External installation, easy to use,, No zero, absolute displacement output, , Non-contact sensing technology, never worn, , High accuracy, 16 bit D/A for Analog output type, , min. 2um for SSI output type,, Non-linearity <±0.01% of full stroke, , Repeatability: <±0.002% of full stroke,, Modular design, replaced by convenience, , Low power design, reduce the heat.