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Rely on the Thermo Scientific Niton XL3 Series of alloy analyzers

Positive Material Identification (PMI)

PMIIn an atmosphere of public scrutiny, stepped-up industrial safety regulations, and more stringent OSHA oversight and fines, it is absolutely essential for petroleum and petrochemical refineries to ensure that their positive material identification (PMI) programs meet best practices.


When There's No Room for PMI Mistakes

Whether you're an inspector, manager, health and safety professional, or serve another important role, you are on the front lines of regulatory compliance.  Using a Thermo Scientific Niton XL3t handheld x-ray fluorescence (XRF) analyzer for your PMI testing needs can help you:

  • Reduce material mix-ups
  • Mitigate risk
  • Improve documentation


With more than a decade of experience in positive material identification instrumentation, also known as positive material identification equipment, we offer:

  • A total PMI testing solution – Industry-leading training and technology with comprehensive, turnkey API 578 programs
  • A reputation for excellence – Outstanding precision with real-time traceable results
  • Unparalleled productivity – You can test miles of piping systems, vessels, and associated refinery equipment in a single turnaround

You remove the guesswork from material selection and improve productivity with just the simple pull of the trigger.

  • Incoming, in-stock, or in-service component testing
  • Accurate grade identification and elemental analysis in just 2 to 5 seconds
  • Hot-surface testing to 1000° F (538° C)
  • Fast, simple reporting and certificate generation

Fast, Reliable PMI Testing – Now with GOLDD Technology

Now, in addition to our Niton® XL3t 800 PMI analyzer, already known for its superior positive grade identification and alloy analysis, we offer the Niton XL3t 900 GOLDD.  It is the definitive tool for your analysis requirements, delivering improvements with:

  • Light element detection (Mg, Al, Si, P, S) without helium purge or vacuum
  • Overall sensitivity – confidently measure residual elements to mitigate risk
  • Even shorter measurement times

Hit the Spot

With the optional, revolutionary Thermo Scientific WeldSpot small-spot focus feature and Thermo Scientific CamShot view, we continue to provide you with the tools you require for your positive material identification verification and documentation needs.

  • Simple isolation and analysis of finished welds to verify filler material and dilution (butt and filler welds down to 3 mm in size)
  • Always immediately available for use; never lost
  • Ideal for positioning, analyzing, and documenting the results of small weld beads and small components
  • First ever integrated CCD camera and sample area imaging system
  • Image and analysis data stored together for easy reference, data management, and data integrity

One Stop Shopping – API 578 PMI Certification Course

Make sure you're ready for OSHA inspections.  As part of our turnkey PMI solution, we offer API RP-578 PMI certification training. Complete this course and:

  • Recognize best practices
  • Know current safety regulations
  • Practice PMI testing applications using XRF and OES technologies
  • Apply procedures for inspection and identification through positive material identification analysis
  • Understand and apply API RP-578 PMI Guidelines

Niton XL3t Series XRF Analyzers – For All Your PMI Needs

Find out why the Niton XL3t Series handheld PMI analyzer – now featuring GOLDD technology – is the #1 choice in PMI testing worldwide. Contact us today for a demonstration and discover how these versatile instruments can help you.