U.S. imports of Manostats (Automatic Pressure-Regulating Instruments) (HS 903220) totaled $7.6M in August 2026, imported from 38 countries.
Importers of Manostats (Automatic Pressure-Regulating Instruments) paid $243K in duties in August 2026, an average duty rate of 3.20% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Manostats (Automatic Pressure-Regulating Instruments) imports of $7.6M in August 2026 ran 17% above the year-to-date monthly average of $6.5M.
Last updated: August 2026 dataManostats are automatic pressure-sensing switches that maintain a set pressure level by opening or closing a circuit or valve — a narrower function than general pressure controllers, which is why they occupy their own dedicated heading rather than the broader 9032.89 NESOI category. The single 10-digit line 9032200000 covers all manostats without further subdivision. Mexico leads US imports, followed by Germany and France, reflecting European precision in fluid-control engineering and North American manufacturing integration. Importers should distinguish manostats from pressure-relief valves (heading 8481) and from multi-variable process controllers (9032.89) to avoid misclassification.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
629 import shipments a month
A manostat automatically regulates pressure by controlling an electrical circuit or a modulating valve to maintain a preset pressure level — it is a sensing-and-switching instrument classified in Chapter 90. A pressure-relief or safety valve (heading 8481) is a purely mechanical device that opens to release excess pressure without any electronic sensing or switching function. If a device combines both mechanical relief and electronic pressure-sensing control, classification depends on which function constitutes the essential character.
Generally no. Chapter 90 note provisions treat instruments and apparatus of heading 9032 as classifiable in that heading even when they are dedicated to a specific machine or system, unless they are integral parts of that machine and lose their identity as separate instruments. A manostat supplied separately — even if destined for installation in a pneumatic conveying line — retains its classification under 9032.20. If it is pre-installed and shipped as an integral assembly with the conveying equipment, the composite-goods rules would apply.
Subheading 4 of 5 in heading 9032
Subheading 903220 · $7.6M of $369.2M
ImportsExports
Imports
$7.6MYoY · free account
Exports
$6.6MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $78.7M of Manostats (Automatic Pressure-Regulating Instruments) and exported $76.0M.
Through August 2026. Source: U.S. Census Bureau.
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 |
|---|---|---|---|---|---|
| 9032200000 | Manostats | $7.6M | 3.20% | 28.30% | $243K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 9032200000 | Manostats | $6.6M |
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 · August 2026
origin
Mexico and Germany together supply 65% of it. Thailand pays 12.5% duty; Canada 0.0%.
customs district
destination
entry
rate provision · imports
68.4% enters free of duty; duty collected equals 3.20% of imports for consumption.
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