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HSChapter 90
U.S. imports of parts & accessories for physical & chemical analysis instruments (HS 902790) totaled $203.4M in June 2026, traded with 73 countries.
Importers of Parts & Accessories for Physical & Chemical Analysis Instruments paid $20.2M in duties in June 2026 — an effective duty rate of 12% on $171.3M in dutiable value, based on actual customs collections rather than the published tariff schedule. Parts & Accessories for Physical & Chemical Analysis Instruments imports of $203.4M in June 2026 ran 12% above the year-to-date monthly average of $182.3M.
Last updated: June 2026 dataThe parts and accessories heading for Chapter 9027 analytical instruments is one of the most structurally complex in the HTS, with seventeen 10-digit subheadings that cross-reference specific parent instrument subheadings — including dedicated lines for parts of chromatographs, spectrometers, electrophoresis instruments, and microtomes. Japan and Germany lead US import supply, with Mexico, Singapore, and China also significant. Microtomes (9027902000), used in histology and materials science to prepare thin sections for microscopy, are separately enumerated here rather than with the analytical instruments themselves. Correct classification of a part requires first identifying the parent instrument's subheading, then locating the corresponding parts line — a two-step process that is a frequent source of entry errors.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Microtomes are specifically enumerated in heading 9027.90 by the HTS schedule, placing them alongside parts and accessories for analytical instruments rather than as standalone instruments. This reflects the HS nomenclature structure, where microtomes have historically been grouped with laboratory preparation equipment ancillary to analysis. Importers should use subheading 9027902000 for microtomes and not attempt to classify them under a finished-instrument heading.
A detector cell identifiable as solely or principally used in a liquid chromatograph of heading 9027.20 should classify under the corresponding parts line for chromatograph accessories — specifically 9027905625 (parts and accessories of articles of 9027.20.50) or the applicable non-electrical parts line, depending on the parent instrument's electrical classification. The importer should document the dedicated use with the manufacturer's part number cross-reference to the parent instrument model.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 9027905650 | PARTS AND ACCESSOR OF ARTICLES OF 9027.50.40 NESOI | $53.3M | 11.42% | 85.13% | $6.1M |
| 9027905695 | PTS OF ELEC INST OF 9027.20,.30,.40,.50,.80 NESOI | $36.8M | 9.37% | 85.80% | $3.4M |
| 9027905910 | PARTS AND ACCESS OF ELEC INSTR OF 9027.10.20 NESOI | $29.1M | 8.75% | 82.82% | $2.5M |
| 9027905625 | PARTS AND ACCESSOR OF ARTICLES OF 9027.20.50 NESOI | $23.7M | 10.58% | 97.49% | $2.5M |
| 9027908800 | PTS & ACCES,NON-ELEC,EXCEPT OPTICAL INSTRU,NESOI | $15.2M | 10.01% | 89.60% | $1.5M |
| 9027905995 | PARTS OF ELEC INSTRUM PHYS/CHEM ANALYSIS ETC NESOI | $12.4M | 3.20% | 28.40% | $397K |
| 9027905630 | PARTS AND ACCESSOR OF ARTICLES OF 9027.30.40 NESOI | $8.3M | 12.43% | 95.69% | $1.0M |
| 9027908400 | PARTS OF NON-ELEC INSTRUM 9027.20,30,50,80 NESOI | $6.6M | 9.76% | 89.77% | $646K |
| 9027906400 | PTS NON ELEC OPTIC INST 0F 9027.20,.30,.40,.50,.80 | $6.1M | 8.78% | 84.53% | $534K |
| 9027902000 | MICROTOMES, NESOI | $4.1M | 11.04% | 97.65% | $453K |
| 9027905400 | PART OF ELECTROPHOR INST NT INC OPTIC/MEAS DEV NES | $3.2M | 8.62% | 79.71% | $276K |
| 9027904500 | PRINTED CIRCUIT ASSEMBL FOR GOODS OF 9027.80 NESOI | $3.1M | 12.56% | 95.47% | $384K |
| 9027906800 | PTS/ACCES NON ELEC,OPTICAL INST,PHYS/CHEM, NESOI | $1.6M | 20.55% | 96.87% | $329K |
| 9027905640 | PARTS AND ACCESSOR OF ARTICLES OF 9027.50.10 NESOI | $98K | 12.00% | 100.00% | $12K |
PARTS AND ACCESSOR OF ARTICLES OF 9027.50.40 NESOI
PTS OF ELEC INST OF 9027.20,.30,.40,.50,.80 NESOI
PARTS AND ACCESS OF ELEC INSTR OF 9027.10.20 NESOI
PARTS AND ACCESSOR OF ARTICLES OF 9027.20.50 NESOI
PTS & ACCES,NON-ELEC,EXCEPT OPTICAL INSTRU,NESOI
PARTS OF ELEC INSTRUM PHYS/CHEM ANALYSIS ETC NESOI
PARTS AND ACCESSOR OF ARTICLES OF 9027.30.40 NESOI
PARTS OF NON-ELEC INSTRUM 9027.20,30,50,80 NESOI
PTS NON ELEC OPTIC INST 0F 9027.20,.30,.40,.50,.80
MICROTOMES, NESOI
PART OF ELECTROPHOR INST NT INC OPTIC/MEAS DEV NES
PRINTED CIRCUIT ASSEMBL FOR GOODS OF 9027.80 NESOI
PTS/ACCES NON ELEC,OPTICAL INST,PHYS/CHEM, NESOI
PARTS AND ACCESSOR OF ARTICLES OF 9027.50.10 NESOI
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 9027908950 | PTS & ACCESS OF INST & APPTS FOR PHYSICAL/CHEM ETC | $191.4M |
| 9027905430 | PTS & ACCESS OF ARTICLES OF SUBHDG 9027.30.40 | $11.3M |
| 9027902000 | MICROTOMES, NESOI | $4.0M |
| 9027905440 | PTS & ACCESS OF ARTICLES OF SUBHDG 9027.50.1000 | $959K |
PTS & ACCESS OF INST & APPTS FOR PHYSICAL/CHEM ETC
1.3M kg
PTS & ACCESS OF ARTICLES OF SUBHDG 9027.30.40
120.2K kg
MICROTOMES, NESOI
3.7K no
PTS & ACCESS OF ARTICLES OF SUBHDG 9027.50.1000
34.8K kg
INSTR & APPL F MEDICAL SURGICAL DENTAL VET, NESOI
HS 901890
MED NEEDLES. NESOI, CATHERERS ETC AND PARTS ETC
HS 901839
ELECTRO-DIAGNOSTIC APPARATUS NESOI, AND PARTS ETC.
HS 901819
OZONE,OXYGEN,ETC THERAPY, RESPIRATION APPARATUS,PT
HS 901920
ARTIFICIAL JOINTS & PARTS & ACCESSORIES THEROF,NES
HS 902139
MEAS CHECKNG INSTRUMENT & MACH, NOT OPTICAL, NESOI
HS 903180
| State | Imports | Exports | Balance |
|---|---|---|---|
| California | $31.5M | $48.5M | +$17.0M |
| Massachusetts | $16.4M | $32.8M | +$16.4M |
| Texas | $17.9M | $15.5M | -$2.4M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEW ORLEANS, LA | $24.0M | $35.6M | +$11.6M |
| JFK INTERNATIONAL AIRPORT, NY | $12.5M | $24.7M | +$12.2M |
| CHICAGO, IL | $15.5M | $19.5M | +$4.0M |