Product classification
HS code for Thermostats: 9032.10
Regulating or controlling instruments and apparatus, automatic type, thermostats.
Classification of thermostats under HS 9032.10
Thermostats are classified under HS code 9032.10, which falls within Chapter 90 of the Harmonized System. This chapter covers optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus. Specifically, heading 9032 is reserved for automatic regulating or controlling instruments and apparatus. A thermostat is defined as an instrument that automatically controls temperature by switching a heating or cooling system on or off, or by regulating the flow of a heat-transfer fluid. The classification is determined by General Interpretative Rule (GRI) 1, which dictates that classification is determined according to the terms of the headings and any relative section or chapter notes. Since 9032.10 specifically names thermostats, it is the primary classification for these devices regardless of whether they are electronic, electrical, or mechanical. These devices function by comparing a measured temperature to a desired set point and initiating a corrective action, which is the hallmark of the instruments described in this heading. The classification remains consistent whether the device is used in domestic appliances, industrial machinery, or HVAC systems, provided the primary function is the automatic regulation of temperature.
- Covers
- Digital programmable thermostats
- Bimetallic strip thermostats
- Smart Wi-Fi enabled thermostats
- Capillary tube thermostats for refrigeration
- Electronic temperature controllers with relay outputs
- Also under 9032.10
- Nest Learning Thermostat
- Honeywell T6 Pro Smart Thermostat
- Siemens RDD100 Room Thermostat
- Danfoss RT Series Thermostat
Codes often confused with 9032.10
Common mistake. Thermostats are frequently misclassified under HS code 9025.11 or 9025.19, which cover thermometers and pyrometers. The distinction lies in the function: 9025 is for instruments that only measure temperature, whereas 9032 is for instruments that control it. Another common error is using HS code 8536.50 for simple thermal switches. While a thermal switch may look like a thermostat, if it lacks a mechanism for continuous regulation or adjustment of a set point, it may be viewed as a simple switch.
Top exporters and importers of HS 903210 (the code used for thermostats), 2025
In 2025, the largest exporter of HS 903210 (the code used for thermostats) in UN Comtrade data was China, with 16% of world exports; the largest importer in UN Comtrade data was the United States, with 23% 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 903210, not only thermostats.
Top exporters 2025 · share of world exports
- 1 China $762M 16% of world exports
- 2 Germany $621M 13% of world exports
- 3 Mexico $584M 12% of world exports
World total: $4.7B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $1.1B 23% of world imports
- 2 Germany $445M 9.5% of world imports
- 3 China $237M 5.1% of world imports
World total: $4.7B 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 thermostats
Brazil splits HS 9032.10 into 2 NCM codes. Pick the one that matches your product:
- 9032.10.10Fluid-expansion thermostats
- 9032.10.90Other thermostats
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about thermostats
What is the HS code for Thermostats?
The HS code for Thermostats is 903210 (Regulating or controlling instruments and apparatus; automatic type, thermostats). The HS code for thermostats is 9032.10, which covers automatic regulating or controlling instruments of the thermostat type.
How do I classify Thermostats for customs?
Thermostats is classified under HS code 903210 — Regulating or controlling instruments and apparatus; automatic type, thermostats. This is a 6-digit subheading level code.
Does this code include industrial temperature controllers?
Yes, industrial temperature controllers that automatically maintain a temperature by controlling a heating or cooling element are classified under 9032.10.
Which countries are the top exporters of thermostats (HS 903210)?
In 2025, the top exporters of HS 903210 (the code used for thermostats) in UN Comtrade data were China ($762M, 16% of world exports), Germany ($621M) and Mexico ($584M). World exports came to about $4.7B, 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.
Which countries are the top importers of thermostats (HS 903210)?
In 2025, the top importers of HS 903210 (the code used for thermostats) in UN Comtrade data were the United States ($1.1B, 23% of world imports), Germany ($445M) and China ($237M). World imports came to about $4.7B, 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 Thermostats the same in all countries?
The base HS code 903210 for Thermostats 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 thermostats in Brazil?
Brazil splits HS 903210 into 2 NCM codes, so the right one for thermostats depends on the product's details: 9032.10.10 (Fluid-expansion thermostats), 9032.10.90 (Other thermostats).