Modern smartphones Samsung based Android equipped with dozens of sensors, but not all users know that some models can measure temperature - not only of internal components, but also of the surrounding environment. This function becomes especially useful in extreme situations: when you need to check the overheating of a gadget after playing games, diagnose a battery malfunction, or even roughly estimate the air temperature in the room without a thermometer.

In this article we will examine 5 working methods temperature measurements using a phone Samsung - from built-in tools to third-party applications with advanced capabilities. You'll learn which models support this feature out of the box, how to interpret sensor readings, and why the readings may differ from professional thermometers. And also - we will reveal the secret code to access hidden engineering menus, which display the real values ​​of the temperature of the processor and battery.

Important: the accuracy of measurements depends on the phone model, firmware version and even operating conditions. For example, the air temperature sensor in Galaxy S22 Ultra will show some values, and in Galaxy A13 it will show completely different values, even if both devices are in the same room. We will explain why this happens and how to minimize the error.

1. Built-in temperature sensors: what Samsung smartphones can do

Most flagship and some mid-budget models Samsung equipped thermal sensorsthat monitor:

  • 🔥 CPU temperature (CPU) - a critical parameter to prevent throttling (reduced performance due to overheating).
  • 🔋 Battery temperature - affects the charging speed and battery life.
  • 🌡️ Ambient temperature (not available on all models, requires separate sensor).

To check if your phone has an ambient temperature sensor, follow this simple step:

  1. Open the application Phone.
  2. Enter the combination #0# (as for the display test).
  3. If the item Sensor or Temperature appears in the menu, your smartphone supports measurement.

For example, in Galaxy S21+ and newer the ambient temperature sensor is built into the camera module, and in budget series Galaxy A (until 2022) it is often absent. You can check the availability of the sensor in the technical specifications of the model on the official website Samsung.

📊 What Samsung smartphone do you have?
Galaxy S series
Galaxy A series
Galaxy Note
Galaxy Z (folding)
Other

2. How to see the temperature of the processor and battery without applications

If you urgently need to find out if the phone is overheating, it is not necessary to install third-party utilities. In Android there are hidden tools for monitoring temperature:

Method 1: Engineering menu (Secret Codes)

Enter in the application Phone one of these codes (depending on the model):

##4636##  → Battery information

*#0228# → Battery status (temperature, voltage)


*#9900# → SysDump (advanced diagnostics)

After entering the code ##4636## select Battery information - there will be a line Temperature (in degrees Celsius). Normal values: Battery information (it is recommended to turn off the device).

  • 🟢 25–40°C — optimal mode.
  • 🟡 40–45°C — slight overheating (possible throttling).
  • 🔴 Above 45°C — critical overheating (it is recommended to turn off the device).

Method 2: Developer Menu

Activate Developer mode (go to Settings → About phone → Build number, tap 7 times). Then:

  1. Return to Settings → System → Developer mode.
  2. Find item CPU temperature or CPU monitor.
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If the engineering menu does not open, try entering codes without a symbol at the end (for example, #0228# instead #0228#). On some firmware, this solves the problem.

3. Applications for measuring temperature: TOP 5 utilities for Samsung

Third-party applications offer a more convenient interface and advanced functions, for example, temperature change graphs or overheating notifications. We tested dozens of utilities and selected the best:

Application Functions Samsung support Link (Google Play)
CPU Monitor CPU/GPU temperature, frequency, core load ✅ All models Download
AIDA64 Full diagnostics (temperature, sensors, iron) ✅ All models Download
Cool Tool Temperature of battery, CPU, environment (if there is a sensor) ✅ Flagships (S/Note/Z) Download
Thermal Monitor Overheating notifications, change history ✅ Most models Download
Galaxy Labs Official Samsung application for diagnostics ✅ Only for Galaxy Preinstalled

Recommendation: For accurate monitoring, use AIDA64 —it shows the temperature of all processor cores, graphics accelerator and even the 5G module (if available). But Cool Tool is suitable for a quick battery check.

Close all background applications|

Turn off your mobile phones. data/Wi-Fi|

Remove the case|

Place the device in the shade|

Restart the phone-->

4. How to measure the air temperature with a Samsung phone

Not all smartphones Samsung can measure the ambient temperature - this depends on the presence of a separate sensor (usually built into the camera module or accelerometer). You can check its presence like this:

Step 1: Install the application Sensor Box for Android (or similar, for example, AndroSensor).

Step 2: Open the tab Temperature (Temperature). If there is a sensor, you will see readings in degrees Celsius.

Step 3: Compare the data with a regular thermometer. The error may reach ±3–5°C, especially if the phone was in the sun or in your pocket.

Important: The following models have an ambient temperature sensor (but are not limited to them):

  • 📱 Galaxy S20 Ultra, S21 Ultra, S22 Ultra, S23 Ultra
  • 📱 Galaxy Note 20 Ultra, Note 10+
  • 📱 Galaxy Z Fold 3/4, Z Flip 3/4

In budget series (Galaxy A13, A23, A52 and older) this sensor is usually absent. It can also be disabled at the firmware level - for example, in some regional versions Galaxy S22.

Why are the phone readings different from the thermometer?

Sensor in the smartphone is located close to heating components (processor, battery), so it can increase the temperature by 2–7°C. In addition, correct measurements are only possible if the phone has been left at rest for at least 10 minutes.

5. Samsung hidden functions: engineering menu and diagnostics

For advanced users who want to get it maximum accurate data, there is access to hidden diagnostic menus. These tools are used by service centers, but you can launch them yourself.

Method 1: ServiceMode menu (general test)

  1. Open the application Phone.
  2. Enter *#0011# —a menu will open ServiceMode.
  3. Go to the tab Battery Info or Thermal.

Method 2: Diagnostics via USB (for PC)

Connect your phone to the computer, install Samsung USB Drivers and use the app Samsung Phone INFO (available on XDA DevelopersIt will show:

  • 🔥 Temperature of each processor core (Exynos/Snapdragon).
  • 🔋 Battery temperature accurate to 0.1°C.
  • 🌡️ Data from the environmental sensor (if available).
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Engineering menus may vary depending on regional firmware. For example, in European versions Galaxy S23 the code *#9900# works, but in American (SM-S911U) it does not.

6. Errors and errors: why the phone shows the wrong temperature

Even if you use professional applications, readings may be inaccurate. Here are 4 main reasons errors:

  1. External factors: The phone got hot in the sun, was lying next to a heating battery or in a case. The sensors record own the temperature, not the ambient temperature. environment.
  2. Sensor quality: Budget models use cheap sensors with an error of up to ±10°C.
  3. Firmware: Some shells (for example, One UI in older versions) artificially lower the processor temperature readings.
  4. Background processes: If games or video rendering are running at the time of measurement, the CPU heats up, distorting the data.

How to minimize the error?

  • 📵 Turn off mobile data and Wi-Fi before measurement.
  • ❄️ Place the phone in the shade for 15-20 minutes.
  • 🔄 Use 2-3 applications at the same time and take the average value.
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If you need maximum accuracy, calibrate the sensors using a professional thermometer. To do this, compare the readings of the phone and the standard for 5-10 minutes, then make an adjustment in the application settings (if there is such a function).

7. When measuring the temperature of the phone can save the gadget

Regular temperature monitoring helps. prevent serious damage:

  • 🔋 Battery swelling: If the battery is constantly heated above 45°C, its service life is reduced by 2-3 times. At temperatures >60°C, the risk of swelling or fire increases sharply.
  • 🖥️ CPU throttling: When the CPU overheats, it automatically reduces the frequency, which leads to lags in games and applications.
  • 📱 Module failure cameras: In Galaxy S22 Ultra and newer, overheating can cause an error "Warning: Camera failed".

Critical symptoms in which you urgently need to cool the phone:

  • 🚨 The screen spontaneously dims or turns off.
  • 🚨 The phone turns off when charging.
  • 🚨 The case is so hot that it unpleasant to hold in your hands.

If you notice at least one of these signs, immediately:

  1. Turn off the power (remove the charging cable).
  2. Put the phone into Airplane mode.
  3. Place it on cooling pad or in a cool place (but not in the refrigerator!).
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The Galaxy Note 20 Ultra i S21+ has built-in protection: if the battery temperature is >50°C, the phone automatically turns off until it cools down to 30–35°C!

FAQ: Frequently asked questions about temperature measurement on Samsung

❓ Is it possible to measure a person’s body temperature with a Samsung phone?

No, smartphones are not intended for medical measurements. The sensors in the phone do not have the necessary accuracy and certification. To measure body temperature, use only specialized thermometers (contact or non-contact).

❓ Why is there no ambient temperature sensor, but there is one? Galaxy A53 there is no ambient temperature sensor, and in S22 Ultra There is?

It depends on the hardware. Flagship models are equipped with additional sensors (for example, to improve the performance of the camera or cooling systems), while budget series are deprived of them to save money. In Galaxy A usually there are only battery and processor temperature sensors.

❓ How to reset temperature sensor data?

Temperature sensors are physical components; their readings cannot be “reset” programmatically. However, you can reset the cache of system applications responsible for monitoring:

  1. Go to Settings → Applications.
  2. Find Device Health Services or Samsung Members.
  3. Click Storage → Clear cache.

This will not change the actual temperature, but may eliminate display errors in some applications.

❓ Can a virus affect the temperature readings?

No, viruses cannot physically change the temperature of components. However, malware can:

  • Load the processor with background tasks (which is what happens). will lead to real heating).
  • Substitute data in monitoring applications (for example, show deliberately false values).

If you suspect a virus, scan your phone via Malwarebytes or Dr.Web.

❓ Where in Galaxy Z Flip 4 is there an air temperature sensor?

In folding models Galaxy Z Flip 4 i Z Fold 4 the ambient temperature sensor is built into top camera module (next to the main lens. It is used not only for measurements, but also for correcting the white balance when shooting in different locations). lighting conditions.

Now you know how to turn your Samsung into a multifunctional thermometer - from diagnosing overheating to approximately measuring the temperature in the room. Remember that accuracy depends on the modeland for critical tasks (for example, medical measurements) it is better to use specialized devices. the phone regularly overheats for no apparent reason - this is a reason to check it at a service center.