Of articles of subheading 9027.20.50
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: > Other: > Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89 > Of articles of subheading 9027.20.50
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 9027.90.56.25
GC Oven Fan Motor
Precision fan motor circulating air in chromatography oven columns for uniform heating in 9027.20.50 instruments. Electrical accessory essential for temperature accuracy. Under 9027.90.5625 classification.
Split/Splitless Injector Body
Machined stainless steel injector body for GC split/splitless modes in 9027.20.50 apparatus, housing septum and liner. Electrical heater mount included. Principal part classified in 9027.90.5625.
Chromatography Oven Temperature Sensor
This temperature sensor is a replacement part specifically designed for gas chromatography ovens used in chemical analysis instruments classified under HTS 9027.20.50. It measures and maintains precise temperatures essential for chromatographic separations. As a dedicated accessory for these electrical analytical apparatus, it falls under 9027.90.5625 per Chapter 90 classification rules for parts.
GC Injection Port Liner
A consumable quartz liner for the injection port of gas chromatographs (HTS 9027.20.50), essential for sample vaporization in chemical analysis. Made of high-purity materials to prevent contamination during analysis. Classified as a part under 9027.90.5625 due to its exclusive use in these electrical analytical instruments.
Gas Chromatograph Column Heater Module
Modular heating element for maintaining temperature gradients in GC capillary columns, integral to instruments of subheading 9027.20.50. Ensures reproducible separation results in physical/chemical analysis. Falls under 9027.90.5625 as an electrical part principally used with these apparatus.
Mass Spectrometer Interface Kit for GC
Transfer line and heater kit connecting gas chromatographs (9027.20.50) to mass spectrometers for combined GC-MS analysis. Maintains sample integrity during ionization transition. Classified in 9027.90.5625 as accessory principally for these chemical analysis instruments.
GC Detector Flame Ionization Filament
Replacement igniter filament for FID detectors in gas chromatographs of HTS 9027.20.50, critical for organic compound detection via ionization. Electrical component dedicated to chemical analysis apparatus. Covered by 9027.90.5625 parts provision.
Autosampler Syringe Heater
Precision heater for GC autosampler syringes, preventing sample condensation in instruments of 9027.20.50. Maintains optimal viscosity for injection accuracy. Electrical accessory classified under 9027.90.5625.
Chromatography Data Acquisition Board
Electronic circuit board for signal processing in gas chromatographs (9027.20.50), converting detector outputs to digital data. Integral electrical part for analytical quantification. Falls under 9027.90.5625 per Chapter 90 parts rules.
Thermal Conductivity Detector Filament Assembly
Tungsten-rhenium filament assembly for TCD detectors in gas chromatographs (9027.20.50), measuring thermal conductivity differences. Replaceable electrical sensing element. Classified 9027.90.5625.