HS code · 6-digit subheading
HS Code 9031.90 – Instruments, appliances and machines; parts and accessories for those measuring or checking devices of heading no. 9031
HS code 9031.90 is the 6-digit subheading for instruments, appliances and machines, parts and accessories for those measuring or checking devices of heading no. 9031. It is used for CMM probes, optical comparator screens, sensor modules for inspection systems, calibration blocks and test fixtures.
What HS 9031.90 covers
This category covers the essential parts and accessories for the measuring and checking instruments classified under heading 9031. These components are vital for the maintenance, repair, and enhancement of sophisticated industrial and laboratory equipment. Trade in these items is driven by the need to support the installed base of high-precision machinery, ensuring their longevity and operational accuracy. Importers are typically service providers, distributors, and end-users of the main instruments, often located in countries with significant manufacturing and research sectors. Exporters are usually the original equipment manufacturers (OEMs) or specialized component suppliers. Key considerations include compatibility, precision manufacturing, and often proprietary designs, making the supply chain critical for industrial continuity.
- Covers
- CMM probes
- Optical comparator screens
- Sensor modules for inspection systems
- Calibration blocks
- Test fixtures
- Software licenses for measurement devices
- Replacement laser heads
- Machine vision lenses
- Examples
- Renishaw SP25M Scanning Probe
- Mitutoyo Stylus for Surftest
- Keyence CA-H200C Camera Head
- Fluke i400 AC Current Clamp
Codes often confused with 9031.90
Common mistake. Misclassification can occur with parts for other specific instruments, such as those for material testing machines (902490) or analytical instruments (902790), if the connection to 9031 devices is not clearly established.
Top exporters and importers of HS code 903190, 2025
In 2025, the largest exporter of HS code 903190 in UN Comtrade data was Germany, with 13% of world exports; the largest importer in UN Comtrade data was China, with 17% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 Germany $1.5B 13% of world exports
- 2 United States $1.4B 12% of world exports
- 3 China $1.2B 10% of world exports
World total: $11.6B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 China $2.1B 17% of world imports
- 2 United States $1.3B 10% of world imports
- 3 Taiwan* ~$1.0B 8.1% of world imports · partner records ↗
World total: $12.6B Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. UN Comtrade records Taiwan as "Other Asia, not elsewhere specified". Saudi Arabia's exports under that code are left out: they are far too large to be trade with Taiwan, so mostly undisclosed partners. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM codes for 9031.90 2
Brazil splits HS 9031.90 into 2 NCM codes, Mercosur's 8-digit tariff lines.
- 9031.90.10 Parts and accessories of test benchesDe bancos de ensaio
- 9031.90.90 Other parts and accessories, measuring instrumentsOutros
All Brazil NCM codes in heading 90.31 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 9031.90
What is HS code 903190?
HS code 903190 is a 6-digit subheading in the Harmonized System that covers: Instruments, appliances and machines; parts and accessories for those measuring or checking devices of heading no. 9031. This category covers the essential parts and accessories for the measuring and checking instruments classified under heading 9031. These components are vital for the maintenance, repair, and enhancement of sophisticated industrial and laboratory equipment. Trade in these items is driven by the need to support the installed base of high-precision machinery, ensuring their longevity and operational accuracy. Importers are typically service providers, distributors, and end-users of the main instruments, often located in countries with significant manufacturing and research sectors. Exporters are usually the original equipment manufacturers (OEMs) or specialized component suppliers. Key considerations include compatibility, precision manufacturing, and often proprietary designs, making the supply chain critical for industrial continuity.
What products fall under HS code 903190?
CMM probes, optical comparator screens, sensor modules for inspection systems, calibration blocks, test fixtures, software licenses for measurement devices, replacement laser heads, machine vision lenses
What are common misclassifications for HS code 903190?
Misclassification can occur with parts for other specific instruments, such as those for material testing machines (902490) or analytical instruments (902790), if the connection to 9031 devices is not clearly established.
Which countries are the top exporters of goods under HS code 903190?
In 2025, the top exporters of HS code 903190 in UN Comtrade data were Germany ($1.5B, 13% of world exports), the United States ($1.4B) and China ($1.2B). World exports came to about $11.6B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of goods under HS code 903190?
In 2025, the top importers of HS code 903190 in UN Comtrade data were China ($2.1B, 17% of world imports), the United States ($1.3B) and Taiwan (about $1.0B). World imports came to about $12.6B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
How is HS code 903190 structured?
HS code 903190 is a 6-digit subheading under the Harmonized System. The first 2 digits (90) identify the chapter, digits 3-4 (31) identify the heading, and digits 5-6 (90) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 903190?
Brazil splits HS code 903190 into 2 NCM codes: 9031.90.10 (Parts and accessories of test benches), 9031.90.90 (Other parts and accessories, measuring instruments). The first 6 digits of each match the HS code.