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SITCSection 8
U.S. exports of parts & accessories for electrical measuring instruments and ionizing radiation detectors (SITC 87479) totaled $132.1M in July 2026.
Importers of Parts & Accessories for Electrical Measuring Instruments and Ionizing Radiation Detectors paid $11.0M in duties in July 2026 — an effective duty rate of 12% on $90.7M in dutiable value, based on actual customs collections rather than the published tariff schedule. Parts & Accessories for Electrical Measuring Instruments and Ionizing Radiation Detectors imports of $109.7M in July 2026 ran 11% above the year-to-date monthly average of $99.0M.
Basic heading 84 of 419 in section 8
Basic heading 87479 · $109.7M of $44.8B
Replacement 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.
6.2K shipments/mo
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.
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Exports · July 2026
destination
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
$109.7MYoY · Pro
Exports
$132.1MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.