Reference Beam Splitter Assembly
Calcium fluoride beam splitter with kinematic mount for dual-beam UV-Vis spectrophotometers under 9027.30.40. Maintains reference beam stability for accurate absorbance readings. Precision optical/electrical part under 9027.90.56.30.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as general optical mirrors or prisms
Optical elements not dedicated to chapter 90 apparatus classify in heading 9001.
If parts of different chapter 90 instruments
Classification follows the principal instrument heading.
If basic glass optical elements without instrument mounts
Unfinished glass optics go by material rather than function.
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Import Tips & Compliance
• Provide coating specifications, wavelength range, and alignment tolerances
• Include proof of principal use via instrument service manuals referencing the part
• Declare optical substrate material (CaF2, quartz) accurately for verification
Related Products under HTS 9027.90.56.30
Spectrophotometer Quartz Cuvette Holder
Precision-machined holder designed specifically for securing quartz cuvettes in UV-Vis spectrophotometers classified under HTS 9027.30.40. It ensures accurate alignment and positioning for reliable absorbance measurements across wavelengths. This accessory falls under 9027.90.56.30 as a dedicated part for these electrical analytical instruments.
Electrode Assembly for pH/Conductivity Meter
Replaceable electrode module with glass membrane and reference junction for electrical spectrometers and ion analyzers under 9027.30.40. Provides precise measurement of hydrogen ion concentration and electrical conductivity in solutions. Classified here as an essential electrical part integral to the instrument's function.
Fiber Optic Probe for Raman Spectrometer
High-performance fiber optic probe with sapphire ball lens for remote sampling in Raman spectrometers (9027.30.40). Transmits laser excitation and collects scattered light for non-destructive molecular analysis. This specialized accessory qualifies under 9027.90.56.30 due to its principal use with covered electrical apparatus.
Sample Changer Carousel for Atomic Absorption Spectrometer
Automated 50-position sample carousel with stepper motor drive for atomic absorption spectrometers under 9027.30.40. Enables high-throughput analysis of trace metal concentrations in liquids. Falls under this HTS as an electrical part dedicated to the specified instruments.
Detector Module for FTIR Spectrometer
DTGS pyroelectric detector module with preamplifier for Fourier Transform Infrared spectrometers (9027.30.40). Converts IR radiation to electrical signal for spectral analysis. Classified as an electrical part under 9027.90.56.30 for these specific analytical instruments.
Tungsten Lamp Housing for UV-Vis Spectrophotometer
Precision-aligned deuterium/tungsten lamp housing assembly for UV-Vis spectrophotometers of 9027.30.40. Provides stable light source for quantitative analysis from 190-1100nm. This electrical component qualifies under 9027.90.56.30 as a dedicated instrument part.