U.S. imports of Parts & Accessories for Liquid or Gas Measurement Instruments (NES) (SITC 87439) totaled $70.0M in August 2026, imported from 68 countries.
Importers of Parts & Accessories for Liquid or Gas Measurement Instruments (NES) paid $6.6M in duties in August 2026, an average duty rate of 9.70% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataReplacement sensors, housings, display modules, and other components destined for flow, level, pressure, and variable-measurement instruments are grouped here when they are not more specifically classified elsewhere. Traded separately from finished instruments, these parts support aftermarket maintenance and OEM assembly operations in industries ranging from water utilities to semiconductor fabs. Correct parts classification requires confirming that the component is dedicated to instruments within the 874 family rather than to general industrial machinery, as misclassification can affect both duty rates and export-control screening.
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6.1K import shipments a month
A component that is clearly designed and marketed as a spare or replacement for a measurement instrument, and that cannot function independently as a complete instrument, is generally classified as a part under 87439. If the sensor is self-contained and sold as a standalone measuring device, it may qualify as a finished instrument under the appropriate instrument heading.
Yes. Parts and accessories for measurement instruments sourced from certain origins may carry Section 301 exposure under the corresponding HTS subheadings. Importers should verify the applicable HTS code and country of origin for each part number, as duty treatment for components can differ from that of the finished instruments they support.
Basic heading 128 of 419 in section 8
Basic heading 87439 · $70.0M of $46.9B
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Imports · August 2026
origin
China pays 36.9% duty; Canada 0.8%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$70.0MYoY · free account
Exports
$67.7MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $747.8M of Parts & Accessories for Liquid or Gas Measurement Instruments (NES).
Through August 2026 · exports 11 of 12 months reported. Source: U.S. Census Bureau.