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NAICSSector 33
U.S. imports of industrial process control instruments (NAICS 334513) totaled $783.0M in July 2026, traded with 114 countries.
Importers of Industrial Process Control Instruments paid $61.4M in duties in July 2026 — an effective duty rate of 12% on $506.8M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataPressure transmitters, flow controllers, temperature sensors, and programmable logic controllers (PLCs) used in manufacturing, refining, and utilities fall within NAICS 334513, making this sector a foundational input for capital-intensive industries. Procurement teams in oil and gas, chemical processing, and food manufacturing rely on these instruments for continuous process monitoring, and supply disruptions — whether from tariff actions or semiconductor shortages — can halt production lines. A significant portion of imported process control instruments and subassemblies originate from countries subject to Section 301 tariffs, and classification precision matters because similar-looking instruments can fall under different HTS provisions depending on their measured variable (pressure, temperature, flow, or level).
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
45.9K shipments/mo
US customs classification of process instruments is highly sensitive to the primary variable being measured or controlled — pressure, temperature, flow, or level each maps to distinct HTS headings with potentially different duty rates and Section 301 exposure. Importers should obtain a product-specific classification ruling from CBP when a single instrument measures multiple variables, as the principal function determines the correct heading.
Standard commercial entry documents apply — commercial invoice, packing list, and bill of lading — but importers should also be prepared to provide technical specifications or a manufacturer's declaration if CBP questions classification. For PLCs with encryption or wireless capability, an FCC equipment authorization may be required before the product can be marketed in the US.
National industry 3 of 9 in naics industry 33451
National industry 334513 · $783.0M of $7.0B
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Imports · July 2026
origin
customs district
Census does not publish district detail for this classification system.
destination
None recorded for this period.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$783.0MYoY · Pro
Exports
$752.0MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.