Rotor encoder( incremental) and rotary angular sensor

Hello, can someone please explain to me the difference between rotor encoder and rotary angular sensor(potentiometer). I have a project and it has six component torque sensor, strain gauge, shaft, worm gear dc motor, rotor encoder and Arduino, I need the shaft to be rotated 0 to 90 degree or to 180 degree and move CW and CCW, but the thing is that i need to use a potentiometer ( rotary angular sensor) but I don’t know the difference between them . At the end in the monitor screen it should display force, speed, direction, time and acceleration of rotation .

7 posts were merged into an existing topic: Potentiometer