A modern smartphone is a complex high-tech computing device that is more powerful than thousands on-board computers, who launched Apollo to the Moon half a century ago. Sensors on board flagship mobile phones also installed almost more than on board this very Apollo. Each of them quietly but conscientiously performs their work. What do all these smartphone sensors do and how do they work? Read on for more details.
The light sensor in a smartphone is located on the front panel, usually near the earpiece (there are exceptions). Structurally, it is a semiconductor sensor sensitive to photon flux. Depending on its intensity, the sensor controls the display backlight in order to use battery power more efficiently. It can also perform an auxiliary function for other tasks by working with a proximity sensor.
Proximity sensor
This is an optical or ultrasonic sensor that determines whether there are objects in front of the screen. It sends a very weak light or sound pulse, and if it is reflected, it registers the reflected signal. Due to this, the screen is automatically locked during a call or when the smartphone is turned over with the display down. Traditionally, the proximity sensor is calibrated in such a way that it registers only 2 states: “a foreign object is closer than N (usually 5) centimeters” and “a foreign object is further than N cm”.
Accelerometer
This smartphone sensor is located on a circuit board and is a miniature electromechanical device that records the slightest movements. The responsibilities of this sensor include switching the orientation of the smartphone screen when tilted, controlling games, registering special control gestures (such as shaking or tapping the body), and also measuring steps (by counting rhythmic vibrations during walking).
A regular dual-axis accelerometer in a smartphone
There are two-axis and three-axis accelerometers. A feature of the accelerometer is that at rest, one of the axes will always show a value in the region of 9-10 m/s 2 (in a three-axis three-dimensional accelerometer). This is due to the fact that the Earth's gravity is on average 9.8 m/s 2 .
Gyroscope
The gyroscope is responsible for determining the movement and orientation of the smartphone in space. It also structurally represents a MEMS (microelectromechanical circuit) located on system board. Its areas of application overlap with those of the accelerometer. The main differences are that the gyroscope has noticeably greater accuracy and measures movement not in m/s 2, but in radians or degrees per second. Due to this, it can be used to track head turns in a VR headset, as well as more accurately implement gesture control.
MEMS gyroscope under a microscope
Magnetometer and Hall sensor
A magnetometer measures the magnitude of the magnetic field in the surrounding world. It also takes measurements in three-dimensional space (along three axes of Cartesian coordinates - X, Y and Z). The main function of the magnetometer is to more accurately determine the location during navigation. In this mode of use it functions as a digital compass. Due to the fact that one of the axes, which is located in the plane with the North Pole of the Earth, registers a constantly increased background. The magnetometer helps to more accurately determine in which direction relative to north the smartphone is moving.
Smartphone magnetometer
A magnetometer is often called a Hall sensor, but these are not entirely identical concepts. We wrote more about the Hall sensor in another article. The differences are that the first is more universal and sensitive. The magnetometer is capable of measuring magnetic radiation, while only registering its presence/absence and decrease/increase. In modern smartphones, a separate Hall sensor is usually not installed, since a universal magnetometer completely covers its functionality.
One of the alternative functions of a magnetometer is to find wiring in walls. A live conductor generates a weak electromagnetic radiation, and the sensitivity of the sensor is units of microtesla. If you move your smartphone along the wall, the magnetic background will be increased where the cable is laid.
Gravity sensor
Measures the force of gravity of our planet in three-dimensional space. At rest (when the smartphone is lying on the table), its readings should coincide with the accelerometer: along one of the axes the gravitational force will be close to 9.8 m/s 2 . This sensor is usually not used on its own, but it helps the work of others. In navigation mode, it determines which side of the earth's surface is in order to quickly determine the correct position of the smartphone. When used in VR, the gravity sensor ensures the correct positioning of the image.
Linear acceleration sensor in a smartphone
The principle of its operation is almost identical to the accelerometer, the only difference lies in inertia. That is, the readings of this sensor do not depend on any global external factors (like gravity). The only thing it registers is the speed of the smartphone’s movements in space relative to its previous position.
The linear acceleration sensor is not capable of determining the position of the device in space (there is no reference to external landmarks), but this is not necessary (the gravity sensor and accelerometer do an excellent job of this task). The absence of reference to external landmarks allows you to rotate objects on the display without reference to these landmarks, for example, in games. Also, this sensor, in combination with others, increases the overall accuracy of movement detection.
Rotation sensor
It determines the direction and frequency of rotation of the smartphone relative to one of the axes of three-dimensional space. Like the acceleration sensor, it is independent and not tied to external reference points. Often performed as part of a single module with a linear acceleration sensor. Separately, as a rule, it is not used, but it allows you to adjust the operation of other sensors to improve accuracy. It also helps with gesture control, for example, by twisting the smartphone in your hand, the camera is activated.
Cutaway MEMS gyroscope
Temperature sensors
A modern smartphone is abundantly stuffed with digital thermometers. Structurally, they are a thermocouple: a resistor with two terminals, the resistance between which varies depending on the temperature. Since it is relatively primitive, it can even be implemented inside a semiconductor chip.
Every smartphone must have a battery temperature sensor. If it overheats, it turns off charging or reduces the output current to prevent the electrolyte from boiling, which leads to a fire or explosion. Thermometers inside the SoC are also common (from a couple of pieces to a dozen or more). They measure the temperatures of processor cores, graphics accelerator, various controllers. Sometimes there are also ambient temperature sensors, but they are not widespread. The reason for this is low accuracy, since heat from the inside of the device and the user’s hands distorts the readings.
Pressure sensor (barometer) in a smartphone
The barometer on your smartphone measures atmospheric pressure (in mmHg, bar or pascals). It allows you to more accurately determine your location and altitude above sea level, since the pressure decreases as you rise. It can also be used as an altimeter, measuring altitude above sea level, but the accuracy leaves much to be desired, since atmospheric pressure changes with the weather. The function of adjusting the weather forecast in meteorological programs and widgets is even less in demand.
Hygrometer
A hygrometer measures air humidity. Its main purpose is obvious, but this sensor is not popular. In theory, it can be used to correct weather forecast data. Knowing the readings, you can also control the indoor climate by turning on a humidifier or dehumidifier. The only one famous smartphones with a hygrometer - already old Samsung Galaxy S4.
Heart rate monitor or heart rate sensor in smartphones
The heart rate monitor is capable of measuring the frequency and rhythm of heart contractions. During sports, it makes it possible to monitor the work of the heart and adjust the load to increase the effectiveness of training. The disadvantage of a heart rate monitor is the need for close contact of the smartphone with a part of the body in which the blood vessels are close to the surface (for example, fingers) in order to catch the slightest pulsations. Because of this, it has not gained popularity in smartphones, but is found everywhere in smart watches and fitness trackers.
Heart rate monitor
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Availability of many sensors in modern mobile devices, this is a known fact, but how many there are and what these sensors are used for is a mystery. Many manufacturers indicate only the main well-known sensors in phones, like accelerometer, gyroscope And proximity sensor. But the vast majority of manufacturers write little at all about the sensors used and other electronics that their device is stuffed with.
We decided to clarify the situation with smartphone and tablet sensors. The purpose of the article is to tell what types of sensors there are, what they serve, in what devices they can be found and how.
They are called sensors various devices, reading Additional information. These solutions make working with a phone, tablet or other gadget more convenient and add functionality to the device.
The presence of many sensors in modern mobile devices is a known fact, but how many there are and what these sensors are used for is a mystery. Many manufacturers list only the basic well-known sensors, such as the accelerometer, gyroscope and proximity sensor. But the vast majority of manufacturers write little at all about the sensors used and other electronics that their device is stuffed with.
We decided to clarify the situation with smartphone and tablet sensors. The purpose of the article is to tell what types of sensors there are, what they serve, in what devices they can be found and how.
Basic sensors in smartphones and tablets
Accelerometer
(accelerometer, orientation sensor, acceleration sensor)– the simplest sensor that can be found in any smartphone or tablet. It is mainly used to register the rotation of the smartphone from portrait to landscape orientation. Often, the accelerometer is called G-Sensor. In general, the accelerometer records the difference between the acceleration of an object and gravitational acceleration along three axes. The electronics then calculate the difference, draw conclusions and send a signal software- when and in which direction to turn the screen. This leads to the main disadvantage of the accelerometer - if there is no acceleration or it is not great, then the accelerometer stops registering the position of the device in space or does so with a large error. This negatively affects the accuracy of device control, for example, in games or when controlling a quadcopter. This is where the next sensor comes to the rescue.
Gyroscope
(gyroscope)– also serves to register the position of the device in space, but, unlike the accelerometer, it can record the angle of inclination along three axes of even a stationary device. Using a gyroscope in games increases accuracy, since developers will have access to information about the deviation of the device in degrees with an error of only 1-2 degrees. Many people believe that even inexpensive smartphones and tablets are equipped with a gyroscope. However, our experiment showed that inexpensive smartphones and tablets cannot boast of having a gyroscope - only an accelerometer. Here are a few smartphones and tablets where the gyroscope could not be detected:We also did not find a gyroscope in
And here is where the notorious sensor is:
We also discovered a gyroscope in,. And there is no doubt that a gyroscope and a solid set of other sensors are contained in TOP solutions like, and other best modern smartphones.
Surprisingly, in the LG G4S and Asus FonePad 8 (which we already wrote about -) the gyroscope is not visible in the list of sensors, but there are plenty of auxiliary sensors:
In fairness, it should be noted that the auxiliary sensors, which we discussed at the very end of the article, can offset the absence of a gyroscopic sensor, but, we believe, not completely.
Geomagnetic sensor
(geomagnetic field sensor, magnetometer)– a sensor that responds to the earth’s magnetic fields. It can be used to determine the cardinal directions, which is why it is often called an electronic compass. In particular, the presence of such a sensor will greatly help devices without a GPS module determine their location (with the help of WiFi and towers cellular communication, of course). The magnetometer is one of the key sensors, which, together with the accelerometer and gyroscope, allows developers to use the device on full power. Sometimes, to further improve accuracy, additional hardware sensors with similar but simplified functionality are added, such as the Geomagnetic Rotation vector sensor. Naturally, the magnetometer can be used for its intended purpose: as a metal detector, to search for wiring in walls, as a compass - look for what you need in app stores.
Some smartphone apps that use a geomagnetic sensor
Proximity sensor
(proximity sensor)– the sensor allows you to determine the object in front of you and the distance to it. It is an infrared emitter and receiver. When no radiation arrives at the receiver, there is no object, and when it does, the object from which the beam is reflected exists. This sensor makes it possible to turn off the display when you bring your ear close to the smartphone to make a call. Advanced versions of the sensor are used as a gesture sensor - the smartphone can recognize certain hand gestures and perform a given action. In some cases, a proximity sensor can be used to turn off the display when using a case (a cheap alternative to a Hall sensor).Light sensor
(light sensor, light sensor)– allows you to calculate the level of external illumination. A smartphone or tablet with a light sensor can independently increase or decrease the brightness level of the screen backlight, which is very convenient, since adjusting the brightness several times a day is not the most pleasant experience. In TOP smartphones and tablets, an advanced version of the light sensor can be used - an RGB sensor, which is capable of capturing the intensity of primary colors (red, green and blue) to further adjust the picture on the display or to adjust the balance for photography. Such a sensor can be found in Galaxy Note 3, for example. And in Galaxy Note 4, the functionality of the light sensor has expanded to measure not only in the visible range, but also in ultraviolet. This ultraviolet sensor can measure the level of radiation and determine the time of day suitable for tanning.
Conclusion on the main sensors
So, the presence of only an accelerometer in a smartphone or tablet indicates that this is a device of the lowest price range and can only “rotate the screen”. This is the lot of cheap smartphones and tablets. Of course, there is a possibility that the manufacturer did not provide sane information about the types of sensors used - in this case, you need to start reading reviews that study in detail the hardware of the device using the System Info for Android application, for example.
The presence of an accelerometer, geomagnetic sensor, proximity and light sensor on a smartphone indicates that it is sufficiently equipped, but it is still not very good for controlling a quadcopter or games where tilt/rotate control is assigned to the user moving the smartphone. A gyroscope solves this problem - devices with a gyroscope accurately track the slightest deviations.
The presence of all of the above sensors, a large set of auxiliary sensors (discussed at the end of the article) and most of the sensors listed below indicate that this is an advanced device, the use of which will be a pleasure, and its capabilities will exceed all your expectations - this is best tablets and smartphones.
Sensors in expensive smartphones and tablets
Hall Sensor
(Hall sensor)– picks up a magnetic field, like a magnetometer, but has a simple principle of operation, that is, it reacts only to field enhancements, and does not register tension along the axes. Used for using Smart Cover type covers - allows you to turn off the screen when the magnet built into the cover approaches it. This sensor is rarely indicated by manufacturers, so pay attention to the available accessories for a smartphone or tablet - if there is a “smart case” among them, then a Hall sensor is present.
Barometer
(pressure sensor)– a sensor that measures atmospheric pressure. It can be used both for its intended purpose and as an assistant to GPS/GLONASS modules to speed up the determination of the device’s location and altitude above sea level (altimeter).
Thermometer
(ambient temperature sensor)– ambient temperature sensor. It first appeared on the Galaxy S4 to improve the performance of the S-Health application, but is now used in many other expensive smartphones.Humidity sensor
(hygrometer)– also first appeared in the Galaxy S4 as an extension of the S-Health functionality.
Pedometer
(pedometer, step detector)– the self-explanatory name of the sensor hints that it determines whether a person has stepped or not. This is truly a separate sensor that allows you to more accurately detect steps and reduce the load on the accelerometer, which is the pedometer in most smartphones without a dedicated sensor. To help the pedometer, a Step Counter sensor and even a pedestrian activity motion sensor are sometimes added - a step counter and a pedestrian activity sensor (probably estimates the pace of walking). Such a sensor is, for example, in the LG Nexus 5 and Galaxy Note 3.
Fingerprint's scanner
(fingerprint sensor, Touch ID)– a sensor that reads a unique fingerprint pattern. It’s strange to see a fingerprint scanner in an article about sensors - it would be better to include it in the section of an article about ensuring device security. However, this sensor can rightfully be considered one of the most important sensors in a modern smartphone. With its help, you can not only secure your smartphone, but also use it to open certain applications or confirm a payment.
Retinal scanner
(retina scanner)– a unique retina reader, this is the first place on the security pedestal. Such a sensor has been around for a long time, but it practical implementation So far, it has not been noticed in smartphones or tablets.
Heart rate sensor
(pulse meter, heart rate monitor)– first appeared in the Galaxy S5 so that the smartphone finally became a full-fledged personal trainer. The S-Health application began to receive more data about a person before, during and after training and was able to provide more accurate personal recommendations.
Dosimeter
- determines the dose of ionizing radiation or its power. In other words, the radioactive background can be measured. We have not seen a device with a built-in dosimeter in real life, but they say that in Japan there is a Pantone 5 smartphone equipped with this sensor. We're not surprised.
Auxiliary sensors that can be found in many smartphones and tablets
Sometimes, to further improve accuracy, additional hardware sensors with similar but simplified functionality are added (you may have seen them in the screenshots above).
There are probably other sensors, but only developers know the secrets of their use. operating systems and other software.
Not every mobile device user knows that most Android devices have such interesting thing like a barometer. Why is it needed on the phone? Is it really just to measure atmospheric pressure? In fact, this sensor is part of the GPS system and allows you to determine geolocation with maximum accuracy.
But, of course, nothing prevents us from using the barometer for its intended purpose. All it requires is to install special program from the shop Google Play. Below we present several such applications.
The app deserves to be number one on our list. The program has all the necessary functions and a user-friendly interface. It has its own widget that shows not only the current pressure, but also. If you wish, you can set up notifications to automatically appear on your smartphone's display. Alerts about upcoming natural surprises will appear as an icon in the notification bar. Unfortunately, latest version SyPressure has an annoying bug: sound warnings have started to turn on automatically in the settings, and the phone can sometimes ring at the most inopportune time.
At the top of the program window the atmospheric pressure at the current time is displayed. You can choose one of possible ways information output: scale, diagram or graph. The units of measurement can also be customized to your liking: hPa (hectopascal), inHg (inch of mercury), mmHg (millimeter of mercury), psi (pounds per square inch), atm (physical atmosphere). At the bottom of the window you can see pressure fluctuations (rise/decrease) and expected weather changes. The notification settings panel is also located here.
The paid program is another useful tool for measuring atmospheric pressure and, compared to SyPressure, has more settings. Several options for displaying information are supported: indicator, graph, altimeter and list. In addition, the widgets displayed on the screen vary in size: 1×1, 2×1, 2×2.
In the application, any of the functions can be configured with extreme precision. For example, in order to receive more reliable weather reports, you should indicate the basic measurement values for your location, and for the altimeter (altimeter) - the height above sea level. On the pressure change graph, you can set the desired display period (from 6 to 48 hours).
Here you can also choose the color of the main interface and indicators, and change the transparency of widgets. Like SyPressure, this tool works with different units of measurement. In general, using the program leaves a fairly pleasant impression. It, without a doubt, justifies its cost of 40 rubles.
Barometer Reborn
Barometer Reborn is a simple barometer that allows you to track the amplitude of changes in atmospheric pressure to determine the impact of these factors on your well-being. This may be useful for those of us who experience headaches and other discomfort when weather conditions change.
Knowing in advance about the upcoming natural metamorphoses, you can try to reduce their unpleasant effect to a minimum. For example, if the device shows an increase in atmospheric pressure, then on such days you should avoid increased physical activity. First of all, this is important for people suffering from respiratory diseases (such as asthma) or hypertension. On the contrary, a decrease in pressure should be a reason to spend more time in the fresh air.
Barometer & Altimeter
Barometer & Altimeter - the program uses a built-in GPS sensor (if there is none, it receives information from the Internet). You can track atmospheric pressure, air temperature, wind speed, visibility, altitude. This information will certainly provide invaluable assistance to fans of extreme sports, tourists and travelers.
Agree that this is quite an interesting application and definitely deserves attention. Imagine how great it would be to install a barometer and, climbing to the roof of a skyscraper, easily determine the altitude and atmospheric pressure.
The program is not demanding on your phone's memory resources and uses battery power very carefully. The interface is as convenient as possible, the settings are not complicated. Young researchers of natural phenomena, using this tool, will be able to conduct their first scientific experiments, quench their curiosity and thirst for knowledge.
mu Barometer
mu Barometer is a free and very simple tool that records changes in atmospheric pressure. The application has an elegant design and user-friendly interface; it uses measurement units such as mBar, mmHg, inHg, atm.
You can choose one of three proposed themes for the design of the widget displayed on main screen phone. The program also allows you to measure height (in meters or feet).
eWeather HD
The eWeather HD application is a complete weather station for your Android. Here you will find detailed information about natural phenomena for the next 10 days. The first thing that attracts attention is the amazingly beautiful images of the sun and clouds. Looking at them, you forget what purpose you had in opening this program. But in addition to colorful drawings, there are a huge number of other functions, and the forecasts are extremely accurate.
The main weather display screen contains a lot of useful information: humidity, pressure, temperature (real and felt), sunrise and sunset times, moon phases, temperature change charts, probability of precipitation, geomagnetism... By the way, weather-dependent people should pay attention to the last parameter. If geomagnetic storms are a concern for you, be sure to check the forecast before starting important tasks.
Equally, this information will be useful to everyone who reacts painfully to the approach of a thunderstorm, precipitation and other natural phenomena. You will be able to monitor changes in atmospheric pressure over the past 24 hours on a chart or graph, where the indicator turns red when the indicators are unfavorable.
It is impossible to list all the functions of this wonderful application, the interface of which looks really cool from a graphical design point of view.
According to medical statistics, more than half of the inhabitants of our planet react in one way or another to changing weather conditions. For some, these changes are practically unnoticeable, while others, on the contrary, have a hard time withstand surges in atmospheric pressure, surges in solar activity and magnetic storms. In addition, the vagaries of the weather often cause a deterioration in the health of people with chronic diseases of the joints and cardiovascular system, suffering from hypertension or arterial hypotension.
By knowing in advance about upcoming changes, you can try to minimize their negative impact on health. To always have the necessary information at hand, you just need to install one of the applications described above on your smartphone.
Windows 10 monitors each user - all his requests and location, smartphones are not even discussed - they show the owner’s route and the altitude (floor) on which he is located, and he knows geodata and your requests - and can also record your voice without your knowledge , take your photos, and send your fingerprints and retina scans to third parties
Despite their modest size, modern smartphones are very complex devices with powerful multi-core processors, cameras with autofocus and optical stabilization, high-resolution screens with high ppi values. In addition, any smartphone is equipped various sensors, which make using the device more convenient, or, especially in top-end gadgets, expand their capabilities. In our material today we will talk specifically about sensors, which of them can be found in modern gadgets, as well as how and why they are used.
The first sensor that began to be widely used in smartphones is accelerometer, which was also formerly often called G-sensor. As its name suggests, this sensor measures the acceleration of the device along three axes. Obviously, acceleration occurs only when the device moves or rotates in space, so the accelerometer cannot determine the position of a stationary smartphone. This means that its accuracy, for example, in games, will be relatively low.
To level out this drawback of the accelerometer, together with it in the overwhelming majority modern devices, including the most budget ones, applies gyroscope. Unlike an accelerometer, a gyroscope can determine the position in space (angle of inclination along three axes) of even a stationary device. The error of the calibrated gyroscope in modern smartphones, as a rule, does not exceed 1-2 degrees. Gyroscope and accelerometer are widely used in many mobile games for management, as well as in other applications - with a variety of tasks.
The next sensor, which can also be found in almost every smartphone, is magnetometer. This sensor reacts to the Earth's magnetic field and thus allows you to determine the cardinal directions. This, in turn, along with data about cell towers and points Wi-Fi access within visibility range, used when navigating in the absence of a GPS signal. A magnetometer is a sensitive sensor, and therefore, using a smartphone with it, you can, for example, look for wiring in a wall if it is not walled up deeply - just download an application that will read the sensor readings.
Almost everyone modern smartphone also cannot do without proximity sensor. The sensor is an infrared emitter with a receiver hidden under the front glass of the device. It can detect the presence of an object in front of it at a distance of about five centimeters. Thanks to this sensor, it is enough to bring the smartphone to your ear during a call - and the display will turn off automatically (as well as turn on if you remove the device); there is no need to use the power button for this. It is worth mentioning that some top Samsung smartphones use an advanced proximity sensor that performs the functions gesture sensor, responding to various movements of the hand above it.
Many smartphones, with the exception of budget models, are equipped light sensors. The main purpose of this sensor is to determine the level of external illumination and adjust the brightness of the display backlight in accordance with it.
This completes the list of common sensors. As you can see, most smartphones have at least five useful sensors, but in more advanced gadgets you can find many other sensors. One of them - barometer. Although he first appeared in Samsung smartphone Galaxy Note was a few years ago, but it can still only be found in some mid- and high-end devices. Like a magnetometer, a barometer helps the device quickly navigate the area and catch a signal from GPS satellites. Of course, by downloading one of many free applications, you can use a barometer for its intended purpose - to find out atmospheric pressure in pascals or millimeters of mercury. It is also possible to use a barometer as altimeter- a device that measures altitude above sea level. True, the accuracy of its readings in this case is noticeably affected by fluctuations in atmospheric pressure, but this is regulated by entering current weather data and a reference altitude point for a specific area.
The Samsung Galaxy S4 smartphone appeared for the first time thermometer. The use of this sensor is more than obvious: using pre-installed application S Health (however, you can download one of third party programs from Google Play) the user can find out the ambient temperature. The same can be said about the humidity sensor - hygrometer, which also debuted on the Samsung Galaxy S4 and can be used in conjunction with the S Health app.
To operate Smart Covers, when opened, the device screen automatically turns on, a Hall sensor is used. Like a magnetometer, Hall Sensor reacts to a magnetic field, but, unlike the first, has a simpler principle of operation: it does not determine the strength of the magnetic field along several axes, but simply responds to its intensification caused by the approach of a permanent magnet hidden in the cover.
Modern gadgets have long learned to perform the functions of a pedometer, but usually an accelerometer is used for this. One of the few devices that has pedometer The LG Nexus 5 smartphone became a separate sensor. While such a sensor is a novelty, it will probably soon be used in other devices.
Another rare sensor - heart rate monitor. On this moment a separate sensor for measuring heart rate can only be found in the Samsung Galaxy S5 and Samsung Galaxy S5 Active smartphones (not counting smart watch the same company running Android and Tizen).
A slightly more common sensor is Fingerprint's scanner, allowing you to quickly unlock your device without having to enter a password. Today this sensor is used in Apple iPhone 5S, Samsung Galaxy S5, HTC One Max and several other less common smartphone models. However, the first device, the iPhone 5S, is rightfully considered the standard for its implementation.
This is probably where the long list of sensors can be completed, but in the end we still left a sensor that is completely outlandish for a smartphone - dosimeter. It is known for certain that the Pantone 5 107SH released in Japan is equipped with it - probably, after the notorious nuclear power plant accident in the Land of the Rising Sun, they began to more carefully monitor the radiation situation around.
As a small conclusion, we repeat: almost any more or less modern gadget is equipped with at least five different sensors. The absolute record holder in terms of their number can be called the Samsung Galaxy S5, which, according to our calculations, has as many as 12 sensors. How many sensors have you counted in your smartphone?
