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.
Types of sensors
Proximity Sensor: most commonly used to sense when a phone is held up to the users ear to turn off the display.
Digital compass: digital compass that’s usually based on a sensor called the magnetometer and provides mobile phones with a simple orientation in relation to the Earth’s magnetic field.
Barometer: helps the GPS chip inside the device to get a faster lock by instantly delivering altitude data.
Biometrics: 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.
Gyroscope: adds an additional dimension to the information supplied by the accelerometer by tracking rotation or twist.
See also: Cellular Network