When evaluating industrial-grade scanners, the most critical metric is Metrology-grade Accuracy, typically ranging from 0.02mm to 0.05mm. You must also consider the Volumetric Accuracy, which defines how error accumulates over larger objects. Additionally, check the Light Source Type; Blue Laser technology is superior for scanning shiny, reflective, or dark surfaces without the need for scanning spray, whereas Structured Light (LED) is better for high-speed capture of complex geometries with color texture.