linear scale for real time error elimination

{"cid":"91224838","title":"Enclosed Linear Scale Direct Mounting: Real-Time Error Correction for CNC Axes","imgUrl":"https:\/\/img.chinax.com\/nimg\/8c\/82\/a071a1ce9a498e37b106021a5e2c-200x200-1.jpg","attrs":{"Price":"US$90-150","Brand Name":"MEAXPERT","Model Number":"Change Rack","Minimum Order Quantity":"10","Delivery Time":"15days","Payment Terms":"L\/C,T\/T","Packaging Details":"Aluminum Alloy Box","Place of Origin":"China"}}

{"cid":"91204360","title":"IP67 3 Axis Digital Readout SINO SDS2-3VA Linear Scale Encoder For Milling Machine","imgUrl":"https:\/\/img.chinax.com\/nimg\/c0\/73\/87614d88687089631cf23fffd11c-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"SINO","Model Number":"SDS2-3VA, KA300, Ka500","Minimum Order Quantity":"1 PC","Delivery Time":"5-8 days","Certification":"CE,RoHS","Place of Origin":"Guangzhou, CHINA","Payment Terms":"T\/T, L\/C, Western Union, MoneyGram","Supply Ability":"1000 pcs per month","Packaging Details":"Carton","Name":"3 Axis Digital Readout DRO SINO SDS2-3VA Linear Scale Encoder for Milling Machine Lathe Machine","Number of Axis":"3 axis Digital Readout Encoder Ka300","Color":"Grey","Signal":"Digital readout system: TTL \/ RS422","Voltage":"Lcd Digital readout kits: AC100-240V \/ 50-60Hz","Suitable for":"Milling machine, boring machine, lathe","Resolution":"1um,5um,0.5um","Material":"Metal","Output":"RS232\/RS485\/TTL","Enclosure":"IP67 protection"}}

{"cid":"91190804","title":"PFD779 Floor Scale \u2013 Corrosion-Resistant Stainless Steel Platform for Industrial Weighing","imgUrl":"https:\/\/img.chinax.com\/nimg\/49\/5a\/d76bc716bac1d273f37dacc53f58-200x200-1.jpg","attrs":{"Price":"Negotiation","Brand Name":"Mettler Toledo","Model Number":"Floor Scale PFD779 Stainless Steel","Minimum Order Quantity":"1 set","Delivery Time":"10-30days","Place of Origin":"China","Supply Ability":"2000 set per month","Packaging Details":"Caron box","Product":"Mettler Toledo Indicator","Maximum Capacity":"300 kg","Floor Scale Type":"All Floor Scales, Digital Floor Scales","Cable":"3 m","Protection Rating":"IP69k, IP68","Platform Type":"Floor scale","Dimensions\/Platform Size":"\u22641000 mm, \u226440\"","Hygienic Design":"No","Environment":"Wet & Harsh Wet (\u2265IP66)","Legal for Trade":"OIML","Finish":"Glass bead blasted smooth","Hazardous Approval":"ATEX Cat. 3GD"}}