Harmonized System
U.S. imports of Constant-Weight Scales and Hopper Scales for Predetermined-Weight Discharge (HS 842330) totaled $8.1M in September 2026, imported from 24 countries.
Importers of Constant-Weight Scales and Hopper Scales for Predetermined-Weight Discharge paid $1.0M in duties in September 2026, an average duty rate of 11.84% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Constant-Weight Scales and Hopper Scales for Predetermined-Weight Discharge imports of $8.1M in September 2026 ran 12% below the year-to-date monthly average of $9.2M.
Last updated: September 2026 dataHopper scales, net-weight fillers, and constant-weight batching systems used to discharge a preset quantity of bulk material into bags or containers are classified here — equipment central to grain milling, chemical blending, pet food, and fertilizer packaging operations. Japan leads US supply for this heading, followed by Germany and Denmark, reflecting the precision-engineering requirements of high-speed net-weight filling in food and agricultural applications. A single 10-digit line, 8423300000, covers the entire heading, so classification is unambiguous, but importers should verify whether the equipment's integrated control system affects valuation or requires separate software disclosure.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
134 import shipments a month
A hopper scale (8423.30) is designed to discharge a predetermined weight of material into a container — it controls the fill quantity. A checkweigher, by contrast, verifies the weight of already-filled packages passing on a conveyor and would typically classify under 8423.81 or 8423.82 depending on its maximum capacity. Misclassifying a net-weight filler as a checkweigher, or vice versa, can result in an incorrect duty rate and potential CBP penalties. The machine's operational sequence — whether it measures to fill or measures to verify — is the key classification criterion.
No antidumping, countervailing duty, or Section 232 measure currently targets hopper or constant-weight scales from Japan as a category. Importers should nonetheless run a current AD/CVD search against HTS 8423300000 at the time of entry, as trade-remedy orders can be initiated or modified. Japan is not a US free-trade-agreement partner, so standard MFN duty rates apply.
Subheading 3 of 7 in heading 8423
Subheading 842330 · $8.1M of $76.1M
ImportsExports
Imports
$8.1MYoY · free account
Exports
$4.6MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to September 2026, the U.S. imported $107.6M of Constant-Weight Scales and Hopper Scales for Predetermined-Weight Discharge and exported $33.0M.
Through September 2026. Source: U.S. Census Bureau.
Trade Directory
List your company under HS 842330 — Constant-Weight Scales and Hopper Scales for Predetermined-Weight Discharge, so the companies trading it can find you. Be the first supplier listed.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8423300000 | Const-Wght Scales & Dischrging Predet Wghts in Bag | $10.7M | 9.83% | 72.17% | $1.1M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8423300000 | Const-Wght Scales & Dischrging Predet Wghts in Bag | $3.7M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · September 2026
origin
Japan and Canada together supply 59% of it. China pays 37.2% duty; Canada 0.0%.
customs district
destination
entry
rate provision · imports
15.3% enters free of duty; duty collected equals 11.84% of imports for consumption.