Refractometer Prism Assembly
Sapphire prism assemblies for Abbe refractometers (9027.20) that measure refractive index through critical angle optics. These precision-ground prisms provide the optical interface for sample analysis in food, pharmaceutical, and chemical testing. Falls under 9027.90.64.00 as dedicated parts of optical refractometers.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If prism sold separately without refractometer designation
Undedicated optical prisms classified as general optical elements rather than instrument parts.
If parts for non-optical instruments like gas analyzers (9027.80)
Different parent instrument categories have separate statistical suffixes.
If common glass prisms rather than synthetic sapphire
Material composition determines glassware classification over instrument parts.
Not sure which classification is right?
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Import Tips & Compliance
• Include calibration certificates showing prism refractive index accuracy to ±0.0001 for proper classification
• Document compatibility with specific refractometer models (e.g
• ABBE type) to distinguish from general optical components
• Avoid bulk packaging that suggests general optical element use, which could trigger 9001 classification
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