Standard International Trade Classification
U.S. exports of Parts & Accessories for Electrical Measuring Instruments and Ionizing Radiation Detectors (SITC 87479) totaled $171.8M in August 2026.
Importers of Parts & Accessories for Electrical Measuring Instruments and Ionizing Radiation Detectors paid $8.8M in duties in August 2026, an average duty rate of 9.01% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataReplacement and upgrade components for electrical quantity measuring instruments and ionizing radiation detection apparatus — probe assemblies, shunt resistors, detector modules, and calibration accessories — are consolidated under SITC 87479, excluding parts for meters classified elsewhere. The aftermarket and MRO (maintenance, repair, and overhaul) character of this trade flow means shipments are often smaller in volume but higher in unit value and technical specificity. Correct classification requires confirming that the part is dedicated to an instrument in the 874 group rather than to a meter or apparatus classified in a different SITC division.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
6.1K import shipments a month
The key test is the principal instrument the part is designed for. Parts dedicated to electrical quantity measuring instruments (excluding meters) and ionizing radiation detectors belong in 87479. Parts for meters, process control instruments, or optical measuring equipment are classified under their respective parts headings. When a part is multi-use, classification typically follows the instrument representing the primary application.
Parts and accessories sourced from China in this category may be subject to Section 301 tariff measures, and the applicable list and rate can differ from those governing the finished instruments. Importers should verify the specific HTS 10-digit classification for each part number, as parts and finished goods within the same SITC heading do not always share the same Section 301 treatment.
Basic heading 20 of 419 in section 8
Basic heading 87479 · $171.8M of $18.4B
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Exports · August 2026
destination
Taiwan and Malaysia together take 50% of it.
customs district
Census does not publish district detail for this classification system.
origin
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$96.9MYoY · free account
Exports
$171.8MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $1.2B of Parts & Accessories for Electrical Measuring Instruments and Ionizing Radiation Detectors.
Through August 2026 · exports 11 of 12 months reported. Source: U.S. Census Bureau.