Printed circuit assemblies for the goods of subheading 9027.81 or 9027.89
Instruments and apparatus for physical or chemical analysis (for example, polarimeters, refractometers, spectrometers, gas or smoke analysis apparatus); instruments and apparatus for measuring or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes; parts and accessories thereof: > Microtomes; parts and accessories: > Parts and accessories: > Of electrical instruments and apparatus: > Printed circuit assemblies for the goods of subheading 9027.81 or 9027.89
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 9027.90.45.00
Smoke Detection Analyzer Control PCB
Printed circuit board assembly dedicated to smoke analysis apparatus under subheading 9027.81, featuring particle detection algorithms and alarm interfaces. This component processes optical and ionization sensor signals for industrial smoke monitoring systems. It falls under 9027.90.4500 as a specialized electrical part for physical/chemical analysis instruments.
Spectrometer Signal Processing PCB
This PCB assembly processes spectral data for gas chromatograph-mass spectrometers under 9027.89, including ADC converters and FPGA for peak analysis. Designed exclusively for chemical composition analysis apparatus. Classified as printed circuit assemblies for physical/chemical analysis instruments per HTS 9027.90.4500.
Infrared Gas Analyzer Interface PCB
Interface board for NDIR (Non-Dispersive Infrared) gas analyzers under 9027.81, featuring optical sensor amplification and concentration calculation circuits. Essential for CO2, CO, and hydrocarbon measurement in HVAC systems. Falls under printed circuit assemblies for gas analysis apparatus.
Laboratory HPLC Detector Electronics Board
Electronics PCB for High-Performance Liquid Chromatography UV detectors classified under 9027.89 chemical analysis apparatus. Handles lamp control, photodetector signal processing, and peak integration. Specific design for laboratory chromatographic instruments qualifies it for 9027.90.4500.
Mass Spectrometer Ion Source Control Board
Control PCB for mass spectrometer ion source power supplies and timing circuits under HTS 9027.89 chemical analysis apparatus. Manages filament current, extraction voltages, and quadrupole control for molecular identification. Essential electrical assembly for advanced analytical instruments.
VOC Emissions Portable Analyzer PCB
Compact PCB for handheld VOC (Volatile Organic Compound) analyzers under 9027.81, integrating photoionization detection and PID lamp control. Designed for field industrial hygiene monitoring. Printed circuit assembly specific to portable gas analysis apparatus.
Process Gas Chromatograph Interface Board
Interface PCB connecting process gas chromatographs (9027.89) to plant DCS systems, featuring analog I/O, Profibus, and oven temperature control circuits. Used in petrochemical refineries for continuous composition analysis. Classifies as printed circuit assembly for chemical analysis instruments.
Combustion Analyzer Oxygen Sensor PCB
Signal conditioning PCB for zirconia oxygen sensors in combustion efficiency analyzers (HTS 9027.81). Provides reference air pump control, thermocouple compensation, and lambda calculation. Dedicated electrical assembly for boiler efficiency gas analysis.
Pharmaceutical Purity Gas Analyzer Board
Precision PCB for headspace gas analyzers (9027.81) used in pharmaceutical packaging integrity testing, featuring helium leak detection circuits and moisture analysis. Ensures compliance with USP <1207> container closure standards. Printed circuit for physical/chemical analysis instruments.
Multi-Component FTIR Analyzer Controller
Controller PCB for Fourier Transform Infrared gas analyzers (9027.89), managing interferometer mirror position, DTGS detector readout, and spectral processing. Used for simultaneous multi-gas identification in clean room environments. Printed circuit for advanced chemical analysis apparatus.
Gas Analyzer Printed Circuit Board Assembly
This printed circuit assembly is a core component for electrical gas or smoke analysis instruments classified under HTS 9027.81. It handles signal processing, data acquisition, and interface functions essential for measuring gas concentrations in environmental monitoring equipment. The board integrates microcontrollers, sensors interfaces, and calibration circuits specific to gas analyzers.
Environmental Gas Monitor Mainboard
Main control printed circuit assembly for continuous gas monitoring stations (HTS 9027.81), integrating multiple sensor inputs, data logging, and Modbus interfaces. Critical for industrial emissions analysis and compliance testing. This specialized board qualifies under 9027.90.4500 for gas analysis instrument parts.
Flue Gas Emissions Analyzer Processor
Processor PCB for stationary flue gas analyzers (9027.81) used in power plants and incinerators, featuring multi-gas calibration and stack flow compensation algorithms. Processes O2, CO, NOx, SO2 measurements simultaneously. Printed circuit assembly dedicated to industrial gas analysis instruments.
Stack Gas Velocity Measurement Electronics
PCB assembly for thermal anemometer-based stack gas velocity sensors integrated with analyzers (9027.81). Calculates mass flow rates when paired with gas concentration data for EPA compliance reporting. Electrical part specific to emissions analysis instruments.