device Lifespan
Excluding the batteries, the NDIR sensor itself can last up to 15 years. The battery life of two AA batteries that the device uses is dependent on some conditions. See the table below:
#### Battery lifetime
#### Waste of electronics
Waste batteries and electronic equipment must be taken to household hazardous waste collection points! You may search the internet for the closest collection point in the area where you are located.
**Never** put these items in household garbage or recycling bins!
**Do not expose** the batteries to fire! Do not dismantle them!
Waste of batteries and electronic equipment can contain substances and materials that can harm the environment and living beings if treated as regular household waste.
# Power Options
The Aranet4 can run either on standard AA batteries or via a dedicated AC power adapter. Out-of-the-box it uses **two AA batteries**, which — thanks to its power-efficient e-ink display and smart power management — can last for a few years and potentially much longer if data updates are infrequent. For installations where you prefer continuous monitoring without battery maintenance, an **optional AC adapter** can be used to keep the device powered indefinitely. The power adapter can be found here:
# Documents & Firmware
This page explains how to access product documentation, download firmware updates, and maintain the latest device software version.
# Documents
**Aranet4 user manual** can be downloaded from: [**Aranet4 Home User Manual**](https://assets.aranet.com/documents/Aranet4_HOME_TDSPC0H3_User_Manual.pdf)
**Datasheet:** [**Aranet4 Home Datasheet**](https://assets.aranet.com/documents/Aranet_Datasheet_TDSPC0H3_Aranet4_HOME_2.pdf)
**Quick start guide:** [**Aranet4 Quick Start Guide**](https://assets.aranet.com/documents/Aranet4_Quick_Start_Guide_V020226.pdf)
# Firmware Changelog
Aranet4 Home
**v2.0.7 (2025-05-08)**
* Initial custom threshold values now match default threshold values.
* PRO versions can now disable screen refresh and measurement display.
* Added platform support for the mioty protocol on PRO versions.
**v1.5.44 (2025-03-18)**
* Improved display driver stability.
* Improved GUI: added sensor ID on screen.
**v1.4.19 (2024-08-26)**
* Improved battery life
* Improved new battery detection in low battery state
**v1.4.14 (2023-11-28)**
* Optimized memory management to obtain up to 30 days of on-device data history.
* Introduced CO₂ on-demand measurement for all sensor HW types.
* Bluetooth extended range functionality fixed to support all sensor HW types.
**v1.3.5 (2023-06-06)**
* Introduced CO₂ on-demand measurement support.
**v1.2.0 (2022-10-12)**
* New Bluetooth service UUID.
* Measurement data included in Bluetooth advertising packet.
**v0.4.10 (2021-10-13)**
* Reduced consumption of LoRa radio for PRO version HW.
* CO₂ sensor intermittent read failure fixed.
* Sensor ID shown on screen for PRO version HW.
# How to Update Firmware
Starting from Aranet Home app version v2.0 firmware update can be done as follows:
1. Click on the settings “wheel” icon in the record of the necessary device;
2. In the newly opened page click on section **Firmware**;
3. Finally click on the button **START UPDATE**:
**Important!** Sometimes there might be an issue where the sensor is stuck during some operation, for example, a firmware upgrade. In this case, it is advised to open the Aranet4 app and try to add a new sensor. In most cases, this sensor will be discovered, paired back to the app and working again. If the issue still persists, please contact
# Stuck in Firmware Upgrade Mode
If your Aranet device gets stuck in firmware update, then follow these steps:\
NOTE: This only works from the Aranet Home app v3.4.2. As such, you should update your app before trying this.
1. Remove batteries and place them back after a few minutes.
2. Do “PAIR NEW DEVICE” from the application settings menu – the app will find the failed Aranet4 device and will start firmware recovery
# Usage & Measurements
This page explains how Aranet4 performs measurements, including sensor behavior, data interpretation, and measurement intervals.
# Data Storage
The amount of historical measurement data stored is directly tied to the measurement interval set on the device:
Measurement interval, minutes
Historic data availability, days
10
30
5
15
2
7
1
3.5
**Memory management**
Altering the measurement interval triggers a restructuring of existing data in the memory system.
For instance, switching from a shorter interval (e.g., 1 minute) to a longer one (e.g., 10 minutes) aggregates ten 1-minute measurements to compute and store an average value. Conversely, adjusting from a longer interval (e.g., 10 minutes) to a shorter one (e.g., 1 minute) generates supplementary data in 1-minute intervals by extrapolating values from 10-minute measurements, creating a sequence of 10-minute "steps" with identical values.
Frequent changes in measurement intervals are discouraged due to the resulting data loss caused by averaging and padding.
If more frequent measurements are required, use the "on-demand measurement" feature for instant measurement.
**Background data download**
The data can be downloaded in the background if the application runs as a background process and "Background data read" is enabled in the app settings.
**Note:** This information pertains to firmware version v1.4.14 onwards. Refer to the [changelog of the firmware](/aranet4/aranet4-home/documents-and-firmware/firmware-changelog) for additional details.
# Default Settings
The Aranet4 is calibrated in the factory, and it works instantly when it you take it out of the box and insert the batteries – no additional setup is needed. These are the default settings of the Aranet4 device:
1. The default measurement interval is set to 5 minutes;
2. CO₂ sensor automatic calibration is disabled;
3. The default temperature measurement units are set to Celsius;
4. Bluetooth connection is enabled;
5. Bluetooth connection transmission range is set to normal;
6. The buzzer for audio sound alarm notifications is disabled;
7. CO₂ indication is set to human mode;
8. Access to Homey Smart Home assistant is enabled.
The 2nd, 3rd and 4th settings can be changed with the switches in the battery compartment on the back of the device for the Aranet4 screen, but the remaining five settings can only be changed via the Aranet Home phone application.
# Calibration and Its Errors
#### How to calibrate?
The Aranet4 can be calibrated either automatically or manually at home. The general recommendation is to redo the calibration for Aranet4 sensors once per year, as the sensor measurement values will start to drift over time.
Out-of-the-box brand new sensors have the factory calibration and for some time there is no need to do it and measurements will be precise just by putting the batteries and pairing sensors to the Aranet PRO base station.
In the case of automatic calibration mode, the Aranet4 device will use the lowest ppm data of approximately 8 hours of the lowest measurements during each 30-day operation period. If the lowest recorded measurement was 460 ppm, then this will be considered as 420 ppm. In automatic calibration, the deviation might vary.
When doing a **manual** calibration the Aranet4 device must be exposed to fresh air (about 420 ppm of CO₂) and the environment should be stable (not changing) for 30 minutes while the calibration is done. Maintain a distance of at least 1 meter from the device during the calibration process so the CO₂ from your breath wouldn’t impede the calibration. To initiate the manual CO₂ calibration change the switch position at the back of the device behind the batteries from MANUAL to AUTO and back to MANUAL (maintain a maximum of 1 second between each movement):
**Please note! The batteries must be inserted into the device. To trigger the switch, use SIM-tool delivered with Aranet4 or another similar tool.**
The calibration progress will be displayed on the screen of the device. In case of a calibration failure message, make sure that the environmental requirements are met and repeat the process from the beginning.
**Manual calibration can be done using the Aranet Home app as well.** You can see the instructions on how to do the manual calibration via the app.
For reference background CO₂ level please check the global outdoor CO₂ level map: \
Click with the mouse pointer to your location on the map, and you will see current CO₂ level outdoors.
#### Calibration error
#### CALIBRATION FAILED ! Unexpected error
Remove the batteries for 15 minutes and try the calibration again. If the calibration is still not possible and an error is still shown on the screen of the device, then please proceed with the RMA process: [**https://rma.aranet.com/**](https://rma.aranet.com/)
#### Calibration failed, unstable environment
The error message "Calibration failed, unstable environment" - means that during the calibration process of the Aranet4 device, the CO₂ concentration level changes in the surrounding air were too large for the device to correctly set the 420 ppm calibration baseline.
To recover the operation of the device and obtain a successful and correct calibration result, please try:
1. Take out the batteries of the Aranet4 device;
2. Put batteries in the correct polarization again inside the device (both batteries in the same direction with + pole on the left side);
3. Restart the phone where the Aranet4 application is installed;
4. Try the calibration again as shown in the video, except it is better to put the sensor, if possible, in an outdoor environment during the calibration process for 15 minutes without any person nearby;
{% embed url="" %}
If the calibration is still not possible and an error is still shown on the screen of the device, then please proceed with the RMA process: [**https://rma.aranet.com/**](https://rma.aranet.com/)
#### Other error messages
There are three kinds of error messages that can appear on the screen of the device:
| Error code | Cause | Solution |
| ----------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 0x8001 – 0x8005 | The CO₂ sensor is damaged | Fill out the [RMA form](https://rma.aranet.com/) |
| 0x8106, 0x800E – 0xFFFE |
CO₂ sensor malfunction or CO₂ measurement is out of range, caused by:
|
# Where to Place the Device in a Room
The Aranet4 can be placed anywhere in the room where you tend to spend a lot of time – on a surface, or mounted on the wall, where it can be comfortably seen. Since people and animals exhale CO₂, the readings can be momentarily higher if you breathe directly on the sensor, so holding the sensor in your hand can sometimes give a higher measurement. However, placing the sensor near a window or entrance door might give a slightly lower reading because of the airflow in these areas.
The Aranet4 should not be placed in direct sunlight or in areas with a risk of splashing the sensor with different liquids, or high-humidity environments (higher than 85%), such as your bathroom. Place the sensor in a safe place where it cannot accidentally be dropped because it isn’t drop-proof.
When placing the sensor, make sure the openings on the sides of the device aren't covered.
# Use in High Altitude Areas
The CO₂ sensor of the device is calibrated at standard atmospheric pressure. If the device has to be used at high altitude, [manual calibration](/aranet4/aranet4-home/usage-and-measurements/calibration-and-its-errors) of the unit should be performed. It is not intended to use the device higher than 4000 m (13 000 ft) above sea level.
# Powering via cable
You can power your Aranet4 Home, Aranet4 PRO, or even Aranet2 device using the [Aranet4 AC Power Adapter](https://aranet.com/en/pro/products/aranet4-ac-power-adapter).
# Aranet Home App
This page explains how to connect Aranet Home sensor to the Aranet Home mobile application, including pairing procedures and available app features.
# Aranet Home App Overview
The Aranet Home app is the companion mobile app for Aranet’s indoor-environment sensors (like Aranet4, Aranet2, Aranet Rn+, Aranet Radon One and Aranet Radiation sensor devices).
Compatible with both iOS (iPhone / iPad) and Android.
Using the app, you get a convenient hub for monitoring, configuring, and analysing data from your sensors. Key features:
* **Real-time readings** — view current measurements (CO₂, temperature, humidity, atmospheric pressure, and more, depending on the device).
* **Measurement history & data storage** — you can store past measurements (history) and review data over time. The app supports up to **90 days** of history (depending on the device and its settings).
* **Customizable measurement intervals** — you can set how often the sensor measures and sends data: 1, 2, 5, or 10 minutes.
* **Charts & data visualisation** — the app turns raw sensor data into easy-to-read charts and colour-coded visuals, so you can spot trends (like CO₂ spikes, humidity swings, etc.) over time.
* **Export data** — you can export stored data (e.g. CSV or XLSX), which is useful if you want to analyze data elsewhere or keep long-term logs.
* **Device configuration & management** — you can pair/unpair devices, update firmware, adjust sensor settings (e.g. measurement frequency, CO₂ threshold levels, buzzer/alert settings), rename devices, etc.
* **Widgets** — on supported mobile devices you can add app widgets for quick-glance values without opening the full app.
* **Smart alerts / Notifications** — the app can notify you when certain thresholds are exceeded (e.g. CO₂ levels go into “unhealthy” range) or if the battery is low (for battery-powered devices).
Also, the app supports multiple languages (English, German, French, Latvian, and more).
# How to Pair With the Aranet Home App
1. Download and install the latest Aranet Home app version:
* for iOS -
* for Android -
2. Launch the Aranet Home app.
3. Stay close to your Aranet sensor and press “+ ADD NEW DEVICE” button:
4. When the application discovers your Aranet sensor, press “+ PAIR” button:
5\. Press “ACCEPT” button when the system asks for permission:
6\. At this moment the Aranet sensor will show **6-digit number** on its screen. This is the PIN code you should enter into the application screen:
The PIN code containing 6 random digits will look like this:
Enter the PIN code in the pop-up window that appeared.
7\. In a few seconds, after you have entered the code, the Aranet sensor should be paired to your phone:
# Bluetooth and Pairing Issues
#### Why is Bluetooth pairing taking so long? Why didn’t I get a PIN request on my phone?
Bluetooth pairing usually takes about 10 to 15 seconds. If it takes more than 60 seconds or an error message appears on the screen of the device, the pairing process likely has crashed.
Access to the device’s location information is a general requirement from Android operating system developers for Bluetooth Low Energy applications to work correctly. [**Read more»**](https://developer.android.com/about/versions/marshmallow/android-6.0-changes#behavior-hardware-id)\
\
Try to restart your phone, reopen the app and repeat the pairing process. See this topic: [How to Pair with the Aranet Home app](/aranet4/aranet4-home/aranet-home-app/how-to-pair-with-the-aranet-home-app). The topic shows the pairing process, which is the same for all of the devices.
#### What would be the first things to try if the Aranet device is not pairing to the Aranet Home application on a mobile device?
Please first try:
1. Take out the batteries of the Aranet device.
2. Set jumper switch in the battery compartment for Bluetooth service in OFF (down) position, then back to ON (Up) position;
3. If you have the Aranet4 or Aranet2 Home device (Not Pro), then also make sure the 4th switch is in the OFF (down) position.
4. Put batteries in the correct polarisation again inside the Aranet (both batteries in the same direction with the + pole on the left side);
5. Uninstall the Aranet Home app completely and delete/forget the paired Aranet device from Bluetooth connected devices on the mobile device.
6. Restart the mobile device.
7. Install the application again and pair the Aranet device to the mobile device, not via the Bluetooth devices menu, but only via the Aranet Home application.
# Measurement Units
The Aranet device units can be changed in the Aranet Home App settings. The settings here are only used for the displayed units in the app. If you want to change the units on the E-Ink display, then you can do that at the back of the device behind the batteries. The 1st switch changes the units.\
For the Aranet4 and Aranet2, it changes the Temperature unit, and for the Radiation sensor changes the Radiation unit. As the Pressure measurements are only available in the app, those units can only be changed here.
The Radon sensors, you can either change the units from the device settings in the app, or using the buttons or the wheel on the side of the sensor.
# Graphs
The Aranet Home app has a built-in graph visualisation. To access it you can press the graph button and then see the graphs. The graphs will then load, and you can switch between the length of time you want to see on the graph. As well as, at the bottom of the screen, between the different measurements of the device.
The radiation sensor graph looks a bit different. There are green, yellow and red areas which correspond normal/background, above background and health risk levels. The cumulative graph also shows these levels.
# Exporting Measurement Data
Here you can also export measurement data by pressing on the button at the top right (**MAKE SURE TO WAIT UNTIL ALL DATA IS GATHERED, OR YOU WILL HAVE HOLES IN YOUR DATA)**\
You can choose to download in a .csv or a .xlsx format, and for a lot of different time intervals.\
The time format of the downloaded file is the same as the one in the app settings.
# Coloured Thresholds
Starting from Aranet Home app version v2.0.4 it is possible to change colour indication threshold levels for the measurements.\
In the example below, it is done for CO₂ measurements.
From the Aranet Home application, it is possible to change the value for both yellow and red threshold levels of the Aranet4 device in the range of 300 to 2000 ppm.
To configure these levels in the Aranet4 application, please:
1. Click on the settings “wheel” icon in the record of the necessary Aranet4 device;
2. In the newly opened page, click on the section **CO₂ indication mode**.
3. Select **Custom** indication mode.
4. Set the Yellow threshold value as necessary.
5. Set the Red threshold value as necessary.
6. Save settings by pressing on **APPLY CHANGES** button.
7. In case new threshold levels were successfully configured, then the Aranet4 application will show a success message: **CO₂ indication mode changed**.
The colour indication threshold level changing was not possible with application versions up to v1.20.\
By default, the CO₂ measurement colour indication threshold levels were as follows:\
Green – below 1000 ppm\
Yellow – 1000 - 1400 ppm\
Red – above 1400 ppm\
\
For Temperature:
Too High (red) — >26°C (78.8°F)\
Normal (green) — 20°C — 26°C (68.0 - 78.8°F)\
Too low (blue) — <20°C (68.0°F)
For RH:
Too High (red) — 70% RH\
Normal (green) — 30% RH — 70% RH\
Too low (blue) — 30% RH
For Radiation:
Green – below 0.20 μSv/h\
Yellow – 0.20 μSv/h — 10.0 μSv/h\
Red – above 10.0 μSv/h
For Radon:
Green – below 100 Bq/m3\
Yellow – 100 Bq/m3 — 300 Bq/m3\
Red – above 300 Bq/m3
# Background Data Read
Background data read is an option in the Aranet Home settings, that, when enabled, will enable the Aranet Home App on a periodic basis (once every few hours) to read data from paired Aranet devices. The devices must be within range of the phone/tablet running the Aranet Home App.
The data is then stored locally on the Aranet Home app (90 days of data storage per device).
# Notifications and Buzzer Settings
#### Push notifications
Starting from Aranet Home App v3.8.2, push notifications can be enabled in the Aranet Home app settings. (Works better with background data read enabled)\
You will get periodic notifications if any of the sensors move past their configured thresholds.
#### Buzzer
The buzzer is an audio alarm built into all of the Aranet devices. When the buzzer is enabled (switched on), the "speaker" icon is visible on the Aranet display. It can be enabled behind the batteries as the second switch and in the Aranet Home app:
To access Aranet buzzer settings, open the Aranet Home app:
1. Navigate to sensor settings by pressing the "gear" icon;
2. Click on "Buzzer" to open the drop-down menu;
3. Select the desired buzzer mode;
4. After the mode change confirmation, exit sensor settings.
# Integration Options
#### Integration
Aranet4 devices are now supported by Home Assistant [Home Assistant (home-assistant.io)](https://www.home-assistant.io/) smart home automation platform.
To enable the Aranet Home app integration, please ensure that you have an Aranet4 device with firmware version 1.2.0 or newer and Home Assistant version 2022.12 or newer and Bluetooth capability.
{% embed url="" %}
Initial configuration steps:
1. Before starting to use integration, please configure the Aranet4 device using the Aranet Home App - enable Smart Home Integration in the Aranet Home App device settings
2\. Download and set up Home Assistant Aranet integration - Please read the instructions for setting up Aranet Integration on [Home Assistant](https://www.home-assistant.io/integrations/aranet/)
***
***
***
#### Good to know:
Aranet4 is using BLE (Bluetooth Low Energy) communication protocol, which has a limited range. Please ensure a close distance between Aranet4 and the Home Assistant device to avoid connectivity issues. To improve connectivity, you can select the Extended Bluetooth range option in the Aranet Home App device settings.
# Developer specification
For DIY integrations using Bluetooth Low Energy please check the following applications that are created by 3rd party developers:\
[**Aranet4 Python client and library**](https://github.com/Anrijs/Aranet4-Python) (compatible only with Linux) or [**Interface with your Aranet4 meter via Python**](https://pypi.org/project/pyaranet4/1.0.0b2/)\
[**Progressive web app which supports Aranet4 using Web Bluetooth API**](https://github.com/kasparsd/sensor-pilot)
# Fullscreen Display on a Smart TV
#### How to display the Aranet Home application data in full-screen mode from iOS Apple devices to Apple TV?
Once the Aranet sensor is paired to the Aranet Home application on the iOS mobile device, you can display the measurement data from the sensor in full-screen mode on the app. This can be done in the following way:
1\. Click on the collapsed menu icon in the top right corner of the application main page;
2\. Click on the section **Fullscreen mode**;
3\. Select **Dark theme** or **Light theme** for the fullscreen mode;
4\. Go back to the application main page and click on the Fullscreen icon;
5\. Rotate the mobile device itself to landscape mode.
When the app is in fullscreen mode, you can mirror its screen to Apple TV:
6\. Swiping from the top right corner of the mobile device screen opens the iOS Control Centre menu and clicking on the **Screen Mirroring** icon;
7\. Wait for the mobile device to find **Apple TV** and then click on its record to see data from the Aranet4 application on the Apple TV.
#### How to display Aranet Home application data in fullscreen mode from Android devices to Smart TV?
To replicate information from any Android device to a Smart TV, both devices should support Miracast or Screen Mirroring functionality (also called HDMI over Wi-Fi).
If you have both devices compatible with Miracast, then once the Aranet4 sensor is paired to the Aranet4 application on the Android mobile device, you can display the measurement data from the sensor in full-screen mode on the app. This can be done in the following way:
1\. Click on the collapsed menu icon in the top right corner of the application main page;
2\. Click on the section **Fullscreen mode**;
3\. Select **Dark theme** or **Light theme** for the fullscreen mode;
4\. Go back to the application main page and click on the Fullscreen icon;
5\. Rotate the mobile device itself to landscape mode and now You can mirror its screen to Smart TV;
6\. Swiping from the top edge of the mobile device screen open the Android Control Panel, find the **Screen Cast** icon and click on it;
7\. Wait for the mobile device to find the Smart TV and then click on its record to see data from the Aranet4 application on the Smart TV:
# Maintenance & Safety
This page explains recommended maintenance procedures, battery handling guidelines, and safety considerations for proper device operation.
# Handling and Cleaning
The Aranet devices are advanced electronic device in a plastic case. You should handle and clean it the same way you deal with other household electronic devices.
#### Handling
* Aranet devices are not impact-resistant; do not drop or hit it.
* Aranet devices are not waterproof; do not use it in high humidity environments (greater than 85%).
* Do not leave Aranet devices in direct sunlight. This can damage the E-ink screen
* Do not expose Aranet devices to strong electromagnetic fields.
* Aranet devices are intended for use at temperatures 0 °C to 50 °C (32 °F to 122 °F). Exposure to lower temperatures can damage the device.
#### Cleaning
You can clean your Aranet device with lukewarm water and mild soap. Mix some soap and water in a bucket, clean the case using a slightly wet soft sponge or microfiber cloth to avoid scratching the material and water drops entering the case. Make sure your detergent has no harsh chemicals that could damage the plastic and sensor, such as white spirits or Clorox.
#### Disinfecting
Alcohol solutions (alcohol / purified water) or wipes with at least 70 per cent alcohol are effective for the sanitization of the Aranet case. First, clean the surface with soap and water as described above. Apply the alcohol solution and let it sit on the surface for at least 30 seconds to disinfect. Wipe dry with a clean cloth.
You can use low-power household UV-disinfectors for Aranet4 disinfection, too. Follow the UV-disinfector instructions and do not overexpose Aranet4 to UV radiation.
# Mounting on a Surface or Wall
Such mounting is normal and will not affect the device measurement precision, as air vents are located on the sidewalls of the device body.
There is even a custom-made [**Aranet4 anti-theft wall mount**](https://aranet.com/en/pro/products/wall_mount_bracket) from us as the manufacturer that can be used to secure the device in its installation place. It also works with an Aranet2
# FAQ
This page explains common questions and answers related to Aranet4 functionality, configuration, and troubleshooting.
How and when to calibrate Aranet4 Home?
Aranet4 is calibrated at the factory, so if you’ve just received your new device, there is no need to calibrate it immediately. We recommend calibrating Aranet4 once a year.
Aranet4 can be calibrated either automatically or manually at home. In automatic calibration mode, the Aranet4 device needs to be exposed to fresh air with approximately 420 ppm of CO2 (for example, outdoors or in a room with very good air exchange) for about 8 hours during each 30-day operation period.
For manual calibration, the Aranet4 device must be exposed to fresh air (around 420 ppm of CO2), such as in a forest. The environment should be stable (unchanging) for 30 minutes during the calibration. Maintain a distance of at least 1 meter from the device during the calibration process to ensure the CO2 from your breath doesn’t affect the calibration. To initiate manual CO2 calibration, change the 1st switch position at the back of the device, behind the batteries, from MANUAL to AUTO and back to MANUAL, keeping a maximum of 1 second between each movement. The batteries must be installed in the device. The calibration progress will be displayed on the device’s screen.
For a reference background CO2 level, please check a global outdoor CO2 level map. Manual calibration can also be performed using Aranet Home app. Instructions for manual calibration via the app are available in the Aranet4 Calibration Tutorial.
[Tutorial](https://www.youtube.com/watch?v=CD8E6WzpvjM) What is the NDIR sensor and why is it preferred over other types of sensors?
Aranet4 uses a non-dispersive infrared (NDIR) sensor to measure CO2 levels. The device features a small gas chamber with an infrared light source, where CO2 absorbs the light. An optical filter in front of the detector then filters out all light except the wavelength absorbable by CO2 molecules, enabling a precise CO2 concentration level measurement. This CO2 reading method offers higher precision than regular electro-chemical sensors, as it uniquely detects carbon dioxide with no interference from other gases. Furthermore, the NDIR sensor has a much longer lifespan and requires less recalibration than other sensors.
Why do I need to monitor CO₂ concentration?
High CO2 levels can negatively affect your well-being, comfort, and productivity. For example, if CO2 levels reach 1000 ppm, your cognitive abilities drop by 15%. At 1400 ppm and above, they decrease by a staggering 50%. Additionally, CO2 monitoring helps to prevent the spread of COVID-19, as CO2 level is a good proxy for airborne infection risk. How to set a buzzer on Aranet4 Home?
To set up a buzzer, follow these steps:
1\) Open your Aranet Home app;
2\) Click on the “Gear” icon in the top right corner;
3\) Select 'Buzzer' and choose 'On, once' or 'On, every time' depending on your preference.
How do I change the threshold at which Aranet4 buzzes?
If switched on, the buzzer emits a sound when the CO2 concentration reaches the red threshold, which is set by default to 1400 ppm. To change it, follow these steps:
1\) Open your Aranet Home app;
2\) Click on the 'Gear' icon in the top right corner of the sensor's tile;
3\) Select 'Warning thresholds' under 'Advanced';
4\) Choose 'Custom' and change the thresholds as desired.
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.
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 to export measurement data from Aranet Home App?
Simply go into your Aranet Home App, and tap onto the dashboard view or on the graph icon 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 export the data.
Can I find my lost Aranet4 sensor via app?
Aranet4 sensor must be within Bluetooth range to change settings within the app. If the sensor is within Bluetooth range, you can try changing the warning thresholds to custom settings (e.g., 300 ppm for yellow; 400 ppm for red, so it beeps if it is lost somewhere with fresh air). Alternate the buzzer between 'Off' and 'On Every Time' to create beeps.
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/)
How do I turn the display off?
To turn the display off, your Aranet4 device has to be paired with the Aranet Home app. Then you should head to the settings tab by pressing on the settings icon, where you will see the "Disable screen" option switch. The screen will be disabled as soon as the option is turned on.
Is it possible to downgrade the firmware?
Unfortunately, it is not possible to downgrade the firmware to any earlier version. Aranet devices support only upgrading the firmware, and rolling back to a previous firmware version is not supported.
# Aranet Radon Plus
The **Aranet Radon Plus** is a wireless environmental sensor designed for professional monitoring of temperature and relative humidity in indoor and industrial environments. Built for reliable long-term operation, it transmits measurement data to compatible Aranet Base Stations or Gateways. This section provides technical specifications, installation recommendations, configuration guidance, and operational information to support accurate and efficient deployment.
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[General](/aranet-rn+/aranet-radon-plus/general)
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[Documents and Firmware](/aranet-rn+/aranet-radon-plus/documents-and-firmware)
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[Usage and Measurements](/aranet-rn+/aranet-radon-plus/usage-and-measurements)
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[Aranet Home App](/aranet-rn+/aranet-radon-plus/aranet-home-app)
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[Maintenance and Safety](/aranet-rn+/aranet-radon-plus/maintenance-and-safety)
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[FAQ](/aranet-rn+/aranet-radon-plus/faq)
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# General
This page explains the main features and functionality of the Aranet Radon Plus device, including its measurements, display indicators, and basic operating principles.
# What Does the Aranet Rn+ Do?
Provides real-time measurements of radon gas
concentration, temperature, and relative humidity. With
its portability and extended multi-year battery life, this
device ensures convenience and reliability in continuous
indoor air quality monitoring.
#### What does Aranet Radon Plus
measure?
#### Radon Gas
Radon gas is tasteless, odourless, and hard to detect, posing serious health risks. It escapes
from the ground into the air and can accumulate in your home. According to the
[World Health Organisation](https://www.who.int/news-room/fact-sheets/detail/radon-and-health), radon is one of the leading causes of lung cancer.
Since its levels can fluctuate, regular radon monitoring is vital.
Aranet Radon Plus sensor offers real-time radon monitoring. With wireless
functionality and qualitative components, it ensures accurate measurements. The
E-Ink display and long battery life make it ideal for continuous indoor air quality
monitoring.
#### Temperature and Relative Humidity (T/RH)
Temperature and humidity are measured using a **precision digital sensor** that includes a tiny thermistor and a capacitive humidity element. The thermistor changes its electrical resistance with temperature, while the humidity element changes capacitance based on moisture in the air. The sensor converts these physical changes into digital readings, giving accurate T/RH measurements with minimal drift.
#### Atmospheric Pressure (hPa)
The Aranet Radon One includes a barometric pressure sensor, allowing you to correlate environmental conditions with radon levels and understand how ventilation or seasonal changes affect indoor radon concentrations.
# Device Lifespan
The battery life of two AA batteries that the device uses is dependent on some conditions. See the table below:
#### Waste of electronics
Waste batteries and electronic equipment must be taken to household hazardous waste collection points! You may search the internet for the closest collection point in the area you are located.
**Never** put these items in household garbage or recycling bins!
**Do not expose** the batteries to fire! Do not dismantle them!
Waste of batteries and electronic equipment can contain substances and materials that can harm the environment and living beings, if treated as regular household waste.
# Power Options
The Aranet Radon+ sensor runs on standard AA batteries. Out-of-the-box, it uses **two AA batteries**, which — thanks to its power-efficient e-ink display and smart power management — can last for a few years and potentially much longer if data updates are infrequent.
# Documents and Firmware
This page explains how to access product documentation, download firmware updates, and maintain the latest device software version.
# Documents
**The quick start guide**:
[Aranet Radon Plus Quick Start Guide](https://assets.aranet.com/documents/Aranet_Radon_Plus_QSG_041225.pdf)
**Datasheet:**
[Aranet Radon Plus Home Datasheet](https://assets.aranet.com/documents/Aranet_Datasheet_TDSPSRH2_Radon_Plus_sensor_HOME_1.pdf)
**Leaflet:**
[Aranet Radon Plus Leaflet](https://assets.aranet.com/documents/Radon_Plus_-_Leaflet_-_WEB_-_EU_-_V110325_utDO7Rv.pdf)
# Firmware Changelog
Aranet Radon Plus
v1.15.15:
* Improved radon concentration calculation algorithm on both Home and Pro devices.
* For Pro (only) devices:
* The new [Sensor Lock feature](/aranet-rn+/aranet-radon-plus/usage-and-measurements/sensor-lock-feature) is released.
v1.11.3:
* Improved low battery detection.
* Improved radon concentration calculation algorithm.
v1.9.1:
* Increased maximum displayable radon concentration to 7900 Bq/m3 (214 pCi/L).
* Improved radon concentration calculation algorithm. GUI:
* Improved menu structure.
* Added sensor ID on pairing screen.
* Improved icons.
v1.8.0:
* Added "measurement over measurable range" indication.
* Sharper display image after fast transitions. Stability enhancements:
* Improved display driver stability.
* Data processing improvements.
v1.7.2:
* Improved battery life.
* Improved high-humidity environment detection.
* Fixed average values storage.
v1.7.0:
* Improved battery life.
* Fixed the average values storage bug.
* Improved high-humidity environment detection.
v1.5.14:
* Improved battery life.
* Improved concentration averaging algorithm.
* GUI improvements.
1.5.11 Initial Firmware
# How to Update Firmware
Starting from Aranet Home app version v2.0 firmware update can be done as follows:
1. Click on the settings “wheel” icon in the record of the necessary device;
2. In the newly opened page click on section **Firmware**;
3. Finally click on the button **START UPDATE**:
**Important!** Sometimes there might be an issue where the sensor is stuck during some operation, for example, a firmware upgrade. In this case, it is advised to open the Aranet4 app and try to add a new sensor. In most cases, this sensor will be discovered, paired back to the app and working again. If the issue still persists, please contact
# Stuck in Firmware Upgrade Mode
If your Aranet device gets stuck in firmware update, then follow these steps:\
NOTE: This only works from the Aranet Home app v3.4.2. As such, you should update your app before trying this.
1. Remove batteries and place them back after a few minutes.
2. Do “PAIR NEW DEVICE” from the application settings menu – the app will find the failed Aranet4 device and will start firmware recovery
# Usage and Measurements
This page explains how Aranet Radon Plus performs measurements, including sensor behavior, data interpretation, and measurement intervals.
# Measurement Units
The Aranet device units can be changed in the Aranet Home App settings. The settings here are only used for the displayed units in the app. If you want to change the units on the E-Ink display, then you can do that at the back of the device behind the batteries. The 1st switch changes the units.\
For the Aranet4 and Aranet2, it changes the Temperature unit, and for the Radiation sensor changes the Radiation unit. As the Pressure measurements are only available in the app, those units can only be changed here.
The Radon sensors, you can either change the units from the device settings in the app, or using the buttons or the wheel on the side of the sensor.
# Data Storage
Radon Plus Sensor is compatible with smart devices conforming to Bluetooth specification 4.1 and up.
\
Bluetooth is utilized to enable the functionality of the Aranet Home mobile application. When transferring data to
Aranet Home, **device memory provides 30 days historic data availability**.
# Default settings
# Where to Place the Device in a Room
For accurate readings, the **Aranet Radon Plus sensor** should be placed where radon is most likely to accumulate and where people actually spend time. In homes, this is typically the **lowest regularly occupied level** (such as a basement or ground floor). Position the device **0.8–2 meters (2.5–6.5 ft)** above the floor, in an open area with normal air circulation. Avoid placing it near windows, doors, ventilation outlets, or exterior walls, as drafts and fresh air can dilute radon levels and distort measurements. Do not place the sensor in kitchens, bathrooms, or directly next to heat sources or electronic devices. A stable, central location away from direct sunlight will provide the most representative long-term radon measurements.
The Aranet Radon Plus sensor should not be placed in direct sunlight or in areas with a risk of splashing the sensor with different liquids, or high-humidity environments (higher than 85%), such as your bathroom. Place the sensor in a safe place where it cannot accidentally be dropped because it isn’t drop-proof.
# Sensor Lock Feature
{% hint style="danger" %}
The Sensor Lock feature is available only for the **Aranet Radon Plus Pro** sensor.
{% endhint %}
This feature is designed for professionals performing measurements in locations such as private homes, where it is important that the device is not tampered with. It can also be useful in public environments, such as schools.
{% hint style="info" %}
To use this feature, make sure the sensor firmware is updated to **version 1.15.15 or later**.
{% endhint %}
#### Functionality
When the sensor is locked:
* The screen will not show measurement data and will display the **Aranet logo** instead (similar to the screen disable feature on Aranet4 Pro).
* If the sensor button is pressed, a message will appear indicating that the device is locked and cannot be used.
* New Bluetooth pairings are not allowed. Previously paired devices will remain connected.
* The Aranet Radio connection to the base station remains unchanged.
* The sound alarm is disabled.
* The device will remain locked even if the battery compartment is opened and closed.
#### Locking the sensor after FW is upgraded
Open the Aranet Home app and go to the device settings. Check if the latest firmware version is installed. If not, update it.
After updating, the Lock device option will become available. Press **Lock device** to activate the feature.
#### Unlocking the sensor
To unlock the sensor, use the Aranet Home app. Open the app and go to the device settings.
Find the Lock device option and press on it. As soon as the switch is in light grey, the device is unlocked.
After unlocking, the sensor will return to normal operation, and measurements will be visible again.
{% hint style="info" %}
In case, where you are not able to unlock the device, please contact with
{% endhint %}
# Aranet Home App
This page explains how to connect Aranet Home sensors to the Aranet Home mobile application, including pairing procedures and available app features.
# Aranet Home App Overview
The Aranet Home app is the companion mobile app for Aranet’s indoor-environment sensors (like Aranet4, Aranet2, Aranet Rn+, Aranet Radon One and Aranet Radiation sensor devices).
Compatible with both iOS (iPhone / iPad) and Android.
Using the app, you get a convenient hub for monitoring, configuring, and analysing data from your sensors. Key features:
* **Real-time readings** — view current measurements (CO₂, temperature, humidity, atmospheric pressure, and more, depending on the device).
* **Measurement history & data storage** — you can store past measurements (history) and review data over time. The app supports up to **90 days** of history (depending on the device and its settings).
* **Customizable measurement intervals** — you can set how often the sensor measures and sends data: 1, 2, 5, or 10 minutes.
* **Charts & data visualisation** — the app turns raw sensor data into easy-to-read charts and colour-coded visuals, so you can spot trends (like CO₂ spikes, humidity swings, etc.) over time.
* **Export data** — you can export stored data (e.g. CSV or XLSX), which is useful if you want to analyze data elsewhere or keep long-term logs.
* **Device configuration & management** — you can pair/unpair devices, update firmware, adjust sensor settings (e.g. measurement frequency, CO₂ threshold levels, buzzer/alert settings), rename devices, etc.
* **Widgets** — on supported mobile devices you can add app widgets for quick-glance values without opening the full app.
* **Smart alerts / Notifications** — the app can notify you when certain thresholds are exceeded (e.g. CO₂ levels go into “unhealthy” range) or if the battery is low (for battery-powered devices).
Also, the app supports multiple languages (English, German, French, Latvian, and more).
# How to Pair With the Aranet Home App
1. Download and install the latest Aranet Home app version:
* for iOS -
* for Android -
2. Launch the Aranet Home app.
3. Stay close to your Aranet sensor and press “+ ADD NEW DEVICE” button:
4. When the application discovers your Aranet sensor, press “+ PAIR” button:
5\. Press “ACCEPT” button when the system asks for permission:
6\. At this moment the Aranet sensor will show **6-digit number** on its screen. This is the PIN code you should enter into the application screen:
The PIN code containing 6 random digits will look like this:
Enter the PIN code in the pop-up window that appeared.
7\. In a few seconds, after you have entered the code, the Aranet sensor should be paired to your phone:
# Bluetooth and Pairing Issues
#### Why is Bluetooth pairing taking so long? Why didn’t I get a PIN request on my phone?
Bluetooth pairing usually takes about 10 to 15 seconds. If it takes more than 60 seconds or an error message appears on the screen of the device, the pairing process likely has crashed.
Access to the device’s location information is a general requirement from Android operating system developers for Bluetooth Low Energy applications to work correctly. [**Read more»**](https://developer.android.com/about/versions/marshmallow/android-6.0-changes#behavior-hardware-id)\
\
Try to restart your phone, reopen the app and repeat the pairing process. See this topic: [How to Pair with the Aranet Home app](/aranet4/aranet4-home/aranet-home-app/how-to-pair-with-the-aranet-home-app). The topic shows the pairing process, which is the same for all of the devices.
#### What would be the first things to try if the Aranet device is not pairing to the Aranet Home application on a mobile device?
Please first try:
1. Take out the batteries of the Aranet device.
2. Set jumper switch in the battery compartment for Bluetooth service in OFF (down) position, then back to ON (Up) position;
3. If you have the Aranet4 or Aranet2 Home device (Not Pro), then also make sure the 4th switch is in the OFF (down) position.
4. Put batteries in the correct polarisation again inside the Aranet (both batteries in the same direction with the + pole on the left side);
5. Uninstall the Aranet Home app completely and delete/forget the paired Aranet device from Bluetooth connected devices on the mobile device.
6. Restart the mobile device.
7. Install the application again and pair the Aranet device to the mobile device, not via the Bluetooth devices menu, but only via the Aranet Home application.
# Graphs
The Aranet Home app has a built-in graph visualisation. To access it you can press the graph button and then see the graphs. The graphs will then load, and you can switch between the length of time you want to see on the graph. As well as, at the bottom of the screen, between the different measurements of the device.
The radiation sensor graph looks a bit different. There are green, yellow and red areas which correspond normal/background, above background and health risk levels. The cumulative graph also shows these levels.
# Exporting Measurement Data
Here you can also export measurement data by pressing on the button at the top right (**MAKE SURE TO WAIT UNTIL ALL DATA IS GATHERED, OR YOU WILL HAVE HOLES IN YOUR DATA)**\
You can choose to download in a .csv or a .xlsx format, and for a lot of different time intervals.\
The time format of the downloaded file is the same as the one in the app settings.
# Background Data Read
Background data read is an option in the Aranet Home settings, that, when enabled, will enable the Aranet Home App on a periodic basis (once every few hours) to read data from paired Aranet devices. The devices must be within range of the phone/tablet running the Aranet Home App.
The data is then stored locally on the Aranet Home app (90 days of data storage per device).
# Coloured Thresholds
Starting from Aranet Home app version v2.0.4 it is possible to change colour indication threshold levels for the measurements.\
In the example below, it is done for CO₂ measurements.
From the Aranet Home application, it is possible to change the value for both yellow and red threshold levels of the Aranet4 device in the range of 300 to 2000 ppm.
To configure these levels in the Aranet4 application, please:
1. Click on the settings “wheel” icon in the record of the necessary Aranet4 device;
2. In the newly opened page, click on the section **CO₂ indication mode**.
3. Select **Custom** indication mode.
4. Set the Yellow threshold value as necessary.
5. Set the Red threshold value as necessary.
6. Save settings by pressing on **APPLY CHANGES** button.
7. In case new threshold levels were successfully configured, then the Aranet4 application will show a success message: **CO₂ indication mode changed**.
The colour indication threshold level changing was not possible with application versions up to v1.20.\
By default, the CO₂ measurement colour indication threshold levels were as follows:\
Green – below 1000 ppm\
Yellow – 1000 - 1400 ppm\
Red – above 1400 ppm\
\
For Temperature:
Too High (red) — >26°C (78.8°F)\
Normal (green) — 20°C — 26°C (68.0 - 78.8°F)\
Too low (blue) — <20°C (68.0°F)
For RH:
Too High (red) — 70% RH\
Normal (green) — 30% RH — 70% RH\
Too low (blue) — 30% RH
For Radiation:
Green – below 0.20 μSv/h\
Yellow – 0.20 μSv/h — 10.0 μSv/h\
Red – above 10.0 μSv/h
For Radon:
Green – below 100 Bq/m3\
Yellow – 100 Bq/m3 — 300 Bq/m3\
Red – above 300 Bq/m3
# Notification and Buzzer Settings
#### Push notifications
Starting from Aranet Home App v3.8.2, push notifications can be enabled in the Aranet Home app settings. (Works better with background data read enabled)\
You will get periodic notifications if any of the sensors move past their configured thresholds.
#### Buzzer
The buzzer is an audio alarm built into all of the Aranet devices. When the buzzer is enabled (switched on), the "speaker" icon is visible on the Aranet display. It can be enabled behind the batteries as the second switch and in the Aranet Home app:
To access Aranet buzzer settings, open the Aranet Home app:
1. Navigate to sensor settings by pressing the "gear" icon;
2. Click on "Buzzer" to open the drop-down menu;
3. Select the desired buzzer mode;
4. After the mode change confirmation, exit sensor settings.
# Fullscreen Display on a Smart TV
#### How to display the Aranet Home application data in full-screen mode from iOS Apple devices to Apple TV?
Once the Aranet sensor is paired to the Aranet Home application on the iOS mobile device, you can display the measurement data from the sensor in full-screen mode on the app. This can be done in the following way:
1\. Click on the collapsed menu icon in the top right corner of the application main page;
2\. Click on the section **Fullscreen mode**;
3\. Select **Dark theme** or **Light theme** for the fullscreen mode;
4\. Go back to the application main page and click on the Fullscreen icon;
5\. Rotate the mobile device itself to landscape mode.
When the app is in fullscreen mode, you can mirror its screen to Apple TV:
6\. Swiping from the top right corner of the mobile device screen opens the iOS Control Centre menu and clicking on the **Screen Mirroring** icon;
7\. Wait for the mobile device to find **Apple TV** and then click on its record to see data from the Aranet4 application on the Apple TV.
#### How to display Aranet Home application data in fullscreen mode from Android devices to Smart TV?
To replicate information from any Android device to a Smart TV, both devices should support Miracast or Screen Mirroring functionality (also called HDMI over Wi-Fi).
If you have both devices compatible with Miracast, then once the Aranet4 sensor is paired to the Aranet4 application on the Android mobile device, you can display the measurement data from the sensor in full-screen mode on the app. This can be done in the following way:
1\. Click on the collapsed menu icon in the top right corner of the application main page;
2\. Click on the section **Fullscreen mode**;
3\. Select **Dark theme** or **Light theme** for the fullscreen mode;
4\. Go back to the application main page and click on the Fullscreen icon;
5\. Rotate the mobile device itself to landscape mode and now You can mirror its screen to Smart TV;
6\. Swiping from the top edge of the mobile device screen open the Android Control Panel, find the **Screen Cast** icon and click on it;
7\. Wait for the mobile device to find the Smart TV and then click on its record to see data from the Aranet4 application on the Smart TV:
# Maintenance and Safety
This page explains recommended maintenance procedures, battery handling guidelines, and safety considerations for proper device operation.
# Handling and Cleaning
The Aranet devices are advanced electronic device in a plastic case. You should handle and clean it the same way you deal with other household electronic devices.
#### Handling
* Aranet devices are not impact-resistant; do not drop or hit it.
* Aranet devices are not waterproof; do not use it in high humidity environments (greater than 85%).
* Do not leave Aranet devices in direct sunlight. This can damage the E-ink screen
* Do not expose Aranet devices to strong electromagnetic fields.
* Aranet devices are intended for use at temperatures 0 °C to 50 °C (32 °F to 122 °F). Exposure to lower temperatures can damage the device.
#### Cleaning
You can clean your Aranet device with lukewarm water and mild soap. Mix some soap and water in a bucket, clean the case using a slightly wet soft sponge or microfiber cloth to avoid scratching the material and water drops entering the case. Make sure your detergent has no harsh chemicals that could damage the plastic and sensor, such as white spirits or Clorox.
#### Disinfecting
Alcohol solutions (alcohol / purified water) or wipes with at least 70 per cent alcohol are effective for the sanitization of the Aranet case. First, clean the surface with soap and water as described above. Apply the alcohol solution and let it sit on the surface for at least 30 seconds to disinfect. Wipe dry with a clean cloth.
You can use low-power household UV-disinfectors for Aranet4 disinfection, too. Follow the UV-disinfector instructions and do not overexpose Aranet4 to UV radiation.
# FAQ
This page explains common questions and answers related to Aranet Radon Plus functionality, configuration, and troubleshooting.
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.
# Aranet Radon One
The **Aranet Radon One** is a compact wireless temperature and humidity sensor designed for flexible environmental monitoring applications. It delivers precise measurements and seamless integration with the Aranet ecosystem for centralized data collection and analysis. This section provides detailed information on device specifications, setup procedures, usage recommendations, and maintenance guidance.
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[General](/aranet-rn-one/aranet-radon-one/general)
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[Documents and Firmware](/aranet-rn-one/aranet-radon-one/documents-and-firmware)
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[Usage and Measurements](/aranet-rn-one/aranet-radon-one/usage-and-measurements)
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[Aranet Home App](/aranet-rn-one/aranet-radon-one/aranet-home-app)
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[Maintenance and Safety](/aranet-rn-one/aranet-radon-one/maintenance-and-safety)
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[FAQ](/aranet-rn-one/aranet-radon-one/faq)
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# General
This page explains the main features and functionality of the Aranet Radon One device, including its measurements, display indicators, and basic operating principles.
# What Does the Aranet Rn One Do?
The Aranet One Provides real-time measurements of radon gas
concentration. With its portability and extended
multi-year battery life, this device ensures convenience
and reliability in continuous indoor air quality monitoring.
This sensor, belonging to the Home sensor series, is
intended to be used together with the Aranet Home
mobile application for extended data browsing
capabilities.
#### What Does Aranet Radon One
Measure?
#### Radon Gas
Radon gas is tasteless, odourless, and hard to detect, posing serious health risks. It escapes
from the ground into the air and can accumulate in your home. According to the
[World Health Organisation](https://www.who.int/news-room/fact-sheets/detail/radon-and-health), radon is one of the leading causes of lung cancer.
Since its levels can fluctuate, regular radon monitoring is vital.
Aranet Radon One sensor offers real-time radon monitoring. It is the fastest sensor
on the market – offering first measurements already after 10 minutes and refined
measurements after 1h. The e-ink display and long battery life make it ideal for
continuous indoor air quality monitoring.
# Device Lifespan
The battery life of two AA batteries that the device uses is dependent on some conditions. See the table below:
#### Waste of electronics
Waste batteries and electronic equipment must be taken to household hazardous waste collection points! You may search the internet for the closest collection point in the area you are located.
**Never** put these items in household garbage or recycling bins!
**Do not expose** the batteries to fire! Do not dismantle them!
Waste of batteries and electronic equipment can contain substances and materials that can harm the environment and living beings, if treated as regular household waste.
# Power Options
The Aranet Radon one sensor runs on standard AA batteries. Out-of-the-box, it uses **two AA batteries**, which — thanks to its power-efficient e-ink display and smart power management — can last for a few years and potentially much longer if data updates are infrequent.
# Documents and Firmware
This page explains how to access product documentation, download firmware updates, and maintain the latest device software version.
# Documents
**Datasheet:**
[Aranet Radon One Datasheet](https://assets.aranet.com/documents/Aranet_Datasheet_TDSPSRH4_Radon_One_sensor_HOME_1.pdf)
**Quick start guide:**
[Aranet Radon One Quick Start Guide ](https://assets.aranet.com/documents/Aranet_Radon_One_sensor_QSG_ENG_WEB_v031025_zDc2euV.pdf)
# Firmware Changelog
Aranet Radon One
v1.15.24 - Jun 18 2026
Improved radon concentration calculation algorithm.
v1.11.3 - initial firmware
# How to Update Firmware
Starting from Aranet Home app version v2.0 firmware update can be done as follows:
1. Click on the settings “wheel” icon in the record of the necessary device;
2. In the newly opened page click on section **Firmware**;
3. Finally click on the button **START UPDATE**:
**Important!** Sometimes there might be an issue where the sensor is stuck during some operation, for example, a firmware upgrade. In this case, it is advised to open the Aranet4 app and try to add a new sensor. In most cases, this sensor will be discovered, paired back to the app and working again. If the issue still persists, please contact
# Stuck in Firmware Upgrade Mode
If your Aranet device gets stuck in firmware update, then follow these steps:\
NOTE: This only works from the Aranet Home app v3.4.2. As such, you should update your app before trying this.
1. Remove batteries and place them back after a few minutes.
2. Do “PAIR NEW DEVICE” from the application settings menu – the app will find the failed Aranet4 device and will start firmware recovery
# Usage and Measurements
This page explains how Aranet Radon One performs measurements, including sensor behavior, data interpretation, and measurement intervals.
# Data Storage
Radon One Sensor is compatible with smart devices conforming to Bluetooth specification 4.1 and up.
\
Bluetooth is utilized to enable the functionality of the Aranet Home mobile application. When transferring data to
Aranet Home, **device memory provides 30 days historic data availability**.
# Default Settings
The Aranet Radon One sensor is calibrated in the factory, and it works instantly when it you take it out of the box and insert the batteries – no additional setup is needed. These are the default settings of the Aranet Radon One sensor:
1. The default radon measurement units are set to Bq/m3;
2. Bluetooth connection is enabled;
3. Bluetooth connection transmission range is set to normal;
4. The buzzer for audio sound alarm notifications is disabled;
# Where to Place the Device in a Room
For accurate readings, the **Aranet Radon One sensor** should be placed where radon is most likely to accumulate and where people actually spend time. In homes, this is typically the **lowest regularly occupied level** (such as a basement or ground floor). Position the device **0.8–2 meters (2.5–6.5 ft)** above the floor, in an open area with normal air circulation. Avoid placing it near windows, doors, ventilation outlets, or exterior walls, as drafts and fresh air can dilute radon levels and distort measurements. Do not place the sensor in kitchens, bathrooms, or directly next to heat sources or electronic devices. A stable, central location away from direct sunlight will provide the most representative long-term radon measurements.
The Aranet Radon One sensor should not be placed in direct sunlight or in areas with a risk of splashing the sensor with different liquids, or high-humidity environments (higher than 85%), such as your bathroom. Place the sensor in a safe place where it cannot accidentally be dropped because it isn’t drop-proof.
# Aranet Home App
This page explains how to connect Aranet Home sensors to the Aranet Home mobile application, including pairing procedures and available app features.
# Aranet Home App Overview
The Aranet Home app is the companion mobile app for Aranet’s indoor-environment sensors (like Aranet4, Aranet2, Aranet Rn+, Aranet Radon One and Aranet Radiation sensor devices).
Compatible with both iOS (iPhone / iPad) and Android.
Using the app, you get a convenient hub for monitoring, configuring, and analysing data from your sensors. Key features:
* **Real-time readings** — view current measurements (CO₂, temperature, humidity, atmospheric pressure, and more, depending on the device).
* **Measurement history & data storage** — you can store past measurements (history) and review data over time. The app supports up to **90 days** of history (depending on the device and its settings).
* **Customizable measurement intervals** — you can set how often the sensor measures and sends data: 1, 2, 5, or 10 minutes.
* **Charts & data visualisation** — the app turns raw sensor data into easy-to-read charts and colour-coded visuals, so you can spot trends (like CO₂ spikes, humidity swings, etc.) over time.
* **Export data** — you can export stored data (e.g. CSV or XLSX), which is useful if you want to analyze data elsewhere or keep long-term logs.
* **Device configuration & management** — you can pair/unpair devices, update firmware, adjust sensor settings (e.g. measurement frequency, CO₂ threshold levels, buzzer/alert settings), rename devices, etc.
* **Widgets** — on supported mobile devices you can add app widgets for quick-glance values without opening the full app.
* **Smart alerts / Notifications** — the app can notify you when certain thresholds are exceeded (e.g. CO₂ levels go into “unhealthy” range) or if the battery is low (for battery-powered devices).
Also, the app supports multiple languages (English, German, French, Latvian, and more).
# How to Pair With the Aranet Home App
1. Download and install the latest Aranet Home app version:
* for iOS -
* for Android -
2. Launch the Aranet Home app.
3. Stay close to your Aranet sensor and press “+ ADD NEW DEVICE” button:
4. When the application discovers your Aranet sensor, press “+ PAIR” button:
5\. Press “ACCEPT” button when the system asks for permission:
6\. At this moment the Aranet sensor will show **6-digit number** on its screen. This is the PIN code you should enter into the application screen:
The PIN code containing 6 random digits will look like this:
Enter the PIN code in the pop-up window that appeared.
7\. In a few seconds, after you have entered the code, the Aranet sensor should be paired to your phone:
# Bluetooth and Pairing Issues
#### Why is Bluetooth pairing taking so long? Why didn’t I get a PIN request on my phone?
Bluetooth pairing usually takes about 10 to 15 seconds. If it takes more than 60 seconds or an error message appears on the screen of the device, the pairing process likely has crashed.
Access to the device’s location information is a general requirement from Android operating system developers for Bluetooth Low Energy applications to work correctly. [**Read more»**](https://developer.android.com/about/versions/marshmallow/android-6.0-changes#behavior-hardware-id)\
\
Try to restart your phone, reopen the app and repeat the pairing process. See the video [**How to Pair Aranet4 with a Smartphone App**](https://www.youtube.com/watch?v=ER2b9mDPx10)**.** The video shows an Aranet4, but the pairing process is the same for all of the devices.
#### What would be the first things to try if the Aranet device is not pairing to the Aranet Home application on a mobile device?
Please first try:
1. Take out the batteries of the Aranet device for atleast 15 minutes
2. Put batteries in the correct polarisation again inside the Aranet device.
3. Uninstall the Aranet Home app completely and delete/forget the paired Aranet device from Bluetooth connected devices on the mobile device.
4. Restart the mobile device.
5. Install the application again and pair the Aranet device to the mobile device, not via the Bluetooth devices menu, but only via the Aranet Home application.
# Measurement Units
The Aranet device units can be changed in the Aranet Home App settings. The settings here are only used for the displayed units in the app. If you want to change the units on the E-Ink display, then you can do that at the back of the device behind the batteries. The 1st switch changes the units.\
For the Aranet4 and Aranet2, it changes the Temperature unit, and for the Radiation sensor changes the Radiation unit. As the Pressure measurements are only available in the app, those units can only be changed here.
The Radon sensors, you can either change the units from the device settings in the app, or using the buttons or the wheel on the side of the sensor.
# Graphs
The Aranet Home app has a built-in graph visualisation. To access it you can press the graph button and then see the graphs. The graphs will then load, and you can switch between the length of time you want to see on the graph. As well as, at the bottom of the screen, between the different measurements of the device.
The radiation sensor graph looks a bit different. There are green, yellow and red areas which correspond normal/background, above background and health risk levels. The cumulative graph also shows these levels.
# Exporting Measurement Data
Here you can also export measurement data by pressing on the button at the top right (**MAKE SURE TO WAIT UNTIL ALL DATA IS GATHERED, OR YOU WILL HAVE HOLES IN YOUR DATA)**\
You can choose to download in a .csv or a .xlsx format, and for a lot of different time intervals.\
The time format of the downloaded file is the same as the one in the app settings.
# Background Data Read
Background data read is an option in the Aranet Home settings, that, when enabled, will enable the Aranet Home App on a periodic basis (once every few hours) to read data from paired Aranet devices. The devices must be within range of the phone/tablet running the Aranet Home App.
The data is then stored locally on the Aranet Home app (90 days of data storage per device).
# Coloured Thresholds
Starting from Aranet Home app version v2.0.4 it is possible to change colour indication threshold levels for the measurements.\
In the example below, it is done for CO₂ measurements.
From the Aranet Home application, it is possible to change the value for both yellow and red threshold levels of the Aranet4 device in the range of 300 to 2000 ppm.
To configure these levels in the Aranet4 application, please:
1. Click on the settings “wheel” icon in the record of the necessary Aranet4 device;
2. In the newly opened page, click on the section **CO₂ indication mode**.
3. Select **Custom** indication mode.
4. Set the Yellow threshold value as necessary.
5. Set the Red threshold value as necessary.
6. Save settings by pressing on **APPLY CHANGES** button.
7. In case new threshold levels were successfully configured, then the Aranet4 application will show a success message: **CO₂ indication mode changed**.
The colour indication threshold level changing was not possible with application versions up to v1.20.\
By default, the CO₂ measurement colour indication threshold levels were as follows:\
Green – below 1000 ppm\
Yellow – 1000 - 1400 ppm\
Red – above 1400 ppm\
\
For Temperature:
Too High (red) — >26°C (78.8°F)\
Normal (green) — 20°C — 26°C (68.0 - 78.8°F)\
Too low (blue) — <20°C (68.0°F)
For RH:
Too High (red) — 70% RH\
Normal (green) — 30% RH — 70% RH\
Too low (blue) — 30% RH
For Radiation:
Green – below 0.20 μSv/h\
Yellow – 0.20 μSv/h — 10.0 μSv/h\
Red – above 10.0 μSv/h
For Radon:
Green – below 100 Bq/m3\
Yellow – 100 Bq/m3 — 300 Bq/m3\
Red – above 300 Bq/m3
# Notification and Buzzer Settings
#### Push notifications
Starting from Aranet Home App v3.8.2, push notifications can be enabled in the Aranet Home app settings. (Works better with background data read enabled)\
You will get periodic notifications if any of the sensors move past their configured thresholds.
#### Buzzer
The buzzer is an audio alarm built into all of the Aranet devices. When the buzzer is enabled (switched on), the "speaker" icon is visible on the Aranet display. It can be enabled behind the batteries as the second switch and in the Aranet Home app:
To access Aranet buzzer settings, open the Aranet Home app:
1. Navigate to sensor settings by pressing the "gear" icon;
2. Click on "Buzzer" to open the drop-down menu;
3. Select the desired buzzer mode;
4. After the mode change confirmation, exit sensor settings.
# Fullscreen Display on a Smart TV
#### How to display the Aranet Home application data in full-screen mode from iOS Apple devices to Apple TV?
Once the Aranet sensor is paired to the Aranet Home application on the iOS mobile device, you can display the measurement data from the sensor in full-screen mode on the app. This can be done in the following way:
1\. Click on the collapsed menu icon in the top right corner of the application main page;
2\. Click on the section **Fullscreen mode**;
3\. Select **Dark theme** or **Light theme** for the fullscreen mode;
4\. Go back to the application main page and click on the Fullscreen icon;
5\. Rotate the mobile device itself to landscape mode.
When the app is in fullscreen mode, you can mirror its screen to Apple TV:
6\. Swiping from the top right corner of the mobile device screen opens the iOS Control Centre menu and clicking on the **Screen Mirroring** icon;
7\. Wait for the mobile device to find **Apple TV** and then click on its record to see data from the Aranet4 application on the Apple TV.
#### How to display Aranet Home application data in fullscreen mode from Android devices to Smart TV?
To replicate information from any Android device to a Smart TV, both devices should support Miracast or Screen Mirroring functionality (also called HDMI over Wi-Fi).
If you have both devices compatible with Miracast, then once the Aranet4 sensor is paired to the Aranet4 application on the Android mobile device, you can display the measurement data from the sensor in full-screen mode on the app. This can be done in the following way:
1\. Click on the collapsed menu icon in the top right corner of the application main page;
2\. Click on the section **Fullscreen mode**;
3\. Select **Dark theme** or **Light theme** for the fullscreen mode;
4\. Go back to the application main page and click on the Fullscreen icon;
5\. Rotate the mobile device itself to landscape mode and now You can mirror its screen to Smart TV;
6\. Swiping from the top edge of the mobile device screen open the Android Control Panel, find the **Screen Cast** icon and click on it;
7\. Wait for the mobile device to find the Smart TV and then click on its record to see data from the Aranet4 application on the Smart TV:
# Maintenance and Safety
This page explains recommended maintenance procedures, battery handling guidelines, and safety considerations for proper device operation.
# Handling and Cleaning
The Aranet devices are advanced electronic device in a plastic case. You should handle and clean it the same way you deal with other household electronic devices.
#### Handling
* Aranet devices are not impact-resistant; do not drop or hit it.
* Aranet devices are not waterproof; do not use it in high humidity environments (greater than 85%).
* Do not leave Aranet devices in direct sunlight. This can damage the E-ink screen
* Do not expose Aranet devices to strong electromagnetic fields.
* Aranet devices are intended for use at temperatures 0 °C to 50 °C (32 °F to 122 °F). Exposure to lower temperatures can damage the device.
#### Cleaning
You can clean your Aranet device with lukewarm water and mild soap. Mix some soap and water in a bucket, clean the case using a slightly wet soft sponge or microfiber cloth to avoid scratching the material and water drops entering the case. Make sure your detergent has no harsh chemicals that could damage the plastic and sensor, such as white spirits or Clorox.
#### Disinfecting
Alcohol solutions (alcohol / purified water) or wipes with at least 70 per cent alcohol are effective for the sanitization of the Aranet case. First, clean the surface with soap and water as described above. Apply the alcohol solution and let it sit on the surface for at least 30 seconds to disinfect. Wipe dry with a clean cloth.
You can use low-power household UV-disinfectors for Aranet4 disinfection, too. Follow the UV-disinfector instructions and do not overexpose Aranet4 to UV radiation.
# FAQ
This page explains common questions and answers related to Aranet Radon One functionality, configuration, and troubleshooting.
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.
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%).
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/)
# Aranet Radiation sensor
The **Aranet Radiation Sensor** is designed to measure solar radiation levels for agricultural, environmental, and research applications. It provides accurate radiation data to support climate monitoring and crop management decisions. This section includes technical specifications, installation guidelines, configuration procedures, and operational recommendations to ensure precise and reliable measurements.
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[Maintenance and Safety](/aranet-radiation-sensor/aranet-radiation-sensor/maintenance-and-safety)
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[FAQ](/aranet-radiation-sensor/aranet-radiation-sensor/faq)
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# General
This page explains the main features and functionality of the Aranet Radiation device, including its measurements, display indicators, and basic operating principles.
# What Does the Aranet Radiation Sensor Do?
The Aranet Radiation Sensor is designed to
Keep your mind calm! Monitor dangerous
levels of ionising radiation (γ, β) to be aware of
and follow your total dose of exposure
anywhere you go. Battery life up to 4 years
provides continuous measurements with
wireless access to your radiation exposure
history through the Aranet Home app
#### What does Aranet Radiation
measure?
#### Dose Rate
It describes how strong the ionizing radiation (γ, β) is at a given
moment. It is expressed in microsieverts per hour (µSv/h) or
millirems per hour (mrem/h).
If radiation levels rise, the device uses colors (green, yellow, and red)
to alert you, dimming the screen for high values (red level). The
default threshold levels are based on scientific recommendations 1-4,
but you can adjust them as needed through the Aranet Home app.
#### Total Dose
Total dose of ionizing radiation (γ, β) encountered during the integration time is
expressed in millisieverts (mSv) or rems (rem). Total dose of ionizing
radiation is a critical metric for ensuring environmental safety and
personal health. If the average rate at which the total dose has been
acquired exceeds 0.20 μSv/h, then the upper part of the screen will be
dimmed.
This reading can be reset from the Aranet Home app or by pushing the
mechanical button behind the battery compartment lid. To perform a
reset, press and hold the button for 5 seconds.
Scientific recommendations:
1.
2.
3.
4.
# Device Lifespan
The battery life of the two AA batteries that the device uses is dependent on some conditions. See the table below:
#### Waste of electronics
Waste batteries and electronic equipment must be taken to household hazardous waste collection points! You may search the internet for the closest collection point in the area you are located.
**Never** put these items in household garbage or recycling bins!
**Do not expose** the batteries to fire! Do not dismantle them!
Waste of batteries and electronic equipment can contain substances and materials that can harm the environment and living beings, if treated as regular household waste.
# Power Options
The Aranet Radiation sensor runs on standard AA batteries. Out-of-the-box, it uses **two AA batteries**, which — thanks to its power-efficient e-ink display and smart power management — can last for a few years and potentially much longer if data updates are infrequent.
# Documents and Firmware
This page explains how to access product documentation, download firmware updates, and maintain the latest device software version.
# Documents
**The quick start guide**:
[Aranet Radiation Sensor Quick Start Guide](https://assets.aranet.com/documents/Aranet_Radiation_sensor_QSG_v160725.pdf)
**Datasheet:**
[Aranet Radiation Sensor Datasheet](https://assets.aranet.com/documents/Aranet_Datasheet_TDSNUCH1_Radiation_sensor_HOME_Qd1jGGX.pdf)
**Leaflet:**
[Aranet Radiation Sensor Leaflet](https://assets.aranet.com/documents/Aranet_Radiation_Sensor_Leaflet_230924_h6EcwFT.pdf)
# Firmware Changelog
Aranet Radiation
v1.9.1:
* Improved display driver stability.
* Improved new battery detection in low battery state. GUI:
* Added "cumulative dose over measurable range" indication.
* Added sensor ID on pairing screen.
* Improved icons.
\
v1.4.42:
* Introduction of unreliable measurement data improvement progress bar
* Dynamic moving average calculation improvements
* Stability improvements
v1.4.38 - initial firmware
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