4D InSpec Surface Gauge

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4D Technology has announced the 4D InSpec Surface Gauge, the first handheld, non-contact instrument that measures precision machined surface defects and features with micrometer-level resolution.

The 4D InSpec employs 4D’s patented technology which enables rapid measurements that are unaffected by vibration present in most manufacturing environments. For the first time, QA/QC personnel using can take repeatable precision surface measurements in factory floor, machine shop and field service environments.

Precision machined surfaces on turbine blades, drive train components and other critical parts may incur damage during production and may wear and corrode from use and/or environmental exposure. These surface defects can cause system failures with significant financial consequences and even catastrophic, loss-of-life events.


The 4D InSpec enables direct inspection of large and small components on the shop floor. Rugged and lightweight, the handheld gauge has a single cable tether to its computer and is designed to handle the rigors of daily use. The system measures surface defects between 0.1 and 100 mils (2.5 to 2,500μm) deep on a wide variety of part geometries.

The 4D InSpec installs in minutes and features an intuitive, touchscreen interface for setup, operation, analysis and report generation. Its easy-to-use software automatically finds critical features and calculates height, volume, area, slopes and location. Operators can quickly select 2D traces or 3D plots to view feature details. The system also supports network or USB data transfer to QC systems for rapid pass-fail analysis and historical data tracking.

A complete 4D InSpec system includes the handheld gauge, computer, touchscreen display and software.