This award-winning (SPIE Prism Award) roughness device is rapid, durable, and portable, allowing for high-resolution, 3D surface finish assessments right on the shop floor.
Next-Level Precision Surface Finish Measurements On the Shop Floor
- Vibration-insensitive 3D surface roughness measurement
- Vertical resolution down to 12 nm Sa
- Scratch-free NDT measurement
- Directly measure the roughness of both small and large components
Portable, Production-Ready Surface Metrology
The 4Di InSpec SR Surface Roughness Gauge is a compact, high-precision device developed for quick and accurate 3D surface measurements in real-world production environments. It is rugged and easy to use, producing reliable results in a variety of settings without the need for a laboratory.
Advanced Optical Technology
The 4Di InSpec SR records accurate data even in difficult conditions thanks to its innovative optical technology, which enables measurement despite vibration. The technology provides quick, high-resolution areal roughness analysis by gathering millions of data points in a matter of seconds.
Fast, Accurate, and Non-Destructive
By allowing ultra-precise roughness assessments down to 12 nm Sa in seconds, directly on the shop floor, the 4Di InSpec SR redefines surface inspection.
Its scratch-free technology prevents any surface damage, making it suitable for fragile and high-value components. Measure directly on large parts without duplication, simplifying procedures and shortening the time to results.
Compatible materials include:
- Plastics
- Silicon
- Metals
- Carbon fibers
- Composites

Image Credit: 4D Technology
3D Roughness of Different Structures and Materials Easily Measured
The 4Di InSpec SR makes it easy to rapidly and consistently collect reliable 3D roughness data across a variety of surfaces and materials.
Powered by the user-friendly 4Sight Focus software, the device has a modern touchscreen interface that simplifies setup, operation, analysis, and data transfer to the quality systems. Built-in autofocus, auto-brightness, and automatic scanning improve each measurement, saving operator effort and assuring consistency.
Calculate and report 3D roughness values, highlight crucial features, and reliably detect surface faults. Full compliance with ISO roughness requirements, including standard filters and parameters, enables simple integration into current workflows and quality procedures.
Available in Multiple Configurations and Accessories

Armature for large, complex components. Image Credit: 4D Technology

Tabletop measurement for small components. Image Credit: 4D Technology

Robot-mounted configuration for automated measurements. Image Credit: 4D Technology
What to Expect
Description
The 4Di InSpec SR is a patented, optical, vibration-insensitive device that enables 3D surface measurement in a variety of environmental conditions.
- 3D results: More thorough and representative
- Millions of data points: For a more precise roughness measurement
- Portable, workstation, or robotic operations
- Surfaces can be ultra-finished, corroded, or shot-peened without replication
- Shop-floor capable: Rugged and simple to use, measure directly on the shop floor
- High performance: High resolution, high accuracy of area measurement
- ISO-compliant parameters (ISO 25178)
Full Kit
The 4Di InSpec SR is offered as a comprehensive measurement system:
- 4Di InSpec SR roughness measurement tool
- Connecting cables and power supplies
- Complete laptop computer system
Analysis
The 4Di InSpec SR analysis software delivers rapid insight into a sample's roughness. 2D and 3D displays, filtering, flaw detection, and other sophisticated features make it easy to emphasize surface quality, roughness, and defects.
Data can be exported to third-party software like Bandify3D, which offers multiband surface texture analysis for 3D measurement data, with just a click.

Image Credit: 4D Technology