Description
Designed for Thermo Scientific Niton XL2 and XL3t handheld XRF analyzers, Alloy Geek® replacement measurement windows provide excellent clarity, durability, and convenient installation for a wide range of industrial XRF applications.
Available in Prolene, Polypropylene, and Kapton, these replacement windows accommodate different analyzer configurations, detector technologies, and analytical requirements.
Our proprietary Alloy Geek polypropylene and Prolene measurement windows feature improved adhesion, cleaner removal, enhanced clarity, and integrated easy-pull tabs, making routine window replacements faster and easier than traditional OEM alternatives.
These XRF-grade thin-film measurement windows protect sensitive analyzer components from dust, debris, and sample contamination while allowing X-rays to pass through the measurement aperture.
Why Choose Alloy Geek Measurement Windows?
- Designed & Manufactured by Alloy Geek® – Proprietary polypropylene and Prolene replacement windows engineered for compatible Niton XL2 and XL3t analyzers.
- Improved Clarity – High-quality XRF-grade films provide excellent visibility through the measurement window.
- Stronger Adhesive Bond – Enhanced adhesion helps maintain a secure attachment during regular analyzer operation.
- Cleaner Removal – Specially selected adhesive minimizes sticky residue left behind during window replacement.
- Easy-Pull Removal Tab – Integrated pull tab allows faster, more convenient window removal without excessive scraping or handling.
- Durable Construction – Carefully selected window films provide dependable protection for sensitive analyzer components.
- Easy Installation – Designed for straightforward alignment and application.
- Better Value – Cost-effective alternatives to Thermo Scientific OEM replacement windows.
These proprietary design improvements apply to Alloy Geek polypropylene and Prolene windows. Kapton windows are available for specialty applications.
Available Measurement Window Materials
1. Prolene Windows – AG-WIND-2-3
Recommended for Silicon Drift Detector (SDD) analyzers and applications requiring light-element sensitivity.
Prolene is one of the most common measurement window materials used in handheld XRF analyzers. These extremely thin films allow lower-energy X-rays to pass through the measurement window, supporting the detection and measurement of light elements.
If your original measurement window feels approximately as thin as kitchen plastic wrap, you likely have a Prolene window. However, ordinary plastic wrap is not an acceptable substitute for XRF-grade measurement film.
Alloy Geek's proprietary AG-WIND-2-3 Prolene windows provide excellent clarity, enhanced adhesion, cleaner removal, and convenient easy-pull tabs while maintaining the low-energy X-ray transmission characteristics needed for light-element analysis.
Common compatible analyzers include the Niton XL2 950, XL2 980, XL2 980 Plus, and Niton XL3t 900-series models.
Part Numbers:
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Alloy Geek: AG-WIND-2-3
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Thermo Scientific OEM Equivalent: 447-33771
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Previous Thermo Scientific OEM Part Number: 187-1454
2. Polypropylene Windows – AG-POLY-1
Recommended for PIN diode analyzers, including Niton XL2 and XL3t 100/500/600/700/800-series models.
Our XRF-grade polypropylene measurement windows are manufactured from durable, 1 mil thick polypropylene film with low impurities.
Polypropylene provides greater physical protection than thinner Prolene film and is commonly used with PIN diode XRF analyzers that are not designed for light-element analysis.
Alloy Geek's proprietary AG-POLY-1 polypropylene windows incorporate improved clarity, a stronger adhesive bond, low-residue removal, and an integrated easy-pull tab for convenient window replacement.
These durable windows are ideal for routine alloy identification, precious metals testing, scrap metal sorting, environmental screening, and industrial quality control.
Part Numbers:
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Alloy Geek: AG-POLY-1
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Thermo Scientific OEM Equivalent: 187-1555
3. Kapton Windows – Specialty Applications
Recommended for specialized analyzer configurations, particularly the Niton XL3p series.
Kapton is a durable, amber-colored polymer film used in specialized XRF measurement applications.
These 1 mil thick windows offer excellent mechanical strength and are the most physically robust of the three window materials offered in this listing.
Kapton windows are commonly associated with the radioisotope-source-based Niton XL3p analyzer and are available for specialized applications where this window material is required.
Part Number:
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Thermo Scientific OEM Equivalent: 187-1557
Niton XL2 & XL3t Measurement Window Compatibility Chart
Use the following chart to identify the appropriate replacement measurement window for your Thermo Scientific Niton analyzer.
| Analyzer Model | Niton PN | Alloy Geek PN | Light Elements | Typical Calibration |
|---|---|---|---|---|
| Niton XL2 100G | 187-1555 | AG-POLY-1 | No | General Metals |
| Niton XL2 100P | 187-1555 | AG-POLY-1 | No | Precious Metals |
| Niton XL2 500 | 187-1555 | AG-POLY-1 | No | Soils and Mining |
| Niton XL2 600 | 187-1555 | AG-POLY-1 | No | Soils |
| Niton XL2 700 | 187-1555 | AG-POLY-1 | No | Consumer Products |
| Niton XL2 800 | 187-1555 | AG-POLY-1 | No | General Metals |
| Niton XL3t 500 | 187-1555 | AG-POLY-1 | No | Soils and Mining |
| Niton XL3t 600 | 187-1555 | AG-POLY-1 | No | Soils |
| Niton XL3t 700 | 187-1555 | AG-POLY-1 | No | Consumer Products |
| Niton XL3t 700S | 187-1555 | AG-POLY-1 | No | Consumer Products |
| Niton XL3t 800 | 187-1555 | AG-POLY-1 | No | General Metals |
| Niton XL2 950 | 447-33771 | AG-WIND-2-3 | Yes* | Soils and Mining |
| Niton XL2 980 GOLDD+ | 447-33771 | AG-WIND-2-3 | Yes* | General Metals |
| Niton XL2 980 Plus | 447-33771 | AG-WIND-2-3 | Yes* | General Metals |
| Niton XL3t 950 GOLDD+ | 447-33771 | AG-WIND-2-3 | Yes* | Soils and Mining |
| Niton XL3t 960 GOLDD+ | 447-33771 | AG-WIND-2-3 | Yes* | Soils |
| Niton XL3t 970 GOLDD+ | 447-33771 | AG-WIND-2-3 | Yes* | Consumer Products |
| Niton XL3t 980 GOLDD+ | 447-33771 | AG-WIND-2-3 | Yes* | General Metals |
| Niton XL3p | Kapton | — | No* | General Metals |
Light-element capability depends on the analyzer's hardware and installed calibration. Prolene supports low-energy X-ray transmission but does not independently confer light-element capability. The XL3p entry reflects its typical General Metals configuration.
Important Compatibility Information: Other Niton XL2 and XL3t configurations may also be compatible. Custom analyzer configurations and specialized calibrations may require a different window material than the typical selection shown above.
Always match your replacement window to the material originally specified for your analyzer. If you're unsure which window to order, Contact Alloy Geek for assistance.
Engineered for Easier Maintenance
Measurement windows are essential consumable components of handheld XRF analyzers. During regular operation, these thin films can become scratched, punctured, contaminated, or otherwise damaged.
Alloy Geek developed its proprietary polypropylene and Prolene replacement windows to address common frustrations associated with traditional OEM window replacements.
Our improved adhesive design provides a strong, dependable bond while reducing residual adhesive during removal. Integrated easy-pull tabs simplify window changes, helping operators and technicians get their analyzers back into service with less downtime.
Whether you're performing positive material identification (PMI), precious metals analysis, scrap recycling, mining, soils analysis, or consumer product testing, Alloy Geek offers reliable measurement window solutions for your application.
Bulk Measurement Windows for High-Volume XRF Users
Managing multiple Niton XRF analyzers? Alloy Geek supplies replacement measurement windows for industrial facilities, scrap processors, inspection companies, rental fleets, and equipment service organizations.
Bulk purchasing options make it easier to maintain replacement window inventory and minimize interruptions caused by damaged or contaminated films.
Other Common Names for XRF Measurement Windows
These components may also be referred to as XRF window film, X-ray film, Niton screens, analyzer front windows, detector protection film, measurement window membranes, or simply the plastic window on the front of a Niton analyzer.
Keep your Niton XL2 and XL3t analyzers protected with quality replacement measurement windows from Alloy Geek®.
Alloy Geek® replacement measurement windows are aftermarket components. Thermo Scientific and Niton are trademarks of their respective owners. These products are not manufactured or endorsed by Thermo Fisher Scientific.