An absolute linear encoder is used to accurately measure linear displacements.
ASM offers different types of absolute linear encoders with either cable actuated sensors a.k.a. string pots and magnetostrictive sensor technologies. Absolute linear encoders are available with many output types such as CAN bus, DeviceNet and SSI.
For more information regarding an absolute ASM linear encoder, please see the following links:
Cable Actuated Position Sensors
Magnetostrictive Position Sensors