1:measure length from 50-3000mm(2--118inch) 2:resolution:1um,5um0.1u,0.5u etc 3:ISO9001:2008,CE,ROHS 4:manufacture,fair price Linear scale1:output:+5VTTL,+12VTTL,24VTTL2:Output signal:TTL,EIA-422-A (RS-422)~1VPP3:Rolling system:vertical five bearing rolling system4:Grating system transmission infrared optical measuing system the infrared wave length is 880nmcharacteristic1:high speed of movement, ...