Product classification
HS code for Extensometers: 9024.90
Machines and appliances, parts and accessories for those testing hardness, strength, compressibility, elasticity or other mechanical properties of materials (e.g. metal, wood, textiles, paper, plastics).
Classification of extensometers under HS 9024.90
Extensometers are precision instruments designed to measure the change in length of a specimen subjected to tension or compression. Under the Harmonized System, these devices are classified under HS code 9024.90. This classification is appropriate because extensometers are considered essential accessories for machines and appliances used for testing the mechanical properties of materials, such as metals, plastics, or textiles. Heading 9024 covers machines for testing hardness, strength, and elasticity, and the sub-heading 9024.90 specifically captures the parts and accessories that enable these machines to function or provide accurate data. Since an extensometer is typically used in conjunction with a Universal Testing Machine (UTM) to provide strain data, it is categorized as an accessory rather than a standalone measuring instrument of heading 9031.
- Covers
- Contact extensometers (clip-on types)
- Non-contact laser extensometers
- Video extensometers for high-strain applications
- Digital strain gauges used as testing accessories
- High-temperature extensometers for furnace testing
- Deflectometers used in flexural testing
- Also under 9024.90
- Instron 2580 Series Load Cells
- ZwickRoell makroXtens Extensometer
- MTS FlexTest Controllers
- Shimadzu Trapezoid Grips
- Buehler Wilson Rockwell Indenters
Codes often confused with 9024.90
Common mistake. Extensometers are frequently misclassified under HS code 9031.80, which covers other measuring or checking instruments. While they do measure length changes, their specific use as an accessory for material testing machines dictates classification in 9024.90. Another common error is using HS code 9017.30, which is reserved for micrometers, calipers, and gauges; however, these are manual hand tools and do not possess the integrated testing functionality of an extensometer.
Top exporters and importers of HS 902490 (the code used for extensometers), 2025
In 2025, the largest exporter of HS 902490 (the code used for extensometers) in UN Comtrade data was the United States, with 30% of world exports; the largest importer in UN Comtrade data was the United States, with 14% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 902490, not only extensometers.
Top exporters 2025 · share of world exports
- 1 United States $173M 30% of world exports
- 2 Germany $68M 12% of world exports
- 3 United Kingdom $68M 12% of world exports
World total: $584M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $72M 14% of world imports
- 2 Germany $40M 7.8% of world imports
- 3 United Kingdom $29M 5.7% of world imports
World total: $517M 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 that did not report are estimated from what other countries recorded trading with them. 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. 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 code for extensometers
Brazil classifies extensometers under NCM 9024.90.00: HS 9024.90 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about extensometers
What is the HS code for Extensometers?
The HS code for Extensometers is 902490 (Machines and appliances; parts and accessories for those testing hardness, strength, compressibility, elasticity or other mechanical properties of materials (e.g. metal, wood, textiles, paper, plastics)). The HS code for extensometers, when used as accessories for material testing equipment, is 9024.90.
How do I classify Extensometers for customs?
Extensometers is classified under HS code 902490 — Machines and appliances; parts and accessories for those testing hardness, strength, compressibility, elasticity or other mechanical properties of materials (e.g. metal, wood, textiles, paper, plastics). This is a 6-digit subheading level code.
Can an extensometer be classified under 9031?
Generally, no. If the device is specifically designed to work with a material testing machine to determine mechanical properties, 9024.90 is the correct code according to General Interpretative Rule 3(a) regarding specificity.
Which countries are the top exporters of extensometers (HS 902490)?
In 2025, the top exporters of HS 902490 (the code used for extensometers) in UN Comtrade data were the United States ($173M, 30% of world exports), Germany ($68M) and the United Kingdom ($68M). World exports came to about $584M, 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 extensometers (HS 902490)?
In 2025, the top importers of HS 902490 (the code used for extensometers) in UN Comtrade data were the United States ($72M, 14% of world imports), Germany ($40M) and the United Kingdom ($29M). World imports came to about $517M, 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.
Is the HS code for Extensometers the same in all countries?
The base HS code 902490 for Extensometers is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for extensometers in Brazil?
In Brazil, extensometers (HS 902490) is classified under NCM 9024.90.00.