NAICS 334519

Overview

Federal statistical programs classify establishments using the North American Industry Classification System (NAICS), a production-oriented taxonomy created under the Office of Management and Budget in 1997 to replace the SIC system. NAICS is maintained jointly by the U.S., Canada, and Mexico to enable comparable business statistics across North America; the current vintage is 2022. ⁴
U.S. industry 334519 covers the manufacture of measuring and controlling devices not otherwise classified in related instrument categories. It excludes search/detection and navigation instruments, automatic environmental controls, industrial process-variable instruments, totalizing fluid meters and counting devices, electrical signal test instruments, analytical laboratory instruments, watches/clocks, irradiation equipment, and electromedical/electrotherapeutic apparatus. Illustrative products include aircraft engine instruments, automotive emissions testing equipment, meteorological instruments, and physical-properties testing/inspection equipment. ¹

See also on G2X:

• G2X — NAICS 334513
• G2X — NAICS 334512

What this NAICS covers

• Manufacture of aircraft engine instruments (e.g., engine instruments used on aircraft). ¹
• Manufacture of automotive emissions testing equipment. ¹
• Manufacture of meteorological instruments (e.g., barometers, anemometers not elsewhere classified). ¹
• Manufacture of physical-properties testing and inspection equipment (e.g., hardness, tensile, materials test apparatus). ¹
• Manufacture of nonmedical glass thermometers and hydrometers classified to this industry via cross-references. ¹
• Manufacture of other measuring and controlling devices that do not fit the adjacent instrument industries listed in the exclusions. ¹

Related NAICS and PSC codes

Adjacent‑code boundaries (common misclassifications)

• Environmental and appliance control equipment falls under 334512, not 334519. ¹
• Instruments for measuring, displaying, or controlling industrial process variables belong to 334513. ¹
• Totalizing (registering) fluid meters and counting devices, including motor‑vehicle gauges, are classified in 334514. ¹
• Instruments for measuring and testing electricity and electrical signals are classified in 334515. ¹
• Analytical laboratory instruments are classified in 334516; search/detection and navigation systems in 334511. ¹

Frequently asked questions

• What does NAICS 334519 include?
  It encompasses manufacturing of measuring and controlling devices not elsewhere classified in the 33451 instrument family, such as aircraft engine instruments, automotive emissions testing equipment, meteorological instruments, and physical‑properties testing and inspection equipment. ¹

• Is NAICS 334519 recognized in the 2022 NAICS rollout?
  Yes. Census began publishing detailed statistics on the 2022 NAICS basis with the 2022 Economic Census and plans full program adoption by the end of 2027. ²

• How does 334519 differ from 334513 and 334512?
  334519 is a residual category for other measuring/controlling devices; industrial process‑variable instruments map to 334513, while residential/commercial/appliance automatic controls map to 334512. ¹

• Are medical thermometers in 334519?
  No. Medical thermometers are classified in 339112. Nonmedical glass thermometers and hydrometers are cross‑referenced into 334519. ¹

• Does 334519 cover software or calibration services?
  NAICS defines industries by primary production processes, and 334519 covers manufacturing activities. Not specified by official sources ¹.

Useful resources

• G2X — NAICS 334519
• U.S. Census — NAICS 334519 description and cross‑references. ¹
• U.S. Census — Implementation of the 2022 NAICS (scope, timing, change files). ²
• U.S. Census — 2022 NAICS Sector 31–33 Manufacturing data pages. ³
• U.S. Census — Economic Census guidance: NAICS structure and definitions. ⁴

References

1. U.S. Census Bureau — NAICS 2022: 334519 Instrument Manufacturing for Measuring and Controlling Devices, Not Elsewhere Classified (official description and cross‑references). https://www.census.gov/naics/?input=334519&year=2022&details=334519
2. U.S. Census Bureau — The Census Bureau’s Implementation of the 2022 NAICS. https://www.census.gov/library/reference/code-lists/naics/2022/implementation-timeline.html
3. U.S. Census Bureau — 2022 NAICS Sector 31–33 Manufacturing (Economic Census data). https://www.census.gov/data/tables/2022/econ/economic-census/naics-sector-31-33.html
4. U.S. Census Bureau — Economic Census: NAICS Codes & Understanding Industry Classification Systems. https://www.census.gov/programs-surveys/economic-census/year/2022/technical-documentation/code-lists/understanding-naics-redirect.html