The 4D InSpec Surface Gauge is the first handheld, precision instrument for non-contact surface defect measurement. With micrometer-level resolution, portability, affordability and ease-of-use, 4D InSpec puts high resolution measurement where it's needed: on the factory floor, in machine shops and in the field. 4D InSpec instantly measures defects and features from 0.1 to 100 mils deep. 4D InSpec is far more repeatable and accurate than visual comparison techniques typically used for surface defect measurements. Unlike high-end metrology systems it is rugged, flexible and affordable, to measure a wide range of part geometries in the most challenging environments. The 4D InSpec can be handheld to access tight corners or to sample large surfaces directly on components and features without line of sight. One-button operation and immunity to sensor movement make it easy to align and measure, while a rugged design and single cable tether withstand the rigors of daily use.