Mitutoyo Coolant Proof Linear Scale - IP66 Level Protection Specifications include... Range 8" / 200mm Resolution .0005" / 0.01mm Accuracy .001" / 0.03mm Features include... Newly employed detection method (Electromagnetic induction method) enables use in adverse environments with water and cutting oil. Specially designed output cables are developed to maintain the water resistant structure. No over speed error since it employs absolute scale which reads the absolute value. Once an absolute zero (origin) point is set, the Digimatic Scale Unit shows its absolute distance from the point whenever turned on rather than 0.00".