SMAX-SMAZ

Cost effective non-contacting absolute sensor
IP68 protection degree for harsh environments, IP69K on request
Modbus/RS485, SSI and Analogue output
Programmable resolution
Self-diagnostic on tape distance & integrity

Magnetic tape: 
https://www.lika.it/eng/products/linear-encoders/absolute-1/mta1-mta2-mta5