Proximity
To measure how close an object is to the device’s screen
Accelerometer
To measure the rate of change of velocity of the device along all the three axes which includes gravity
Light
To measure the ambience of light or brightness
Magnetic
To measure the magnetic field along all the three axes of the device
Gyroscope
For the rate of rotation along all the three axes of the device
Orientation
For the orientation of the device with respect to earth
Camera
You can check the availability of both the front and back cameras.
Microphone
Detects the sound around the device
Touch
Detects the touch made on a device screen and also represents the maximum # of touches it can detect.