Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 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: > Other: > Other: > Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 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 9027.90.84.00
Sound Level Meter Microphone
Type 1 precision condenser microphone for integrating sound level meters (9027.30 for sound measuring instruments). Calibrated to IEC 61672 standards. 9027.90.84.00 replacement part.
HPLC Column Cartridge
A disposable cartridge packed with stationary phase for high-performance liquid chromatography systems (subheading 9027.30). Essential for separating and analyzing compounds in pharmaceutical testing. Classified as 9027.90.84.00 accessory for liquid chromatographs.
Spectrometer Sample Holder
Adjustable holder for solid/liquid samples in optical spectrometers (9027.50). Precision-machined aluminum with alignment features. 9027.90.84.00 accessory for emission/absorption spectroscopy.
Microtome Disposable Blade
High-carbon steel disposable blade for paraffin-embedded tissue sectioning in rotary microtomes (subheading 9027.90.30 microtomes themselves, but blades as parts). Feather or Leica-style for pathology labs. Under 9027.90.84.00 as accessory.
Refractometer Prism Assembly
Sapphire prism with calibration scale for Abbe refractometers (9027.20). Critical for measuring refractive index of liquids. Classified 9027.90.84.00 as dedicated optical component.
Porosimeter Sample Stage
Precision stage for mercury intrusion porosimeters (9027.89) measuring pore size distribution. Includes vacuum seals and positioning controls. 9027.90.84.00 accessory for porosity testers.
Light Meter Photodiode Sensor
Silicon photodiode detector for illuminance/luminance meters (9027.30). Cosine-corrected with spectral response matching human vision. Classified as 9027.90.84.00 light measurement accessory.
Chromatography Vial Rack
AutSampler-compatible rack holding 1.5mL vials for GC/LC autosamplers (9027.30). Precision-machined PEEK or aluminum. 9027.90.84.00 dedicated accessory.
Spectrometer Lamp Housing
Deuterium/tungsten lamp housing with alignment optics for UV-Vis spectrometers (9027.50). Thermal management and interlock safety. 9027.90.84.00 replaceable module.
Viscosimeter Measuring Cell
Capillary Ubbelohde-style glass cell for kinematic viscosity measurement (9027.50). Suspended level design with calibration constant. Principal 9027.90.84.00 part.
Spectrophotometer Quartz Cuvette
A precision quartz cuvette designed for holding liquid samples in UV-Vis spectrophotometers of subheading 9027.50. Made from high-purity quartz to transmit UV light accurately, it is an essential accessory for spectroscopic analysis in laboratories. Classified under 9027.90.84.00 as a dedicated part for spectrophotometers.
Gas Chromatograph Injector Liner
A replaceable glass or quartz liner for the injection port of gas chromatographs (subheading 9027.30). It vaporizes samples for separation analysis and must withstand high temperatures. Falls under 9027.90.84.00 as a principal accessory for GC instruments.
Viscometer Spindle Set
Interchangeable spindles for rotational viscometers (subheading 9027.50) used to measure fluid viscosity in quality control. Constructed from stainless steel or Hastelloy for chemical resistance. 9027.90.84.00 part due to principal use with viscosity instruments.
pH Meter Electrode
Glass membrane electrode for precision pH meters and ion analyzers (subheading 9027.81). Features refillable reference electrolyte for lab and field use. Classified 9027.90.84.00 as principal part of chemical analysis apparatus.
Gas Analyzer Probe
Heated stainless steel probe for extracting hot gas samples in stack emissions analyzers (9027.81). Includes filtration and temperature control. 9027.90.84.00 part for gas analysis apparatus.