Chapter 8543 — Customs Tariff Headings

8543.20.00Signal generators

8543.30.00Machines and apparatus for electroplating, electrolysis or electrophoresis

8543.40Electronic cigarettes and similar personal electric vaporizing devices

8543.70.00Other machines and apparatus

8543.90.00Parts

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Products classified under Tariff item 85.43

CERN Large Hadron Collider (LHC) Superconducting Magnet Assembly

A superconducting dipole magnet assembly designed for the CERN Large Hadron Collider, used to steer and focus proton beams traveling at near-light speeds. This is a core component of a particle accelerator, as it maintains the beam trajectory within the accelerator ring. It falls under tariff item 8543.10.00 because it is an integral part of a particle accelerator system.

Compact Cyclotron for PET Isotope Production

A compact cyclotron specifically designed to accelerate protons for the production of PET isotopes in medical settings. It is a self-shielded particle accelerator that generates radioactive isotopes for diagnostic imaging. This falls under tariff item 8543.10.00 as a particle accelerator used in medical applications.

Dielectric Wall Accelerator (DWA) Prototype

An experimental compact accelerator using dielectric wall technology for high-gradient proton acceleration, designed for portable cancer therapy applications. It is an innovative particle accelerator that uses dielectric insulators to achieve high acceleration gradients. This falls under tariff item 8543.10.00 as a particle accelerator, even in prototype form.

Electron Beam Welding Accelerator Gun

An electron beam gun used in precision industrial welding, which accelerates electrons to high energies to create a focused beam. It functions as a particle accelerator in vacuum welding applications. This falls under tariff item 8543.10.00 as a particle accelerator used for industrial purposes.

Free Electron Laser Undulator Accelerator Section

An undulator magnet array used in free electron lasers to accelerate electrons and generate coherent light. It is a component of a particle accelerator that produces synchrotron radiation for advanced light sources. This falls under tariff item 8543.10.00 as a particle accelerator component.

Induction Linear Accelerator (ILAC) Module

An induction accelerator cell designed for high-current electron beams in flash radiography applications. It uses induction principles to accelerate particles for hydrodynamic testing. This falls under tariff item 8543.10.00 as a particle accelerator module.

Laser Wakefield Plasma Accelerator Module

A plasma-based particle accelerator using laser-driven wakefields for next-generation collider research. It is an experimental system designed for high-gradient particle acceleration. This falls under tariff item 8543.10.00 as an innovative particle accelerator technology.

Medical Betatron Electron Accelerator

A betatron designed for intraoperative radiation therapy, accelerating electrons to produce X-rays during surgery. It is a compact particle accelerator for medical radiation delivery. This falls under tariff item 8543.10.00 as a particle accelerator used in medical applications.

Muon Collider Test Accelerator Section

A prototype accelerator section for future muon collider research, testing ionization cooling and acceleration of short-lived muons. It is a particle accelerator for fundamental physics research. This falls under tariff item 8543.10.00 as a particle accelerator.

Neutron Generator Particle Accelerator

A compact accelerator that produces neutrons through deuterium-tritium fusion for materials analysis. It is used in oil well logging and non-destructive testing. This falls under tariff item 8543.10.00 as a particle accelerator generating neutron beams.

Proton Therapy Synchrotron Ring Accelerator

A medical synchrotron that accelerates protons for cancer therapy with precise tumor targeting, providing pencil beam scanning capability. It is a particle accelerator used in proton beam therapy systems. This falls under tariff item 8543.10.00 as a particle accelerator for medical treatment.

Synchrotron Radiation Source Cyclotron Accelerator

A cyclotron accelerator designed to generate synchrotron radiation for materials science research and spectroscopy. It produces high-intensity X-ray beams through relativistic electron acceleration. This falls under tariff item 8543.10.00 as a particle accelerator for research applications.

Tandem Pelletron Heavy Ion Accelerator

A tandem electrostatic accelerator for heavy ion beams in nuclear astrophysics research, providing high charge state ions. It uses tandem voltage acceleration principles. This falls under tariff item 8543.10.00 as a particle accelerator for research.

Van de Graaff Electrostatic Particle Accelerator

A high-voltage electrostatic accelerator for nuclear physics research, accelerating ions to MeV energies using electrostatic fields. It is commonly used in academic and research settings. This falls under tariff item 8543.10.00 as a particle accelerator.

Varian Linear Accelerator (LINAC) RF Power Source Module

A radio frequency power module for medical linear accelerators used in radiation therapy, providing the accelerating electric fields for electrons. It is a component of a particle accelerator system. This falls under tariff item 8543.10.00 as it is essential for particle acceleration.

Analog Devices AD9910 DDS Function Generator Module

A direct digital synthesis (DDS) module that generates sine, square, and triangle waveforms up to 400 MHz for electronic test benches. It falls under this tariff item as it performs the individual function of signal generation, not specified elsewhere in Chapter 85.

Keysight N5182B MXG X-Series Microwave Analog Signal Generator

A microwave analog signal generator operating up to 31.8 GHz for radar and satellite testing. It is classified here because it generates precise analog RF signals, a function not covered by other headings in Chapter 85.

National Instruments PXIe-5451 Arbitrary Waveform Generator

A PXI modular arbitrary waveform generator for high-speed signal simulation in automated test equipment. It falls under this item as a signal generator creating custom digital and analog waveforms, an individual function not specified elsewhere.

Quantum Instruments QTT Quantum Test Tone Generator

A pocket-sized test tone generator producing standard audio test signals for field service technicians. It is classified here because it generates signals, a function not covered by other headings in Chapter 85.

Rohde & Schwarz SMBV100A Vector Signal Generator

A professional-grade vector signal generator producing complex modulated signals for testing wireless communication systems like 5G and LTE. It falls under this item as a dedicated signal generator with an individual function not specified elsewhere.

Stanford Research Systems DS360 Ultrastable Audio Signal Generator

A precision audio analyzer and generator producing distortion-free sine waves down to 10 Hz for audio equipment testing. It is classified here for its dedicated signal generation function in the audio frequency range, not specified elsewhere.

Anode Basket for PCB Plating Line

A titanium anode basket designed for use in electrolytic plating baths, specifically for copper deposition on PCB panels. It holds soluble anodes and ensures uniform electroplating, making it essential for high-volume circuit board production. This product falls under tariff item 8543.30.00 as it is a machine or apparatus for electroplating.

Anodizing Power Supply

High-current DC power supply specifically designed for aluminum anodizing processes, creating oxide layers for corrosion resistance and decoration. Features pulse reverse current capability for specialized electroplating functions. This product falls under tariff item 8543.30.00 as apparatus for electrolysis.

Anodizing Process Controller

An electronic control unit managing voltage, current ramping, and temperature for aluminum anodizing baths, ensuring uniform oxide layer formation. This controller is specifically for anodizing, an electrolytic process. It falls under tariff item 8543.30.00 as an apparatus for electrolysis.

Battery Formation Rectifier

A multi-channel rectifier for lithium-ion battery formation, providing precise charge-discharge cycles to stabilize SEI layers during manufacturing. This rectifier is used in an electrolytic formation process. It falls under tariff item 8543.30.00 as an apparatus for electrolysis.

Black Hole Copper Plating Fixture

A conductive fixture used to initiate electroless copper 'black hole' activation on non-conductive PCB drill walls, providing an electrolytic strike layer for subsequent plating. This fixture is principally used in electroplating processes for printed circuit boards. It falls under tariff item 8543.30.00 as an apparatus for electroplating.

Cast Magnesium Anode for Underground Pipelines

Heavy-duty cast magnesium anodes with backfill bags for cathodic protection of buried natural gas and water pipelines, providing 20+ years of electrolytic protection. These anodes are consumable components used in electrolysis-based corrosion protection systems.

Cathodic Protection Rectifier

A transformer-rectifier unit for impressed current cathodic protection systems, preventing corrosion on pipelines, ships, and offshore platforms through electrolytic action. This unit is an apparatus for electrolysis. It falls under tariff item 8543.30.00 as a machine for electrolysis.

Desmear Electrolytic Etcher

An electrolytic etcher used for desmear processing of drilled PCB holes prior to plating, removing resin smear via anodic dissolution. This apparatus is specifically designed for electrolysis in circuit board production. It falls under tariff item 8543.30.00 as a machine for electrolysis.

Electrocoagulation Treatment Controller

A power management unit for wastewater treatment systems using electrolysis to generate metal coagulants for pollutant removal. This controller is an apparatus for electrolysis. It falls under tariff item 8543.30.00 as a machine for electrolysis.

Electrodialysis Power Controller

A power supply unit for electrodialysis water desalination systems, controlling DC voltage across ion-exchange membranes for salt removal. This unit is an apparatus for electrolysis. It falls under tariff item 8543.30.00 as a machine for electrolysis.

Electrolysis Hydrogen Generator Power Supply

A high-current DC power supply optimized for PEM electrolyzers that split water into hydrogen and oxygen via electrolysis for clean energy applications. This specialized apparatus provides the precise electrical control required for the electrolysis process, falling under tariff item 8543.30.00 for machines and apparatus for electrolysis.

Electrolytic Capacitor Forming Rectifier

A precision rectifier for electrolytic capacitor manufacturing, providing controlled voltage ramping for oxide layer formation on anodes. This specialized electroplating equipment for electronics production falls under tariff item 8543.30.00 as a machine for electrolysis.

Electrolytic Etching Power Supply

A controlled DC supply for electrochemical etching of titanium and refractory metals for aerospace components and medical implants. This specialized electrolysis apparatus falls under tariff item 8543.30.00 for machines and apparatus for electrolysis.

Electrophoresis Power Supply Unit

A precision power supply for gel electrophoresis equipment used in molecular biology labs, providing constant voltage or current with programmable parameters for protein/DNA separation. This apparatus falls under tariff item 8543.30.00 as a machine for electrophoresis.

Electrophoretic Photoresist Coater

An apparatus that applies electrophoretic photoresist coatings to PCB substrates via electric field deposition, used for solder mask application in multilayer circuit board fabrication. This machine is designed exclusively for electrophoretic coating in electronics manufacturing. It falls under tariff item 8543.30.00 as an apparatus for electrophoresis.

Electrowinning Cell Controller

Electrical control unit for copper and gold electrowinning cells, recovering metals from leach solutions via electrolysis. Provides cell voltage monitoring and specialized mining electrolysis functions. This product is classified under tariff item 8543.30.00 as apparatus for electrolysis.

Electrowinning Cell Power Supply

A high-amperage rectifier for electrowinning precious metals from cyanide or acid solutions in mining operations, recovering gold, silver, and copper. This specialized electrolysis equipment falls under tariff item 8543.30.00 for machines and apparatus for electrolysis.

Extruded Magnesium Anode Rod for Water Heaters

A cylindrical extruded magnesium anode rod installed in domestic water heaters to prevent tank corrosion through electrolytic protection, typically 3/4-inch diameter with steel core for mounting. This consumable anode falls under tariff item 8543.30.00 as part of an electrolysis-based protection system.

Galvanic Anodizing Controller

Process controller for hard anodizing of aluminum aircraft components using sulfuric acid electrolytes. Provides ramped voltage profiles and multi-channel current monitoring for aerospace quality Type III anodizing. This product falls under tariff item 8543.30.00 as apparatus for electrolysis.

High-Density Magnesium Anode for Ship Rudders

Engineered high-density magnesium anodes bolted to ship rudders for maximum current output in cathodic protection systems, with MIL-spec construction for naval vessels. These specialized marine anodes fall under tariff item 8543.30.00 for electrolysis-based corrosion control.

High-Purity Magnesium Slab Anode for Electroplating Tanks

Rectangular slab magnesium anodes (99.9% purity) used in industrial electroplating tanks to maintain electrolyte balance and protect tank linings, suspended via stainless steel hooks. These anodes fall under tariff item 8543.30.00 as components of electroplating systems.

Industrial Electroplating Rectifier

A DC power supply unit designed specifically for electroplating processes, converting AC to adjustable DC voltage and current for metal deposition in industrial plating tanks. It falls under tariff item 8543.30.00 as a machine for electroplating.

Laboratory Electroplating Power Supply

A benchtop DC power supply with precise current control (0.1mA resolution) for research electroplating of thin films and microelectrodes. This specialized laboratory electrolysis apparatus falls under tariff item 8543.30.00.

Magnesium Anode for Electrocoagulation Water Treatment

Sacrificial magnesium plate anodes used in electrocoagulation wastewater treatment systems to generate coagulant ions for pollutant removal, with modular design for continuous operation. These anodes fall under tariff item 8543.30.00 for electrolytic treatment apparatus.

Magnesium Anode Mesh for Electrolysis Cells

Expanded metal magnesium anode mesh designed for use in industrial electrolysis cells, particularly in metal recovery processes. Its high void ratio allows efficient electrolyte circulation, maximizing surface area for electrochemical reactions. This product is classified under tariff item 8543.30.00 as machinery and apparatus for electrolysis.

Magnesium Bracelet Anode for Offshore Platforms

Circular bracelet-style magnesium anode with cable attachment, used for cathodic protection of offshore oil platform legs and pipelines. Designed for high-current output in seawater electrolysis, it corrodes preferentially to protect steel structures. This product falls under tariff item 8543.30.00 as apparatus for electrolysis.

Magnesium Condenser Anode Plates

Flat plate magnesium anodes bolted inside HVAC condenser units to prevent electrolytic corrosion of copper cooling coils. Standard size for 3-5 ton residential units, these anodes are consumed over time to protect the coils. Classified under tariff item 8543.30.00 as apparatus for electrolysis.

Magnesium Pencil Anode for Marine Propellers

Slim pencil-shaped magnesium anode screwed into marine propeller hubs for localized cathodic protection against galvanic corrosion. Common in recreational boats and workboats, this anode is consumed preferentially to protect the propeller. This product is classified under tariff item 8543.30.00 as apparatus for electrolysis.

Magnesium Ribbon Anode for Electrolysis Lab

High-purity magnesium ribbon anode wound on spools, used in laboratory electrolysis experiments for sacrificial anode protection and hydrogen gas generation. Suitable for educational or research settings, this product is classified under tariff item 8543.30.00 as apparatus for electrolysis.

Magnesium Sacrificial Anode for Storage Tanks

T-shaped magnesium anodes for internal cathodic protection of above-ground fuel and chemical storage tanks. Provides uniform current distribution to prevent corrosion of the tank interior. This product falls under tariff item 8543.30.00 as apparatus for electrolysis.

Microelectrodeposition Controller

A nanoscale current control unit for LIGA microfabrication and MEMS electrodeposition, used in semiconductor and sensor manufacturing. This precision electroplating apparatus falls under tariff item 8543.30.00 for machines and apparatus for electroplating.

PCB Electroplating Rectifier Controller

A digital rectifier power supply controller optimized for pulse plating in PCB gold finger finishing processes, providing precise current waveforms for high-density interconnect boards. This controller is an electrical apparatus for electroplating. It falls under tariff item 8543.30.00 as a machine for electroplating.

PCB Panel Carrier Electrodes

Contact electrodes mounted on PCB panel carriers for electrolytic plating contact during panel processing, ensuring uniform current distribution across large production panels. These electrodes are specifically designed for electroplating in PCB manufacturing. They fall under tariff item 8543.30.00 as parts of electroplating apparatus.

Photoresist Developer Nozzle Assembly

A precision nozzle assembly designed for dispensing liquid photoresist developer in PCB manufacturing lines, featuring electrochemical-resistant materials for use in electrolytic development processes. This assembly is used principally in electrolytic desmear or development. It falls under tariff item 8543.30.00 as an apparatus for electrolysis.

Pulse Plating Generator

A pulse-reverse power supply for electroplating applications requiring controlled metal deposition rates, used in electronics manufacturing for uniform plating. This specialized electroplating apparatus falls under tariff item 8543.30.00.

Pulse Plating Generator for PCBs

A programmable pulse plating generator delivering controlled current waveforms for multilayer PCB plating, critical for achieving required deposit morphology in circuit fabrication. This generator is an electrical apparatus for electroplating. It falls under tariff item 8543.30.00 as a machine for electroplating.

Sacrificial Anode Power Supply

A TR unit maintaining optimal current for sacrificial anode cathodic protection systems on buried pipelines and storage tanks. This electrolysis-based corrosion control apparatus falls under tariff item 8543.30.00.

Sacrificial Magnesium Hull Anode

Consumable magnesium anode designed for cathodic protection of marine vessel hulls during electrolysis in saltwater environments. It attaches to the ship's hull and corrodes preferentially to protect the steel structure. This product is classified under tariff item 8543.30.00 as apparatus for electrolysis.