A rotary encoder provides cyclical outputs (only) when the sensor is rotated. The incremental rotary sensor is the most widely used of all rotary encoders due to its low cost and ability to provide square wave signals that can be easily interpreted to provide motion related information such as position and velocity.

An incremental rotary encoder provides cyclical outputs (only) when the encoder is rotated. The incremental rotary sensor is the most widely used of all rotary encoders due to its low cost and ability to provide signals that can be easily interpreted to provide motion related information such as position and velocity.

Rotary optical encoder sensor has the features of compact size, high accuracy and resolution, no contact loss. One encoder sensor can be used to measure angle displacement and linear position also by the aid of mechanical converting devices.