The sensor is based on a potentiometer. A potentiometer is also known as a variable resistor. It is a perfect demonstration of a variable voltage divider circuit. Its voltage can be subdivided into 1023, easy to be connected to Arduino with our sensor shield.
Combined with other sensors, you are able to make interesting projects by reading the analog value from the IO port.
///Ar duino Sample Code
void setup()
{
Serial.begin(9600); //Set serial baud rate to 9600 bps
}
void loop()
{
int val;
val=analogRead(3);//Read rotation sensor value from analog 3
Serial.println(val,DEC);//Print the value to serial port
delay(100);
}