Skip Main Navigation Skip To Navigation Content

Foreign Trade

Skip top of page navigation
You are here: Census.govBusiness & IndustryForeign Trade › Definitions
Skip top of page navigation
Section XVIII - Chapter 90
Optical, Photographic, Cinematographic, Measuring, Checking, Precision, Medical or Surgical Instruments and Apparatus; Parts and Accessories Thereof
Notes
1. This chapter does not cover:
(a). Articles of a kind used in machines, appliances or for other technical uses, of vulcanized rubber other than hard rubber (heading 4016), of leather or of composition leather (heading 4205) or of textile material (heading 5911);
(b). Supporting belts or other support articles of textile material, whose intended effect on the organ to be supported or held derives solely from their elasticity (for example, maternity belts, thoracic support bandages, abdominal support bandages, supports for joints or muscles) (section XI);"
(c). Refractory goods of heading 6903; ceramic wares for laboratory, chemical or other technical uses of heading 6909;
(d). Glass mirrors, not optically worked, of heading 7009, or mirrors of base metal or of precious metal, not being optical elements (heading 8306 or chapter 71);
(e). Goods of heading 7007, 7008, 7011, 7014, 7015 or 7017;
(f). Parts of general use, as defined in note 2 to section XV, of base metal (section XV) or similar goods of plastics (chapter 39);
(g). Pumps incorporating measuring devices, of heading 8413; weight-operated counting or checking machinery, and separately presented weights for balances (heading 8423); lifting or handling machinery (headings 8425 to 8428); paper or paperboard cutting machine s of all kinds (heading 8441); fittings for adjusting work or tools onmachine tools, of heading 8466, including fittings with optical devices for readingthe scale (for example, "optical" dividing heads) but not those which are in themselves essentially opt ical instruments (for example, alignment telescopes); calculating machines (heading 8470) valves and other appliances of heading 8481; machines and apparatus (including apparatus for the projection or drawing of circuit patterns on sensitized semiconductor materials) of heading 8486;
(h). Searchlights or spotlights of a kind used for cycles or motor vehicles (heading 8512); portable electric lamps of heading 8513; cinematographic sound recording,reproducing or re-recording apparatus (heading 8519); sound-heads (heading 8522); television cam eras, digital cameras and video camera recorders (heading 8525); radar apparatus, radio navigational aid apparatus and radio remote controlapparatus (heading 8526); connectors for optical fibers, optical fiber bundles and cables (heading 8536); numerical c ontrol apparatus (heading 8537); sealed beam lamp units of heading 8539; optical fiber cables of heading 8544;
(ij). Searchlights and spotlights of heading 9405;
(k). Articles of chapter 95;
(l). Capacity measures, which are to be classified according to their constituent material; or
(m). Spools, reels or similar supports (which are to be classified according to their constituent material for example, in heading 3923 or section XV).
2. Subject to note 1 above, parts and accessories for machines, apparatus, instruments or articles of this chapter are to be classified according to the following rules:
(a). Parts and accessories which are goods included in any of the headings of this chapter or of chapter 84, 85 or 91 (other than heading 8487, 8548 or 9033) are in all cases to be classified in their respective headings;
(b). Other parts and accessories, if suitable for use solely or principally with a particular kind of machine, instrument or apparatus, or with a number of machines, instruments or apparatus of the same heading (including a machine, instrument or apparatus of h eading of 9010, 9013 or 9031) are to be classified with the machines, instruments or apparatus of that kind;
(c). All other parts and accessories are to be classified in heading 9033.
3. The provisions of notes 3 and 4 to section XVI apply also to this chapter.
4. Heading 9005 does not apply to telescopic sights for fitting to arms, periscopic telescopes for fitting to submarines or tanks, or to telescopes for machines, appliances, instruments or apparatus of this chapter or section XVI; such telescopic sights and t elescopes are to be classified in heading 9013.
5. Measuring or checking optical instruments, appliances or machines which, but for this note, could be classified both in heading 9013 and in heading 9031 are to be classified in heading 9031.
6. For the purposes of heading 9021, the expression orthopedic appliances means appliances for:
(a). Preventing or correcting bodily deformities; or
(b). Supporting or holding parts of the body following an illness, operations or injury.

Orthopedic appliances include footwear and special insoles designed to correct orthopedic conditions, provided that they are either (1) made to measure or (2) mass-produced, entered singly and not in pairs and designed to fit either foot equally.

7. Heading 9032 applies only to:
(a). Instruments and apparatus for automatically controlling the flow, level, pressure or other variables of liquids or gases, or for automatically controlling temperature, whether or not their operation depends on an electrical phenomenon which varies accordin g to the factor to be automatically controlled, which are designed to bring this factor to, and maintain it at, a desired value, stabilized against disturbances, by constantly or periodically measuring its actual value.
(b). Automatic regulators of electrical quantities, and instruments or apparatus for automatically controlling non-electrical quantities the operation of which depends on an electrical phenomenon varying according to the factor to be controlled, which are desig ned to bring this factor to, and maintain it at, a desired value, stabilized against disturbances, by constantly or periodically measuring its actual value.
Statistical Notes
1. For statistical reporting purposes under subheading 9001.10, the unit of quantity "fib m" (fiber meters), as it pertains to optical fiber bundles and cables, is determined by multiplying the number of individual fibers contained therein by the length in me ters.
2. For the purpose of headings 9001 and 9002, the term "optically worked" refers to glass the surface of which has been ground or polished in order to produce the required optical properties.
3. For the purpose of this chapter, the term "electrical" when used in reference to instruments, appliances, apparatus and machines, refers to those articles the operation of which depends on an electrical phenomenon which varies according to the factor to be ascertained.
4. For the purpose of this chapter, the terms "optical appliances" and "optical instruments" refer only to those appliances and instruments which incorporate one or more optical elements, but do not include any appliances or instruments in which the incorpora ted optical elements are solely for viewing a scale or for some other subsidiary purpose.

Schedule B No. and Headings Commodity Description Unit of Quantity Second Quantity
90 Optical, Photographic, Cinematographic, Measuring, Checking, Precision, Medical or Surgical Instruments and Apparatus; Parts and Accessories Thereof
90.01 - Optical fibers and optical fiber bundles; optical fiber cables other than those of heading 8544; sheets and plates of polarizing material; lenses (including contact lenses), prisms, mirrors and other optical elements, of any material, unmounted, other th an such elements of glass not optically worked:
9001.10.0000 - - Optical fibers, optical fiber bundles and cables Fib m
9001.20.0000 - - Sheets and plates of polarizing material kg
9001.30.0000 - - Contact lenses No.
9001.40.0000 - - Spectacle lenses of glass Prs
9001.50.0000 - - Spectacle lenses of other materials Prs
9001.90 - - Other:
9001.90.1000 - - - Lenses, prisms, and mirrors X
9001.90.7000 - - - Other X
90.02 - 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; parts and accessories thereof:
- - Objective lenses and parts and accessories thereof:
9002.11 - - - For cameras, projectors or photographic enlargers or reducers:
9002.11.4000 - - - - Projection No.
- - - - Other:
9002.11.6000 - - - - - Mounted lenses suitable for use in, and exported separately from, closed-circuit television cameras, with or without attached electrical or non- electrical closed-circuit television camera connectors, and with or without attached motors No.
9002.11.9000 - - - - - Other X
9002.19.0000 - - - Other X
9002.20 - - Filters and parts and accessories thereof:
9002.20.4000 - - - Photographic X
9002.20.8000 - - - Other X
9002.90.0000 - - Other X
90.03 - Frames and mountings for spectacles, goggles or the like, and parts thereof:
- - Frames and mountings:
9003.11.0000 - - - Of plastics Doz
9003.19.0000 - - - Of other materials Doz
9003.90.0000 - - Parts X
90.04 - Spectacles, goggles and the like, corrective, protective or other:
9004.10.0000 - - Sunglasses Doz
9004.90.0000 - - Other Doz
90.05 - Binoculars, monoculars, other optical telescopes, and mountings therefor; other astronomical instruments and mountings therefor, but not including instruments for radio-astronomy; parts and accessories thereof:
9005.10 - - Binoculars:
9005.10.0020 - - - Prism binoculars for use with infrared light No.
9005.10.0040 - - - Other prism binoculars No.
9005.10.0080 - - - Other No.
9005.80 - - Other instruments:
- - - Optical telescopes:
9005.80.4020 - - - - For use with infrared light No.
9005.80.4040 - - - - Other No.
9005.80.6000 - - - Other No.
9005.90.0000 - - Parts and accessories (including mountings) X
90.06 - Photographic (other than cinematographic) cameras; photographic flashlight apparatus and flashbulbs other than discharge lamps of heading 8539; parts and accessories thereof:
9006.10.0000 - - Cameras of a kind used for preparing printing plates or cylinders No.
9006.30.0000 - - Cameras specially designed for underwater use, for aerial survey or for medical or surgical examination of internal organs; comparison cameras for forensic or criminological purposes No.
9006.40.0000 - - Instant print cameras No.
- - Other cameras:
9006.51.0000 - - - With a through-the-lens viewfinder (single lens reflex (SLR)), for roll film of a width not exceeding 35 mm (1.4 inch) No.
9006.52.0002 - - - Other, for roll film of a width less than 35 mm (1.4 inch) No.
9006.53.0002 - - - Other, for roll film of a width of 35 mm (1.4 inch) No.
9006.59.0002 - - - Other No.
- - Photographic flashlight apparatus and flashbulbs:
9006.61.0000 - - - Discharge lamp ("electronic") flashlight apparatus No.
9006.69 - - - Other:
9006.69.0110 - - - - Flashbulbs, flashcubes, and the like No.
9006.69.0150 - - - - Other X
- - Parts and accessories:
9006.91.0000 - - - For cameras X
9006.99.0000 - - - Other X
90.07 - Cinematographic cameras and projectors, whether or not incorporating sound recording or reproducing apparatus; parts and accessories thereof:
9007.10.0000 - - Cameras No.
9007.20 - - Projectors:
9007.20.4050 - - - For film of less than 16mm (0.6 inch) in width No.
9007.20.8050 - - - Other No.
- - Parts and accessories:
9007.91.0000 - - - For cameras X
9007.92.0000 - - - For projectors X
90.08 - Image projectors, other than cinematographic; photographic (other than cinematographic) enlargers and reducers; parts and accessories thereof:
9008.50 - - Projectors, enlargers and reducers:
9008.50.1000 - - - Slide projectors No.
- - - Microfilm, microfiche or other microform readers, whether or not capable of producing copies:
9008.50.2000 - - - - Capable of producing copies No.
9008.50.3000 - - - - Other No.
9008.50.4000 - - - Other image projectors No.
9008.50.5000 - - - Photographic (other than cinematographic) enlargers and reducers No.
9008.90.0000 - - Parts and accessories X
90.10 - Apparatus and equipment for photographic (including cinemato- graphic) laboratories, not specified or included elsewhere in this chapter; negatoscopes; projection screens; parts and accessories thereof:
9010.10.0000 - - Apparatus and equipment for automatically developing photographic (including cinematographic) film or paper in rolls or for automatically exposing developed film to rolls of photographic paper X
9010.50 - - Other apparatus and equipment for photographic (including cinematographic) laboratories; negatoscopes:
9010.50.1000 - - - Contact printers No.
9010.50.2000 - - - Developing tanks No.
- - - Photographic film viewers, titlers, splicers and editors, all the foregoing and combinations thereof:
- - - - Articles containing an optical lens or designed to contain such a lens:
9010.50.3000 - - - - - Editors and combination editor-splicers, for cinematographic film X
9010.50.4000 - - - - - Other X
9010.50.5000 - - - - Other X
9010.50.6000 - - - Other X
9010.60.0000 - - Projection screens No.
9010.90.0002 - - Parts and accessories X
90.11 - Compound optical microscopes, including those for photomicro- graphy, cinephotomicrography or microprojection; parts and accessories thereof:
9011.10.0000 - - Stereoscopic microscopes No.
9011.20.0000 - - Other microscopes, for photomicrography, cinephotomicro- graphy or microprojection No.
9011.80.0000 - - Other microscopes No.
9011.90.0000 - - Parts and accessories X
90.12 - Microscopes other than optical microscopes; diffraction apparatus; parts and accessories thereof:
9012.10.0000 - - Microscopes other than optical microscopes; and diffraction apparatus X
9012.90.0000 - - Parts and accessories X
90.13 - Liquid crystal devices not constituting articles provided for more specifically in other headings; lasers, other than laser diodes; other optical appliances and instruments, not
specified or included elsewhere in this chapter; parts and accessories thereof:
9013.10 - - Telescopic sights for fitting to arms; periscopes; telescopes designed to form parts of machines, appliances, instruments or apparatus of this chapter or Section XVI:
9013.10.2000 - - - Telescopic sights for rifles No.
9013.10.4000 - - - Other No.
9013.20.0000 - - Lasers, other than laser diodes No.
9013.80.0000 - - Other devices, appliances and instruments X
9013.90.0000 - - Parts and accessories X
90.14 - Direction finding compasses; other navigational instruments and appliances; parts and accessories thereof:
9014.10 - - Direction finding compasses:
- - - Other:
- - - - Gyroscopic compasses, other than electrical:
9014.10.6040 - - - - - For use in civil aircraft No.
9014.10.6080 - - - - - Other No.
- - - - Other:
- - - - - Gyroscopic compasses, electrical:
9014.10.7040 - - - - - - For use in civil aircraft No.
9014.10.7080 - - - - - - Other No.
- - - - - Other:
9014.10.9040 - - - - - - For use in civil aircraft No.
9014.10.9080 - - - - - - Other No.
- - - Optical instruments:
9014.10.1040 - - - - For use in civil aircraft No.
9014.10.1080 - - - - Other No.
9014.20 - - Instruments and appliances for aeronautical or space navigation (other than compasses):
9014.20.2000 - - - Optical instruments and appliances No.
- - - Other:
9014.20.4000 - - - - Automatic pilots No.
- - - - Other:
9014.20.6000 - - - - - Electrical No.
- - - - - Other:
9014.20.8040 - - - - - - For use in civil aircraft No.
9014.20.8080 - - - - - - Other No.
9014.80 - - Other instruments and appliances:
9014.80.2000 - - - Ships logs and depth-sounding apparatus No.
9014.80.6000 - - - Other No.
9014.90.0000 - - Parts and accessories X
90.15 - Surveying (including photogrammetrical surveying), hydro- graphic, oceanographic, hydrological, meteorological or geo- physical instruments and appliances, excluding compasses; rangefinders; parts and accessories thereof:
9015.10.0000 - - Rangefinders No.
9015.20.0000 - - Theodolites and tachyometers (tacheometers) No.
9015.30.0000 - - Levels No.
9015.40.0000 - - Photogrammetrical surveying instruments and appliances X
9015.80 - - Other instruments and appliances:
9015.80.2000 - - - Optical instruments and appliances X
- - - Other:
9015.80.6000 - - - - Seismographs No.
- - - - Other:
9015.80.8040 - - - - - Geophysical instruments and appliances X
9015.80.8080 - - - - - Other X
9015.90.0000 - - Parts and accessories X
9016.00.0000 - Balances of a sensitivity of 5 cg or better, with or without weights; parts and accessories thereof X
90.17 - 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 t apes, micrometers, calipers), not specified or included elsewhere in this chapter; parts and accessories thereof:
9017.10.0000 - - Drafting tables and machines, whether or not automatic X
9017.20 - - Other drawing, marking-out or mathematical calculating instruments:
9017.20.4000 - - - Disc calculators, slide rules and other mathematical calculating instruments X
- - - Other:
9017.20.8040 - - - - Hand operated input devices which transmit position data to computer processors or displays (digitizers) No.
9017.20.8060 - - - - Other X
9017.30 - - Micrometers, calipers and gauges:
9017.30.4000 - - - Micrometers and calipers No.
9017.30.8000 - - - Other X
9017.80.0000 - - Other instruments X
9017.90 - - Parts and accessories:
9017.90.0110 - - - Of articles of subheading 9017.10 X
9017.90.0120 - - - Of articles of subheading 9017.20.40 X
9017.90.0136 - - - Of articles of subheading 9017.20.80 X
9017.90.0140 - - - Of articles of subheading 9017.30.40 X
9017.90.0150 - - - Of articles of subheading 9017.30.80 X
9017.90.0165 - - - Other X
90.18 - Instruments and appliances used in medical, surgical, dental or veterinary sciences, including scintigraphic apparatus, other electro-medical apparatus and sight-testing instruments; parts and accessories thereof:
- - Electro-diagnostic apparatus (including apparatus for functional exploratory examination or for checking physiological parameters); parts and accessories thereof:
9018.11 - - - Electrocardiographs, and parts and accessories thereof:
9018.11.3000 - - - - Electrocardiographs No.
9018.11.8000 - - - - Parts and accessories X
9018.12.0000 - - - Ultrasonic scanning apparatus No.
9018.13.0000 - - - Magnetic resonance imaging apparatus X
9018.14.0000 - - - Scintigraphic apparatus X
9018.19 - - - Other:
9018.19.4000 - - - - Apparatus for functional exploratory examination, and parts and accessories thereof X
- - - - Other:
9018.19.5500 - - - - - Patient monitoring systems X
9018.19.7500 - - - - - Printed circuit assemblies for parameter acquisition modules X
- - - - - Other:
9018.19.9530 - - - - - - Basal metabolism and blood pressure apparatus X
9018.19.9535 - - - - - - Electroencephalographs (EEG) and electromyographs (EMG) No.
9018.19.9550 - - - - - - Other apparatus X
9018.19.9560 - - - - - - Parts and accessories X
9018.20.0000 - - Ultraviolet or infrared ray apparatus, and parts and accessories thereof X
- - Syringes, needles, catheters, cannulae and the like; parts and accessories thereof:
9018.31 - - - Syringes, with or without needles; parts and accessories thereof:
- - - - Syringes with or without their needles:
9018.31.0040 - - - - - Hypodermic No.
9018.31.0080 - - - - - Other No.
9018.31.0090 - - - - Parts and accessories X
9018.32.0000 - - - Tubular metal needles and needles for sutures and parts and accessories thereof X
- - - Other:
9018.39.0030 - - - - Bougies, catheters, drains and sondes, and parts and accessories thereof X
9018.39.0050 - - - - Other X
- - Other instruments and appliances, used in dental sciences; and parts and accessories thereof:
9018.41.0000 - - - Dental drill engines, whether or not combined on a single base with other dental equipment, and parts and accessories thereof X
9018.49.0000 - - - Other X
9018.50.0000 - - Other ophthalmic instruments and appliances and, parts and accessories thereof X
9018.90 - - Other instruments and appliances, and parts and accessories thereof:
9018.90.1500 - - - Optical instruments and appliances and parts and accessories thereof X
- - - Other:
9018.90.3000 - - - - Anesthetic instruments and appliances and parts and accessories thereof X
9018.90.4000 - - - - Percussion hammers, stethescopes and parts of stethescopes X
9018.90.5000 - - - - Sphygmomanometers, tensimeters and oscillometers; all the foregoing and parts and accessories thereof X
- - - - Electro-medical instruments and appliances, and parts and accessories thereof:
9018.90.6000 - - - - - Electro-surgical instruments and appliances, and parts and accessories thereof X
- - - - - Other:
9018.90.7020 - - - - - - Dialysis instruments and apparatus X
- - - - - - Other therapeutic appliances and instruments:
9018.90.7040 - - - - - - - Ultrasonic X
9018.90.7060 - - - - - - - Other X
9018.90.7070 - - - - - - Parts and accessories of dialysis instruments and apparatus X
9018.90.7080 - - - - - - Other X
9018.90.8000 - - - - Other X
90.19 - Mechano-therapy appliances; massage apparatus; psychological aptitude-testing apparatus; ozone therapy, oxygen therapy, aerosol therapy, artificial respiration or other therapeutic respiration apparatus; parts and accessories thereof:
9019.10 - - Mechano-therapy appliances; massage apparatus; psychological aptitude-testing apparatus; parts and accessories thereof:
9019.10.2000 - - - Mechano-therapy appliances and massage apparatus, and parts and accessories thereof X
9019.10.5000 - - - Other X
9019.20.0000 - - Ozone therapy, oxygen therapy, aerosol therapy, artificial respiration or other therapeutic respiration apparatus; parts and accessories thereof X
90.20 - Other breathing appliances and gas masks, excluding protective masks having neither mechanical parts nor replaceable filters; parts and accessories thereof:
9020.00.4000 - - Underwater breathing devices designed as a complete unit to be carried on the person and not requiring attendants X
9020.00.8000 - - Other X
90.21 - Orthopedic 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; parts and accessories thereof:
9021.10 - - Orthopedic or fracture appliances; parts and accessories thereof:
9021.10.0050 - - - Bone plates, screws and nails, and other internal fixation devices or appliances X
9021.10.0090 - - - Other X
- - Artificial teeth and dental fittings; and parts and accessories thereof:
9021.21 - - - Artificial teeth; and parts and accessories thereof:
9021.21.4000 - - - - Of plastics X
9021.21.8000 - - - - Other X
9021.29.0000 - - - Other X
- - Other artificial parts of the body and parts and accessories thereof:
9021.31.0000 - - - Artificial joints and parts and accessories thereof X
9021.39.0000 - - - Other X
9021.40.0000 - - Hearing aids, excluding parts and accessories thereof No.
9021.50.0000 - - Pacemakers for stimulating heart muscles, excluding parts and accessories thereof No.
9021.90.0002 - - Other X
90.22 - Apparatus based on the use of X-rays or of alpha, beta or gamma radiations, 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; parts and accessories thereof:
- - Apparatus based on the use of X-rays, whether or not for medical, surgical, dental or veterinary uses, including radiography or radiotherapy apparatus:
9022.12.0000 - - - Computed tomography apparatus X
9022.13.0000 - - - Other, for dental uses X
9022.14.0000 - - - Other, for medical, surgical or veterinary uses X
9022.19.0000 - - - For other uses X
- - Apparatus based on the use of alpha, beta or gamma radiations, whether or not for medical, surgical, dental or veterinary uses, including radiography or radiotherapy apparatus:
9022.21.0000 - - - For medical, surgical, dental or veterinary uses X
9022.29 - - - For other uses:
9022.29.4000 - - - - Smoke detectors, ionization type No.
9022.29.8000 - - - - Other X
9022.30.0000 - - X-ray tubes No.
9022.90 - - Other, including parts and accessories:
9022.90.2000 - - - Other apparatus X
- - - Parts and accessories:
9022.90.4000 - - - - Of X-ray tubes X
- - - - Other:
9022.90.6000 - - - - - Of apparatus based on the use of X-rays X
9022.90.7000 - - - - - Of smoke detectors, ionization type X
9022.90.8000 - - - - - Other X
9023.00.0000 - Instruments, apparatus and models, designed for demon- strational purposes (for example, in education or exhibitions), unsuitable for other uses, and parts and accessories thereof X
90.24 - Machines and appliances for testing the hardness, strength, compressibility, elasticity or other mechanical properties of materials (for example, metals, wood, textiles, paper, plastics), and parts and accessories thereof:
9024.10.0000 - - Machines and appliances for testing metals X
9024.80.0000 - - Other machines and appliances X
9024.90.0000 - - Parts and accessories X
90.25 - Hydrometers and similar floating instruments, thermometers, pyrometers, barometers, hygrometers and psychrometers, recording or not, and any combination of these instruments; parts and accessories thereof:
- - Thermometers and pyrometers, not combined with other instruments:
9025.11 - - - Liquid-filled, for direct reading:
9025.11.2000 - - - - Clinical No.
9025.11.4000 - - - - Other No.
9025.19 - - - Other:
9025.19.4000 - - - - Pyrometers No.
- - - - Other:
9025.19.8040 - - - - - Clinical No.
9025.19.8080 - - - - - Other No.
9025.80 - - Other:
9025.80.1500 - - - Barometers, not combined with other instruments No.
9025.80.5050 - - - Other instruments No.
9025.90.0000 - - Parts and accessories X
90.26 - 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 headings 9014, 9015, 9028 or 90 32; parts and accessories thereof:
9026.10 - - For measuring or checking the flow or level of liquids:
9026.10.5000 - - - Flow meters No.
9026.10.7000 - - - Other No.
9026.20.0000 - - For measuring or checking pressure No.
9026.80.0000 - - Other instruments or apparatus No.
9026.90.0000 - - Parts and accessories X
90.27 - 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 o r the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes; parts and accessories thereof:
9027.10.0000 - - Gas or smoke analysis apparatus X
9027.20 - - Chromatographs and electrophoresis instruments:
9027.20.2000 - - - Gas chromatographs No.
9027.20.5030 - - - Electrophoresis instruments No.
9027.20.6050 - - - Liquid chromatographs No.
9027.20.9000 - - - Other No.
9027.30 - - Spectrometers, spectrophotometers and spectrographs using optical radiations (ultraviolet, visible, infrared):
- - - Electrical:
9027.30.4040 - - - - Spectrophotometers No.
9027.30.4080 - - - - Other No.
- - - Other:
9027.30.8020 - - - - Spectroscopes No.
9027.30.8080 - - - - Other No.
- - Other instruments and apparatus using optical radiations (ultraviolet, visible, infrared):
9027.50.1000 - - - Exposure meters No.
9027.50.2000 - - - Thermal analysis instruments and apparatus No.
9027.50.4050 - - - Photometers No.
9027.50.5000 - - - Chemical analysis instruments and apparatus No.
9027.50.9000 - - - Other No.
9027.80 - - Other instruments and apparatus:
9027.80.2500 - - - Nuclear magnetic resonance instruments and apparatus (except those of heading 9018) No.
9027.80.2600 - - - Mass spectrometers No.
- - - Chemical analysis instruments and apparatus:
9027.80.3100 - - - - Electrochemical instruments and apparatus No.
9027.80.3200 - - - - Other No.
9027.80.3500 - - - Physical analysis instruments and apparatus No.
9027.80.8000 - - - Other No.
9027.90 - - Microtomes; parts and accessories:
9027.90.2000 - - - Microtomes No.
- - - Parts and accessories:
9027.90.5430 - - - - Of articles of Schedule B numbers 9027.30.4040 and 9027.30.4080 X
9027.90.5440 - - - - Of articles of Schedule B number 9027.50.1000 X
9027.90.8950 - - - - Other X
90.28 - Gas, liquid or electricity supply or production meters, including calibrating meters thereof; parts and accessories thereof:
9028.10.0000 - - Gas meters No.
9028.20.0000 - - Liquid meters No.
9028.30.0000 - - Electricity meters No.
9028.90 - - Parts and accessories:
9028.90.0040 - - - Of electricity meters X
9028.90.0080 - - - Other X
90.29 - Revolution counters, production counters, taximeters, odometers, pedometers and the like; speedometers and tachometers, other than those of heading 9014 or 9015; stroboscopes; parts and accessories thereof:
9029.10.0000 - - Revolution counters, production counters, taximeters, odometers, pedometers and the like X
9029.20 - - Speedometers and tachometers; stroboscopes:
- - - Speedometers and tachometers:
9029.20.4040 - - - - For use in civil aircraft No.
9029.20.5000 - - - - Other No.
9029.20.6000 - - - Stroboscopes No.
9029.90.0000 - - Parts and accessories X
90.30 - Oscilloscopes, spectrum analyzers 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 ioniz ing radiations; parts and accessories thereof:
9030.10.0000 - - Instruments and apparatus for measuring or detecting ionizing radiations No.
9030.20.1500 - - Oscilloscopes and oscillographs No.
- - Other instruments and apparatus, for measuring or checking voltage, current, resistance or power:
9030.31.0000 - - - Multimeters without a recording device No.
9030.32.0000 - - - Multimeters with a recording device No.
9030.33 - - - Other, without a recording device:
9030.33.0040 - - - - For measuring or checking voltage, current or resistance X
9030.33.0080 - - - - Other X
9030.39.0100 - - - Other, with a recording device X
9030.40.0000 - - Other instruments and apparatus, specially designed for telecommunications (for example, cross-talk meters, gain measuring instruments, distortion factor meters, psophometers) X
- - Other instruments and apparatus:
9030.82.0000 - - - For measuring or checking semiconductor wafers or devices No.
9030.84.0000 - - - Other, with a recording device X
9030.89.0100 - - - Other X
9030.90 - - Parts and accessories:
9030.90.4000 - - - For articles of subheading 9030.10 X
- - - Other:
9030.90.8010 - - - - Of articles of subheading 9030.20 X
9030.90.8020 - - - - Of articles of subheading 9030.31 X
9030.90.8030 - - - - Of articles of subheading 9030.39 X
9030.90.8040 - - - - Of articles of subheading 9030.40 X
9030.90.8050 - - - - Of articles of subheadings 9030.82 or 9030.84 X
9030.90.8060 - - - - Other X
90.31 - Measuring or checking instruments, appliances and machines, not specified or included elsewhere in this chapter; profile projectors; parts and accessories thereof:
9031.10.0000 - - Machines for balancing mechanical parts X
9031.20.0000 - - Test benches X
- - Other optical instruments and appliances:
9031.41.0000 - - - For inspecting semiconductor wafers or devices or for inspecting photomasks or reticles used in manufacturing semiconductor devices No.
9031.49 - - - Other:
9031.49.1000 - - - - Profile projectors X
9031.49.4000 - - - - Coordinate-measuring machines X
9031.49.8000 - - - - Other X
9031.80 - - Other instruments, appliances and machines:
- - - Equipment for testing the characteristics of internal combustion engines:
9031.80.8060 - - - - For testing electrical characteristics X
9031.80.8070 - - - - Other X
9031.80.8080 - - - Other X
9031.90.0000 - - Parts and accessories X
90.32 - Automatic regulating or controlling instruments and apparatus; parts and accessories thereof:
9032.10.0000 - - Thermostats No.
9032.20.0000 - - Manostats No.
- - Other instruments and apparatus:
9032.81 - - - Hydraulic or pneumatic:
9032.81.0040 - - - - Industrial process control instruments and apparatus No.
9032.81.0080 - - - - Other No.
9032.89 - - - Other:
9032.89.3000 - - - - Automatic voltage and voltage-current regulators X
- - - - Other:
9032.89.6020 - - - - - Control instruments for air-conditioning, refrigeration or heating systems X
- - - - - Process control instruments and apparatus:
9032.89.6030 - - - - - - Complete systems No.
- - - - - - Other:
9032.89.6040 - - - - - - - Temperature control instruments No.
9032.89.6050 - - - - - - - Pressure and draft control instruments No.
9032.89.6060 - - - - - - - Flow and liquid level control instruments No.
9032.89.6070 - - - - - - - Humidity control instruments No.
9032.89.6075 - - - - - - - Other X
9032.89.6085 - - - - - Other X
9032.90.0000 - - Parts and accessories X
9033.00.0000 - Parts and accessories (not specified or included elsewhere in this chapter) for machines, appliances, instruments or appliances of chapter 90 X

Source: U.S. Census Bureau | Foreign Trade | ftdwebm 7;ster@census.gov |  Last Revised: April 22, 2014