HS code · 6-digit subheading
HS Code 9025.90 – Hydrometers and similar floating instruments, barometers, hygrometers, psychrometers, thermometers, pyrometers; recording or not, any combination of these instruments, parts and accessories
HS code 9025.90 is the 6-digit subheading for hydrometers and similar floating instruments, barometers, hygrometers, psychrometers, thermometers, pyrometers, recording or not, any combination of these instruments, parts and accessories. It is used for temperature probes, humidity sensors, barometer capsules, hydrometer weights and display units for weather stations.
What HS 9025.90 covers
This HS code is dedicated to the essential parts and accessories that support the functionality, maintenance, and calibration of the diverse range of instruments classified under 9025. This includes components for hydrometers, barometers, hygrometers, psychrometers, and various types of thermometers and pyrometers, especially those with recording or combined functions. Importers are typically service centers, industrial users, and distributors who need to repair, upgrade, or customize their existing equipment. Exporters are often the original instrument manufacturers or specialized component suppliers. The trade in these parts ensures the longevity, accuracy, and adaptability of critical environmental and process monitoring tools worldwide, supporting continuous operation and extending the lifespan of valuable instrumentation.
- Covers
- Temperature probes
- Humidity sensors
- Barometer capsules
- Hydrometer weights
- Display units for weather stations
- Calibration solutions for density meters
- Replacement thermistors
- Data logging modules
- Examples
- Davis Instruments Anemometer Replacement
- Extech RH300-P Temperature/Humidity Probe
- Kestrel Replacement Impeller
- Omega Engineering Thermocouple Probes
- Vaisala HMP155 Humidity and Temperature Probe
Codes often confused with 9025.90
Common mistake. Can be confused with general electronic components under Section XVI or parts of other measuring instruments under 903190 if their specific use for 9025 instruments is not clear.
Top exporters and importers of HS code 902590, 2025
In 2025, the largest exporter of HS code 902590 in UN Comtrade data was Germany, with 11% of world exports; the largest importer in UN Comtrade data was China, with 11% 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 $198M 11% of world exports
- 2 China $182M 10% of world exports
- 3 Japan $170M 9.4% of world exports
World total: $1.8B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 China $192M 11% of world imports
- 2 Japan $116M 6.8% of world imports
- 3 United States $111M 6.5% of world imports
World total: $1.7B 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 codes for 9025.90 2
Brazil splits HS 9025.90 into 2 NCM codes, Mercosur's 8-digit tariff lines.
- 9025.90.10 Parts and accessories of thermometersDe termômetros
- 9025.90.90 Parts and accessories of hydrometers and similarOutros
All Brazil NCM codes in heading 90.25 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 9025.90
What is HS code 902590?
HS code 902590 is a 6-digit subheading in the Harmonized System that covers: Hydrometers and similar floating instruments, barometers, hygrometers, psychrometers, thermometers, pyrometers; recording or not, any combination of these instruments, parts and accessories. This HS code is dedicated to the essential parts and accessories that support the functionality, maintenance, and calibration of the diverse range of instruments classified under 9025. This includes components for hydrometers, barometers, hygrometers, psychrometers, and various types of thermometers and pyrometers, especially those with recording or combined functions. Importers are typically service centers, industrial users, and distributors who need to repair, upgrade, or customize their existing equipment. Exporters are often the original instrument manufacturers or specialized component suppliers. The trade in these parts ensures the longevity, accuracy, and adaptability of critical environmental and process monitoring tools worldwide, supporting continuous operation and extending the lifespan of valuable instrumentation.
What products fall under HS code 902590?
Temperature probes, humidity sensors, barometer capsules, hydrometer weights, display units for weather stations, calibration solutions for density meters, replacement thermistors, data logging modules
What are common misclassifications for HS code 902590?
Can be confused with general electronic components under Section XVI or parts of other measuring instruments under 903190 if their specific use for 9025 instruments is not clear.
Which countries are the top exporters of goods under HS code 902590?
In 2025, the top exporters of HS code 902590 in UN Comtrade data were Germany ($198M, 11% of world exports), China ($182M) and Japan ($170M). World exports came to about $1.8B, 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 902590?
In 2025, the top importers of HS code 902590 in UN Comtrade data were China ($192M, 11% of world imports), Japan ($116M) and the United States ($111M). World imports came to about $1.7B, 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 902590 structured?
HS code 902590 is a 6-digit subheading under the Harmonized System. The first 2 digits (90) identify the chapter, digits 3-4 (25) 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 902590?
Brazil splits HS code 902590 into 2 NCM codes: 9025.90.10 (Parts and accessories of thermometers), 9025.90.90 (Parts and accessories of hydrometers and similar). The first 6 digits of each match the HS code.