Do you know why the Smartphone screen goes off when you bring the phone close to ears during a call? Do you know why your screen rotates by 90 degree while playing certain games? It’s all because of sensors. Your smartphone experience is made smoother with this sensors so you don’t have to do manually. Today we are going tell you the different types of sensors in a typical smartphone. So, lets begin!


This is the most important sensor. It is used to determine the orientation of the phone. It also measures the acceleration that the handset is experiencing relative to freefall. Typical Ex: If you turn on the sensor and turn the device by 90 degrees, your device screen will also rotate. All thanks to the accelerometer. Want to know how it works? Click here

2.Light Sensor:

If you screen is on auto brightness then you might have noticed that the screen goes dim and dip as the amount of light in the surrounding varies. This is done by light sensor. It measures the light and sends to the device. The phones software uses this data to adjust the brightness. When there is more light in surrounding, your screen will be the brightest. This prevents strain on eyes and better viewing experience. If your phone doesn’t have this sensor then you have to manually change the brightness everytime.


3.Proximity Sensor:

You might know those old smartphones, when you used to call a customer care. The IVRS prompts you to enter numbers, then you had to press the lock key to turn on the display. It was really irritating. Today’s smartphone have Proximity sensor that simplifies this task. This sensor is always located near the earpiece. When you get a call and place the phone near your ears, the sensor sends a signal to the device to switch off the display. This is mainly done to avoid accidental operation that may happen during a call. As soon as you take the phone away from your ears your screen will turn on. This also saves battery especially during long calls. Not only ears, even if you keep any opaque object within 2-3 cm of the sensor it will cause the display to turn off.


This sensor measures the angular velocity. Its mainly used in Virtual Reality and Photo spheres. You can watch 360 degree videos without even touching the screen. Just moving the phone will automatically change the viewing angle.


Its a small miniature compass in the device that measures magnetism. It comes really handy while using Google Maps. Your phone automatically point to North direction. So next time you get lost and if your phone has magnetometer, do use it and find your way home.

6.Fingerprint Sensor:

Used to be considered as the most premium feature in a phone, now its available within Rs 5k Smartphones. It is considered to be the most secure way to keep the data safe. There are different types:

  • Ultrasonic: Uses ultrasonic beams to capture fingerprint.
  • Capacitive: Consists thousands of tiny capacitors that can capture fingerprint.
  • Optical: It creates a 2-D image of the fingerprint.

The sole purpose is to protect the phone from unauthorized access. You can bring more functionalities, click here

So we have covered all major sensors that are available in a smartphone. Did we miss any important ones? Let us know in the comments.





Leave a Reply