Product classification
HS code for Hygrometer elements: 9025.90
Hydrometers and similar floating instruments, barometers, hygrometers, psychrometers, thermometers, pyrometers, recording or not, any combination of these instruments, parts and accessories.
Classification of hygrometer elements under HS 9025.90
Hygrometer elements are classified under HS code 9025.90, which is the designated category for parts and accessories of the instruments described in heading 9025. This heading includes hydrometers, barometers, hygrometers, and psychrometers. According to Note 2 to Chapter 90, parts and accessories for machines or instruments of this chapter are to be classified according to specific rules. If the part itself constitutes an instrument covered by another heading, it is classified there; however, specialized components like sensing elements for hygrometers that do not have a more specific heading are classified under 9025.90. These elements are critical for the detection of humidity levels in the atmosphere or within specific industrial processes. They may include hair elements, synthetic fiber elements, or specialized membranes that react to moisture. The classification under 9025.90 ensures that components intended solely for the repair or assembly of hygrometers are grouped with the parent instrument category. This facilitates accurate duty assessment and statistical tracking of the trade in meteorological and environmental monitoring components. It is important to note that for an item to be classified here, it must be identifiable as being suitable for use solely or principally with the instruments of heading 9025.
- Covers
- Humidity sensing membranes
- Hygrometer dials and scales
- Protective housings for hygrometer sensors
- Psychrometer wick assemblies
- Bimetallic strips specifically for hygrometers
- Also under 9025.90
- 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. Hygrometer elements are frequently misclassified under 9025.80, which is the code for the complete, finished instrument. Another common error involves electronic humidity sensors; if the sensor is a variable resistor (hygristor), it might be classified under 8533. If it is a complete electronic module for measuring humidity, it may fall under 9027.80 or 9031.80 depending on its design and application.
Top exporters and importers of HS 902590 (the code used for hygrometer elements), 2025
In 2025, the largest exporter of HS 902590 (the code used for hygrometer elements) 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.
Figures cover everything classified under HS 902590, not only hygrometer elements.
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 hygrometer elements
Brazil splits HS 9025.90 into 2 NCM codes. Pick the one that matches your product:
- 9025.90.10Parts and accessories of thermometers
- 9025.90.90Parts and accessories of hydrometers and similar
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about hygrometer elements
What is the HS code for Hygrometer elements?
The HS code for Hygrometer elements is 902590 (Hydrometers and similar floating instruments, barometers, hygrometers, psychrometers, thermometers, pyrometers; recording or not, any combination of these instruments, parts and accessories). The HS code for parts and accessories of hygrometers, including elements, is 9025.90.
How do I classify Hygrometer elements for customs?
Hygrometer elements is classified under HS code 902590 — Hydrometers and similar floating instruments, barometers, hygrometers, psychrometers, thermometers, pyrometers; recording or not, any combination of these instruments, parts and accessories. This is a 6-digit subheading level code.
Can complete hygrometers be classified under 9025.90?
No, complete hygrometers must be classified under 9025.80. The 9025.90 code is strictly for parts and accessories.
Which countries are the top exporters of hygrometer elements (HS 902590)?
In 2025, the top exporters of HS 902590 (the code used for hygrometer elements) 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 hygrometer elements (HS 902590)?
In 2025, the top importers of HS 902590 (the code used for hygrometer elements) 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.
Is the HS code for Hygrometer elements the same in all countries?
The base HS code 902590 for Hygrometer elements 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 hygrometer elements in Brazil?
Brazil splits HS 902590 into 2 NCM codes, so the right one for hygrometer elements depends on the product's details: 9025.90.10 (Parts and accessories of thermometers), 9025.90.90 (Parts and accessories of hydrometers and similar).