The Thermo Scientific™ Niton™ XL5e Prolene Measurement Window is a critical consumable component designed to protect the detector assembly of the Niton XL5e Handheld XRF Analyzer while allowing efficient transmission of X-rays for elemental analysis.

This Prolene film window supports the XL5e’s wide analytical range (Mg–U) and is suitable for use across all standard XL5e application modes, including General Metals, Light Metal Quick Sort (LMQS), Mining, Soil, and Plastics.

Function and Purpose

The measurement window forms the primary interface between the sample and the analyzer detector. It is engineered to:

• Protect internal detector components from puncture and contamination
• Maintain proper X-ray transmission for accurate elemental detection
• Support low-energy X-ray analysis required for light elements such as Mg, Al, and Si

A damaged or contaminated window can negatively affect detection limits, precision, and repeatability, particularly when operating the XL5e in LMQS, mining, soil, or plastics modes.

Technical Details

• Compatible instrument: Thermo Scientific Niton XL5e Handheld XRF Analyzer
• Window material: Prolene film
• Supported applications:
  • General Metals
  • Light Metal Quick Sort (LMQS)
  • Mining
  • Soil
  • Plastics
• Purpose: Detector protection and clean X-ray transmission
• Installation: Installed and secured using the XL5e window bracket (sold separately)

When to Replace the XL5e Measurement Window

Replacement is recommended if you observe:

• Visible pinholes, tears, or stretching
• Surface contamination that cannot be safely cleaned
• Reduced analytical performance or unstable readings
• Damage caused by sharp samples or rough surfaces

Routine window inspection is especially important when analyzing scrap metal, soil, rock, or irregular samples.

Related XL5e Parts & Accessories

This Prolene measurement window is designed to be used with the XL5e window bracket / retaining frame, which secures the window in place and ensures proper detector alignment. Thermo Scientific Niton XL5e Measurement Window Bracket (sold separately)

What’s Included

• Pack of 10 Prolene measurement windows
  or
• Pack of 25 Prolene measurement windows

Frequently Asked Questions (FAQ)

What does the measurement window do on a handheld XRF analyzer?

The measurement window protects the detector while allowing X-rays to pass between the sample and the analyzer. It is essential for accurate elemental analysis and detector safety.

Does a damaged window affect XRF results?

Yes. Tears, pinholes, or contamination can reduce X-ray transmission, increase noise, and negatively impact detection limits—especially for light elements.

Is this window compatible with other Niton models?

Yes, but only with the Niton XL5 and Niton XL5 Plus handheld XRF analyzers. This Prolene measurement window is designed specifically for the Niton XL5 platform and is not compatible with the XLi, XLt, XLp, XL2, or XL3t analyzers.

Do I need the window bracket as well?

Yes. The window must be secured using the XL5e measurement window bracket.