What does the word encoder mean? ！

The encoder is an electromechanical device that can measure displacement.
Encoders are normally digital displacement transducers, consisting of a mechanical element
and a sensing head, typically of optical type. The mechanical element can be a disc (for rotary
type encoders) or a ruler (for linear type encoders) with deposited or carved patterns. The
sensing head includes a light source (LED) and a light sensor (photo detector) to read the
generated code (the encoder output).

Previous：Roundss digita output draw wire sensor digital display analog output draw wire sensor
Next：Encoder accessory universal coupling assembly stainless steel coupling