The MSA 170, a small full-sealed linear encoder for motion feedback, has a scale cross-section of 14 mm x 10 mm and contains a tiny glass scale to carry the measuring graduation. It features a graduation of 20 microns and a scanning carriage that operates on the principle of reflected light. The optics are protected from contamination by an aluminum extrusion and sealing lips. The scanning carriage is guided along the extrusion and the glass scale by ball bearings.
