What is a sensor?

A sensor is a device that detects and responds to some type of input from the physical environment. An electronic sensor is an electronic device used to measure a physical quantity such as temperature, pressure or loudness and convert it into an electronic signal.

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Types of sensors

Proximity Sensor

This include most commonly used to sense when a phone is held up to the users ear to turn off the display.

Digital compass:

Digital compass is usually based on a sensor called the magnetometer and provides mobile phones with a simple orientation in relation to the Earth’s magnetic field.


A barometer helps the GPS chip inside the device to get a faster lock by instantly delivering altitude data.


This provide levels of enhanced security by capturing and validating human related metrics. Including Finger Print recognition, IRIS (eye) scanning and full facial recognition.

Accelerometer and Gyroscope

Accelerometers in mobile phones are used to detect the orientation of the phone.



This adds an additional dimension to the information supplied by the accelerometer by tracking rotation or twist.

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