Optical Emission Spectroscopy (OES)

Seeing Beyond the Surface

Optical Emission Spectroscopy (OES)

Optical Emission Spectroscopy (OES), also known as Spark Emission Spectroscopy, is a non-destructive testing (NDT) technique used to analyze the chemical composition of materials. It is particularly valuable in industries where the elemental composition of metals and alloys is critical.


  • Non-Destructive: OES is a non-destructive technique, meaning it does not harm the material being tested. This makes it suitable for assessing the composition of valuable or irreplaceable components.
  • High Precision: OES provides precise quantitative data about the elemental composition of the material, often with detection limits in the parts-per-million (ppm) range.
  • Rapid Analysis: OES provides quick results, making it efficient for quality control and process monitoring.
  • Wide Element Range: OES can detect a broad range of elements, from major alloying constituents to trace impurities, making it versatile in various industries.
  • Reliable and Reproducible: OES is known for its high accuracy and reproducibility, making it a trusted method for material analysis.


  • Metallurgy: OES is extensively used in the metallurgical industry to analyze the composition of metals and alloys, ensuring they meet required specifications for strength, durability, and corrosion resistance.
  • Aerospace: OES helps ensure the integrity of aircraft components, such as engine parts and structural materials, by verifying their alloy compositions.
  • Automotive: Automotive manufacturers use OES to assess the quality of materials in engine components, chassis, and other critical parts.
  • Oil and Gas: OES is applied in the oil and gas industry to analyze the composition of pipelines, valves, and other equipment exposed to harsh environments.
  • Chemical Industry: OES is used to verify the composition of chemical substances and ensure they meet quality standards.
  • Mining: OES plays a role in assessing the quality of ore samples and monitoring the composition of metals during the extraction and refining processes.
  • Environmental Monitoring: OES is employed in environmental testing to analyze soil and water samples for the presence of contaminants.

Conventional NDT


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