... (1100mm—3000mm,5um)DC21 (1100mm—3000mm,1um)Some specification:Measuring range:50mm-3000mmGrating space:20um,10umInfrared wave length:88ommRolling system ... reliable performance & is convenient for installation.4)Glass precision measuring grating is adopted for the Linear Encoder as measuring benchmark to ensure high ... , maintain and repair the linear Encoder linear glass scale for measuring syaatem