Whether it is giving automatic brightness to the screen, counting steps, rotating the screen by turning the phone or features like face unlock - all this is not possible without sensors. But have you ever wondered how many sensors are there in a smartphone and how do they work? Let's know in detail.

In today's era, smartphone is not just a calling device, but it has become a smart technology hub. Sensors play an important role in the advanced technology of smartphones. These are small electronic devices that make our phones smarter, faster and user-friendly.

Whether it is giving automatic brightness to the screen, counting steps, rotating the screen by turning the phone or features like face unlock - all this is not possible without sensors. But have you ever wondered how many sensors are there in a smartphone and how do they work? Let's know in detail.

1. Accelerometer

• What does it do?
• This sensor detects the movement and tilt of the phone.
• Where is it used?
• When you rotate the phone from landscape to portrait mode, the screen orientation changes. It is also used for step counting in fitness apps.

2. Gyroscope

• What does it do?
• This is a more advanced sensor than the accelerometer, which measures the phone's rotation speed in three directions (3D).
• Where is it used?
• It plays an important role in mobile gaming (games like PUBG, BGMI, Asphalt). It is used in video stabilization (OIS – Optical Image Stabilization).

3. Magnetometer

• What does it do?
• This sensor detects the earth's magnetic field and helps in showing direction like a compass.
• Where is it used?
• To show directions in GPS and map apps (Google Maps, Apple Maps). It is also used in metal detection apps.

4. Proximity Sensor

• What does it do?
• This sensor detects the proximity of an object or person in front of the phone.
• Where is it used?
• When you bring the phone to your ear while making a call, the screen automatically turns off to prevent touching. In pocket mode, the phone screen locks automatically.

5. Ambient Light Sensor

• What does it do?
• It measures the light level around the phone and automatically adjusts the screen brightness.
• Where is it used?
• Auto brightness feature, which saves battery. For improved indoor and outdoor visibility.

6. Barometer

• What does it do?
• It helps in measuring atmospheric pressure.
• Where is it used?
• To measure altitude in GPS. To provide weather related information.

7. Fingerprint Sensor

• What does it do?
• It provides security by doing biometric scanning of your fingers.
• Where is it used?
• To unlock the phone. For payment authentication (UPI, banking apps).