Laser focused carbon analysis

Significance of the Topic

The ability to perform rapid, accurate carbon analysis in the field is critical for industries that require precise alloy identification, weld inspection, positive material identification (PMI) and quality control. Handheld LIBS analyzers bring laboratory-grade performance directly to pipelines, welds and small part measurements, reducing downtime and eliminating the need to transport samples to a central lab.

Study Objectives and Overview

This document presents the design and performance of the Thermo Scientific Niton Apollo handheld LIBS analyzer. The primary goal is to deliver reliable, low-detection-limit carbon measurements and full alloy composition data within seconds. The analyzer targets applications such as piping weldability assessment, scrap sorting, PMI and on-site quality control.

Methodology and Instrumentation

The Niton Apollo uses laser-induced breakdown spectroscopy (LIBS) with a 1064 nm laser and high-purity argon purge to generate plasma emissions that are analyzed in real time. A tapered nose and Argon seal enhance sampling on small parts and difficult geometries. The instrument features on-board spectral libraries for stainless steel and low-alloy/carbon steel based on SAE, AISI and ASTM standards, with the option for user-defined libraries.

Instrumentation

• 1064 nm pulsed laser source (Class 3B) with chamber pressure, spectral type and light/dark interlocks for safe operation
• Argon purge system delivering ~200 shots per cartridge for improved sensitivity and reduced atmospheric interference
• Integrated macro and micro CCD cameras for accurate targeting and documentation of measurement locations
• Tilting color resistive touchscreen display with intuitive swipe and directional key navigation
• Internal GPS for automated location tagging; Bluetooth 4.0, Wi-Fi and USB for seamless data transfer
• Rugged IP54-rated enclosure; weighs 6.4 lbs (2.9 kg) with battery; operating temperature 0–40 °C; altitude up to 6 000 ft

Main Results and Discussion

Testing demonstrates that the Niton Apollo delivers laboratory-quality carbon and alloy measurements in approximately 10 seconds per sample. Low detection limits and real-time data display support fast decision-making. The refined tapered nose improves sample coverage on pipes, welds and small parts. Safety interlocks effectively mitigate the risk of laser misfire, and the instrument’s IP54 rating ensures reliable operation under field conditions.

Benefits and Practical Applications

• On-site alloy grade verification and carbon equivalency calculations for weldability assessments
• Enhanced productivity with point-and-shoot simplicity; minimal training required
• Elimination of heavy cart-mounted OES systems; analysis in confined spaces
• Prevention of contaminated scrap entering the supply chain by rapid tramp element detection
• Positive material identification to validate material test reports (MTR) and meet regulatory standards

Future Trends and Potential Uses

Advances in handheld LIBS analyzers are likely to include deeper integration with cloud-based analytics, AI-driven spectral interpretation, and extended coverage of non-metallic matrices. Further miniaturization of optics and gas management systems may enable even lighter instruments with higher shot counts. Real-time connectivity and global positioning integration will enhance traceability and data management in complex industrial environments.

Conclusion

The Thermo Scientific Niton Apollo handheld LIBS analyzer successfully bridges the gap between laboratory precision and field portability. Its rapid carbon and alloy analysis capabilities, robust safety features, and intuitive operation make it a valuable tool for a wide range of industrial and quality control applications.