Chapter 9012 — Customs Tariff Headings
Subheadings
Products classified under Tariff item 90.12
Atomic Force Microscope (AFM)
An atomic force microscope (AFM) uses a sharp probe to scan a sample surface, measuring interatomic forces to generate high-resolution 3D topographic images. It operates without optical magnification, relying on mechanical detection, and is therefore classified as a microscope other than an optical microscope under tariff item 9012.10.00.
9012.10.00Electron Probe Microanalyzer (EPMA)
An electron probe microanalyzer (EPMA) combines electron microscopy with wavelength-dispersive X-ray spectrometry to perform elemental analysis at microscopic scales. Its primary function is imaging via electron beams, making it a non-optical microscope under tariff item 9012.10.00.
9012.10.00Field Emission Microscope
A field emission microscope uses field-emitted electrons to image surface structures at high resolution under ultra-high vacuum conditions. As it relies on electron emission rather than light, it qualifies as a non-optical microscope under tariff item 9012.10.00.
9012.10.00Helium Ion Microscope
A helium ion microscope uses a focused beam of helium ions to image surfaces with sub-nanometer resolution, offering minimal sample damage. It is a charged-particle microscope, not an optical one, and is correctly classified under tariff item 9012.10.00.
9012.10.00Near-Field Scanning Optical Microscope (NSOM)
A near-field scanning optical microscope (NSOM) achieves resolution beyond the diffraction limit using a sub-wavelength aperture, but it still employs optical detection. Despite its optical nature, it is classified as a specialized non-optical microscope under tariff item 9012.10.00 due to its scanning probe mechanism.
9012.10.00Neutron Diffraction Instrument
A neutron diffraction instrument uses neutron beams to probe magnetic structures and atomic arrangements in materials, producing diffraction patterns. As a diffraction apparatus that does not rely on optical methods, it falls under tariff item 9012.10.00.
9012.10.00Powder X-Ray Diffractometer
A powder X-ray diffractometer analyzes polycrystalline samples by measuring diffraction angles of X-rays scattered from the sample. It is a dedicated diffraction apparatus, not an optical microscope, and is classified under tariff item 9012.10.00.
9012.10.00Scanning Electron Microscope (SEM)
A scanning electron microscope (SEM) uses a focused electron beam to scan a sample's surface, producing high-resolution images of topography and composition. As a non-optical microscope, it is classified under tariff item 9012.10.00.
9012.10.00Scanning Tunneling Microscope (STM)
A scanning tunneling microscope (STM) measures quantum tunneling currents between a sharp probe and a sample surface to produce atomic-scale images. It operates without light, using electron tunneling, and is classified as a non-optical microscope under tariff item 9012.10.00.
9012.10.00Transmission Electron Microscope (TEM)
A transmission electron microscope (TEM) transmits a beam of electrons through an ultra-thin specimen to form images at atomic resolution. As a non-optical microscope using electron transmission, it is classified under tariff item 9012.10.00.
9012.10.00X-Ray Diffraction Apparatus
X-ray diffraction apparatus directs X-rays at crystalline samples to analyze atomic and molecular structure through diffraction patterns. It is a diffraction apparatus, not an optical microscope, and is classified under tariff item 9012.10.00.
9012.90.00AFM Vibration Isolation Platform Mounts
Vibration isolation platform mounts specifically designed for atomic force microscopes (AFMs), a type of non-optical microscope. These mounts damp external vibrations to ensure nanometer-scale measurement accuracy, making them dedicated parts or accessories for AFM systems.
9012.90.00Atomic Force Microscope Probe Tips
Silicon cantilever probe tips with nanoscale sharp points used to scan surfaces in atomic force microscopes (AFMs). These are consumable accessories essential for AFM operation, falling under parts and accessories for non-optical microscopes.
9012.90.00Diffraction Apparatus Calibration Grids
Precision gold calibration grids used to align and calibrate electron diffraction apparatus, which falls under diffraction apparatus in heading 9012. These grids are essential accessories for ensuring accurate lattice measurements in diffraction analysis.
9012.90.00Diffraction Powder Sample Spinner
Motorized spinner stage for rotating powder samples uniformly in electron diffraction apparatus. This accessory reduces preferred orientation artifacts, making it a dedicated part for diffraction equipment under heading 9012.
9012.90.00Electron Microscope Control Software Dongle
Hardware security dongle with embedded firmware used to license and interface electron microscope control software. As a dedicated accessory for non-optical microscopes, it enables authorized operation and is classified under parts and accessories.
9012.90.00Electron Microscope Cryo-Holder
Liquid nitrogen-cooled specimen holder for cryogenic electron microscopy in transmission electron microscopes (TEMs). This accessory enables imaging of frozen biological samples and is dedicated to non-optical microscopes.
9012.90.00Electron Microscope Objective Lens
Precision electromagnetic lens assembly designed for scanning electron microscopes (SEMs) to focus the electron beam. This is a dedicated part for non-optical microscopes, essential for imaging performance.
9012.90.00Microscope Diffraction Pattern Camera
Digital imaging camera optimized for capturing electron diffraction patterns from non-optical microscopes like TEMs. This accessory is essential for recording diffraction data and falls under parts for diffraction apparatus.
9012.90.00Microscope Stage Joystick Controller
Handheld joystick controller for precise manual control of electron microscope sample stages. This accessory is designed specifically for non-optical microscopes, improving operator control during imaging.
9012.90.00Scanning Electron Microscope Sample Stage
Motorized XY stage for holding and positioning specimens under a scanning electron microscope. This is a principal accessory for SEMs, enabling automated sample movement and precise imaging.
9012.90.00SEM Ionizer Accessory
Electron flood gun ionizer for neutralizing surface charge on non-conductive SEM samples. This dedicated accessory improves imaging of plastics and biological specimens in non-optical microscopes.
9012.90.00SEM Secondary Electron Detector
Scintillator-based detector for capturing secondary electrons in scanning electron microscopes. This essential part converts electrons to photons for PMT readout, enabling surface topography imaging.
9012.90.00SEM Vacuum Pump Adapter Kit
Custom adapter flanges and seals connecting turbo pumps to scanning electron microscope chambers. These parts are designed specifically for SEMs to maintain ultra-high vacuum for clear imaging.
9012.90.00TEM Aperture Strip
Carousel strip holding interchangeable objective and condenser apertures for transmission electron microscopes. This precision-machined platinum part optimizes beam alignment and resolution in non-optical microscopes.
9012.90.00Transmission Electron Microscope Specimen Holder
Specialized grid holder for thin-section samples in transmission electron microscopes (TEMs), designed for high-vacuum and tilt functionality. This accessory is dedicated to non-optical microscopes for structural analysis.