North American Industry Classification System
U.S. imports of Industrial Process Control Instruments (NAICS 334513) totaled $755.8M in August 2026, imported from 117 countries.
Importers of Industrial Process Control Instruments paid $61.3M in duties in August 2026, an average duty rate of 8.22% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 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.
45.8K import shipments a month
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 · $755.8M of $6.6B
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Imports · August 2026
origin
China pays 28.1% duty; Mexico 1.4%.
customs district
Census does not publish district detail for this classification system.
destination
Census publishes state breakdowns for NAICS to the 4-digit level only. See NAICS 3345 for those.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$755.8MYoY · free account
Exports
$749.5MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $8.6B of Industrial Process Control Instruments and exported $8.4B.
Through August 2026. Source: U.S. Census Bureau.