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SITCSection 8
U.S. imports of instruments & apparatus for measuring or checking variables of liquids or gases (nes) (SITC 87437) totaled $36.8M in April 2026, traded with 52 countries.
Importers of Instruments & Apparatus for Measuring or Checking Variables of Liquids or Gases (NES) paid $3.2M in duties in April 2026 — an effective duty rate of 12% on $27.4M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataCovering liquid and gas measurement instruments not captured by the more specific flow, level, or pressure headings, this residual category encompasses devices such as viscometers, density meters, and humidity analyzers used across food processing, pharmaceuticals, and petrochemical refining. The N.E.S. designation makes it a classification of last resort within the liquid/gas instrument family, so importers should systematically rule out headings 87431 and 87435 before applying 87437. Multi-parameter analyzers that measure several variables simultaneously often require a principal-function determination to land in the correct heading.
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Instruments measuring variables such as viscosity, density, turbidity, or humidity in liquid or gas streams—where no dedicated heading exists—are the primary candidates. Flow meters belong in 87431 and pressure gauges in 87435; 87437 captures everything else in the liquid/gas measurement family that is not elsewhere specified.
Classification of multi-function instruments generally follows the principal function. If flow measurement is the device's primary commercial purpose, 87431 is the likely heading; if viscosity or another variable dominates, 87437 may apply. A licensed customs broker or binding ruling request from CBP can provide certainty before large-volume shipments.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| MEXICO | $5.8M | $9.6M | +$3.8M |
| CANADA | $3.9M | $6.0M | +$2.0M |
| JAPAN | $4.7M | $5.2M | +$459K |
| GERMANY | $6.6M | $1.2M | -$5.4M |
| UNITED KINGDOM | $2.2M | $2.6M | +$345K |
Monthly import values over time