| 9000 | OPTICAL, PHOTOGRAPHIC, CINEMATOGRAPHIC, MEASURING, CHECKING, PRECISION, MEDICAL OR SURGICAL INSTRUMENTS AND APPARATUS; PARTS AND ACCESSORIES THEREOF | |
| 9001 | Optical fibres and optical fibre bundles; optical fibre cables other than those of heading 8544; sheets and plates of polarising material; lenses (including contact lenses), prisms, mirrors and other optical elements, of any material, unmounted, other than such elements of glass not optically worked |  Ontological structure of 9001 |
| 9002 | Lenses, prisms, mirrors and other optical elements, of any material, mounted, being parts of or fittings for instruments or apparatus, other than such elements of glass not optically worked | Ontological structure of 9002 |
| 9003 | Frames and mountings for spectacles, goggles or the like, and parts thereof | Ontological structure of 9003 |
| 9004 | Spectacles, goggles and the like, corrective, protective or other | Ontological structure of 9004 |
| 9005 | Binoculars, monoculars, other optical telescopes, and mountings therefor; other astronomical instruments and mountings therefor, but not including instruments for radio-astronomy | Ontological structure of 9005 |
| 9006 | Photographic (other than cinematographic) cameras; photographic flashlight apparatus and flashbulbs other than discharge lamps of heading 8539 | Ontological structure of 9006 |
| 9007 | Cinematographic cameras and projectors, whether or not incorporating sound recording or reproducing apparatus | Ontological structure of 9007 |
| 9008 | Image projectors, other than cinematographic; photographic (other than cinematographic) enlargers and reducers | Ontological structure of 9008 |
| 9010 | Apparatus and equipment for photographic (including cinematographic) laboratories, not specified or included elsewhere in this chapter; negatoscopes; projection screens | Ontological structure of 9010 |
| 9011 | Compound optical microscopes, including those for photomicrography, cinephotomicrography or microprojection | Ontological structure of 9011 |
| 9012 | Microscopes other than optical microscopes; diffraction apparatus | Ontological structure of 9012 |
| 9013 | Lasers, other than laser diodes; other optical appliances and instruments, not specified or included elsewhere in this chapter | Ontological structure of 9013 |
| 9014 | Direction finding compasses; other navigational instruments and appliances | Ontological structure of 9014 |
| 9015 | Surveying (including photogrammetrical surveying), hydrographic, oceanographic, hydrological, meteorological or geophysical instruments and appliances, excluding compasses; rangefinders | Ontological structure of 9015 |
| 9016 | Balances of a sensitivity of 5 cg or better, with or without weights | Ontological structure of 9016 |
| 9017 | Drawing, marking-out or mathematical calculating instruments (for example, drafting machines, pantographs, protractors, drawing sets, slide rules, disc calculators); instruments for measuring length, for use in the hand (for example, measuring rods and tapes, micrometers, callipers), not specified or included elsewhere in this chapter | Ontological structure of 9017 |
| 9018 | Instruments and appliances used in medical, surgical, dental or veterinary sciences, including scintigraphic apparatus, other electromedical apparatus and sight-testing instruments | Ontological structure of 9018 |
| 9019 | Mechano-therapy appliances; massage apparatus; psychological aptitude-testing apparatus; ozone therapy, oxygen therapy, aerosol therapy, artificial respiration or other therapeutic respiration apparatus | Ontological structure of 9019 |
| 9020 | Other breathing appliances and gas masks, excluding protective masks having neither mechanical parts nor replaceable filters | Ontological structure of 9020 |
| 9021 | Orthopaedic appliances, including crutches, surgical belts and trusses; splints and other fracture appliances; artificial parts of the body; hearing aids and other appliances which are worn or carried, or implanted in the body, to compensate for a defect or disability | Ontological structure of 9021 |
| 9022 | Apparatus based on the use of X-rays or of alpha, beta, gamma or other ionising radiation, whether or not for medical, surgical, dental or veterinary uses, including radiography or radiotherapy apparatus, X-ray tubes and other X-ray generators, high tension generators, control panels and desks, screens, examination or treatment tables, chairs and the like | Ontological structure of 9022 |
| 9023 | Instruments, apparatus and models, designed for demonstrational purposes (for example, in education or exhibitions), unsuitable for other uses | Ontological structure of 9023 |
| 9024 | Machines and appliances for testing the hardness, strength, compressibility, elasticity or other mechanical properties of materials (for example, metals, wood, textiles, paper, plastics) | Ontological structure of 9024 |
| 9025 | Hydrometers and similar floating instruments, thermometers, pyrometers, barometers, hygrometers and psychrometers, recording or not, and any combination of these instruments | Ontological structure of 9025 |
| 9026 | Instruments and apparatus for measuring or checking the flow, level, pressure or other variables of liquids or gases (for example, flow meters, level gauges, manometers, heat meters), excluding instruments and apparatus of heading 9014, 9015, 9028 or 9032 | Ontological structure of 9026 |
| 9027 | 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 | Ontological structure of 9027 |
| 9028 | Gas, liquid or electricity supply or production meters, including calibrating meters therefor | Ontological structure of 9028 |
| 9029 | Revolution counters, production counters, taximeters, milometers, pedometers and the like; speed indicators and tachometers, other than those of heading 9014 or 9015; stroboscopes | Ontological structure of 9029 |
| 9030 | Oscilloscopes, spectrum analysers and other instruments and apparatus for measuring or checking electrical quantities, excluding meters of heading 9028; instruments and apparatus for measuring or detecting alpha, beta, gamma, X-ray, cosmic or other ionising radiation | Ontological structure of 9030 |
| 9031 | Measuring or checking instruments, appliances and machines, not specified or included elsewhere in this chapter; profile projectors | Ontological structure of 9031 |
| 9032 | Automatic regulating or controlling instruments and apparatus | Ontological structure of 9032 |
| 9033 | Parts and accessories (not specified or included elsewhere in this chapter) for machines, appliances, instruments or apparatus of Chapter 90 | Ontological structure of 9033 |