Climatic Test Chambers Classifiable Under CTH 9027 as Physical Analysis Apparatus

In re Weiss Technik India Private Limited (CAAR Mumbai)

The Customs Authority for Advance Rulings (CAAR), Mumbai, has issued a ruling classifying “Climatic Test Chambers” under Customs Tariff Heading (CTH) 9027, specifically under the residual sub-heading 9027 89 90. The decision was made in the case of In re Weiss Technik India Private Limited, which sought clarity on the appropriate tariff classification for the equipment it imports.

The authority concluded that these chambers function as apparatus for physical analysis, thereby falling within the scope of the specified heading.

Product Function and Analysis

According to submissions by the applicant, Climatic Test Chambers are specialized equipment designed to simulate a range of environmental conditions, including temperature, humidity, pressure, and vibration. Industries such as automotive, aerospace, and electronics use these chambers to test the durability, performance, and reliability of products and components under controlled, simulated real-world stresses.

The CAAR’s findings established that the primary function of the chamber is to conduct physical analysis. It subjects a material or product to environmental stressors to observe and measure its physical responses—such as expansion, contraction, warping, cracking, or loss of strength—without altering its chemical composition. For example, the chamber can test how a plastic component responds to extreme heat or how an electronic part withstands high humidity. This process of examining a product’s physical properties under stress was deemed to fit the definition of physical analysis.

Legal Reasoning and Classification

The ruling was based on the General Interpretative Rules (GIR) of the Customs Tariff Act, 1975, which mandate that classification be determined by the terms of the headings and any relevant section or chapter notes.

CTH 9027 covers “instruments and apparatus for physical or chemical analysis…; instruments and apparatus for measuring or checking viscosity, porosity, expansion, surface tension or the like…”. The authority noted that the scope of this heading is broad and is not limited to small laboratory instruments.

Since the Climatic Test Chamber is used to check for physical changes like expansion and material fatigue under various climatic conditions, the CAAR determined that it qualifies as an “apparatus for physical analysis.” As no specific sub-heading exists for such equipment within CTH 9027, it was placed under the residual or “Other” category, leading to the final classification under tariff item 9027 89 90.

Judicial Precedent Cited

To support its conclusion, the CAAR placed reliance on a previous decision by the Customs, Excise and Service Tax Appellate Tribunal (CESTAT), Bangalore, in the case of VDO India Vs. CC (2005). In that matter, the tribunal held that “Climatic Test Cabinet Systems,” which perform a similar function of testing products during temperature variations, were correctly classifiable under sub-heading 9027.80 (a previous iteration of the current tariff). The tribunal had observed that the scope of Heading 9027 was wide enough to include such apparatus, reinforcing the CAAR’s current interpretation

FULL TEXT OF THE ORDER OF CUSTOMS AUTHORITY OF ADVANCE RULING, MUMBAI

M/s. Weiss Technik India Private Limited (having IEC No. 0911015515) and hereinafter referred to as ‘the applicant’, in short) filed an application (CAAR-1) for advance ruling before the Customs Authority for Advance Rulings, Mumbai (CAAR in short). The said application was received in the secretariat of the CAAR, Mumbai on 09.06.2025 along with enclosures in terms of Section 28H (1) of the Customs Act, 1962 (hereinafter referred to as the ‘Act’ also). The applicant is seeking advance ruling on the issue of classification of Climatic Test Chamber under CTI 90278990 (Other) of the First Schedule of the Customs Tariff Act, 1975 or otherwise.

2. The Applicant vide their application has submitted as follows:

2.1 M/s. Weiss Technik India Private Limited (hereinafter referred to as the “Applicant”) is a Private Limited Company duly incorporated under the provisions of the Companies Act, 1956, having its registered office at Legend-Gold Leaf Premises 3/A,3rd Floor No: 3-4-559 to 566, Narayanaguda, Hyderabad, Telangana 500 029.

2.2 The Applicant is a subsidiary of Weiss Umwelttechnik GmbH, a leading German manufacturer of a wide range of equipment/products in the fields of environmental simulation, heating technology, and plant growth chambers.

2.3 The Applicant specializes in the sales, training, and service of the equipment manufactured by its parent company to various industries, including automotive, electronics, pharmaceuticals. These equipments are manufactured outside India and are regularly imported by the Applicant for domestic trading and training purposes.

Import of Climatic Test Chambers:

2.4 The Applicant has been importing ‘Climatic Test Chambers’, and classifying the same under Heading
84.79 of the Customs Tariff as Machines and mechanical appliances having individual functions not specified or included elsewhere in this chapter’.

About the product in question:

2.5 Climatic Test Chambers are specialized equipment used to simulate various environmental conditions
to test the durability, performance, and reliability of products. These chambers control temperature and humidity and/or other environmental factors to replicate conditions such as extreme heat, cold, humidity. They are essential in industries like automotive, electronics, aerospace, and pharmaceuticals, where products must withstand diverse climatic conditions. Illustrative image of a Climatic Test Chamber is as below:

2.6 Applicant’s parent company manufactures various models and series of ‘Climatic Test Chambers. Primarily, all these different models and series of ‘Climatic Test Chambers’ use the same mechanism of controlling temperature and humidity for analysing a media/specimen.

2.7 However, in certain models and series, additional features like intense vibrational force, solar simulation using metal halide lamp, pressure variation testing feature are also present. The additional features are used to ensure precise simulation for testing certain specific products. For instance, for testing of products belonging to automotive and aerospace sectors which are exposed to intense vibrational forces, testing based only on temperature and humidity control is not sufficient and for precise simulation, using vibrational force is also required. This allows to investigate stress limits of a particular product in advance to ensure safe driving and flying operations.

2.8 Therefore, all the models/series of the ‘Climatic Test Chambers’ necessarily have temperature and humidity control features and may have additional features for ensuring precise simulation. The following table provides details of all models that are part of the present application:

Process Flow Chart on usage of Climatic Test Chambers:

2.9 The following flow chart provides detailed analysis on the usage and functions of the Climatic Test Chambers:

Test Prcpursation

2.10 In view of the above, it is correct to state that the Climatic Test Chambers are devices/equipment designed for conducting physical analysis of products under various climatic conditions.

Applicant’s interpretation of Law/Facts

3.1 The Applicant submits that “Climatic Test Chambers are classifiable under Heading 90.27, specifically Tariff Item 9027 89 90 of the Customs Tariff as “Instrument and apparatus for physical analysis: Other: Other”.

3.2 Heading 90.27 covers ‘Instruments and apparatus for physical or chemical analysis (for example,  polarimeters, refractometers, spectrometers, gas or smoke analysis apparatus); instruments and apparatus  for measuring or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters);  microtomes’.

3.3 The Applicant submits that the most important parameter to determine whether a product falls under Heading 90.27 is whether the product performs the function of physical analysis.

3.4 The words “physical analysis” is neither defined in the Customs Tariff nor in the Explanatory Notes to the Harmonised System of Nomenclature (hereinafter referred to as “HSN”).

3.5 Reliance is placed on decision of the U.S. Court of International Trade in Pharmacia Fine Chemicals, Inc. Vs. United States -9 CTT 438, 441 (1985), wherein it was held that the phrase “instruments and apparatus for physical and chemical analysis” describes articles that are chiefly used to perform or facilitate physical or chemical determination of the quantity, qualities, or composition of a substance.

3.6 The ‘Climatic Test Chambers are apparatus that perform physical analysis of a particular specimen to identify the quality of the specimen and whether it can withstand different climatic conditions across the globe. First and foremost, the Climatic Test Chambers carry out testing of a specimen in a specified climatic condition using environment simulation methodology (i.e., testing the specimen in a controlled climatic condition by setting temperature and humidity levels). Thereafter, the apparatus using the data collected by various sensors (including high-precision psychrometric sensors) offers graphical/statistical data to visualize temperature and humidity trends in the chamber and its impact on the temperature of the specimen during the process of testing. For generating the graphical/statistical data, the ‘Climatic Test Chambers’ uses SIMPATI® software.

3.7 Further, the viewing window on the ‘Climatic Test Chambers’ allows the person conducting the test to identify and analyse the behaviour of the specimen under specific climatic conditions. In other words, the viewing window enables the person conducting the test to analyse expansion or contraction of the specimen at a particular temperature/humidity level.

3.8 Further, the classification of “Climatic Test Chambers’ under Chapter 90 of the Customs Tariff is also supported by the HSN to Chapter 90.

3.9 In the HSN, the General Note (I) to Chapter 90 specifically provides that this Chapter inter alia covers instruments and apparatus ‘for scientific purposes (laboratory research work, analysis, astronomy, etc.), for specialised technical or industrial purposes (measuring or checking, observation, etc) or for medical purposes”. Furthermore, the General Note (1) to Chapter 90 also specifically states that this chapter includes in particular “machines, instruments and appliances for testing materials”.

3.10 The ‘Climatic Test Chambers manufactured by the parent company of the Applicant are used for testing of products manufactured by various sectors including the automotive, electronics, pharmaceuticals. All these specified industries use the product in question to ensure that the automotive products, electronics equipment, medicines, medical equipment, etc. manufactured by them are fit for use in different climatic conditions and to meet the global testing standards like International Electrotechnical Commission, Joint Services Specification, Military Standard, International Organisation for Standardization, etc.

3.11 At this juncture, reliance is placed on the decision of Hon’ble CESTAT. Bangalore in VDO India Vs. CC-2005 (186) ELT 408 wherein it was held that “Climatic Test Cabinet System that are equipment used to test function of certain products during temperature variations are correctly classifiable under sub-Heading 9027 80. Relevant portion of the decision is reproduced below:

“

….

No doubt the apparatus or instruments indicated in CH 9027 measure certain parameters. As per HSN Explanatory Notes, even electronic smoke detectors and fire damp detectors etc., are classifiable under this heading. In those cases also there may not be the measurement of any parameter. In the present case, the equipment is used to test the function of the products manufactured by VDO during temperature variations. At certain temperatures, the products may not function and even may break down. This can be seen visually. A perusal of the technical literature indicates that the equipment can be adjusted for different temperatures. In fact the temperature range is from -70°C to 130°C. It would definitely be possible to find out at what temperature the material breaks down. Hence in our view, this is an apparatus for physical analysis and it would definitely indicate the temperature at which the product breaks down. Otherwise, the climate test cabinet system will have no use. Under these circumstances, the classification of item under 9027.80 appears to be correct. The insistence that apparatus should measure some parameters is not a proper ground to reject the classification under 9027.80. Revenue’s contention that the item being an electrical one should be classified under 8543.89 does not appear to be correct. In view of our above findings, we allow the appeal ofM/s. VDO and reject the Revenue’s appeal”

(Emphasis supplied)

3.12 Globally also, identical/similar products have been classified under Heading 90.27. Pertinently-, the European Union’s Binding Tariff Information (BTI) Ruling on classification of Climatic Test Chambers manufactured by Applicant’s parent company also specify that the Climatic Test Chambers are classifiable under Heading 90.27 as “apparatus for physical examination”. The BTI Ruling in favour of Applicant’s parent company along with its English translation are collectively enclosed herewith as Exhibit -4 to the application.

3.13 In view of the above, the Applicant submits that Climatic Test Chambers are correctly classifiable under Heading 90.27 of the Customs Tariff.

3.14 Furthermore, it is pertinent to note that the High-precision Psychrometric Sensors that are fitted in the Climatic Test Chambers are also specifically covered in the Chapter 90. Heading 90.25 of the Customs Tariff reads as follows “Hydrometers and similar floating instruments, thermometers, pyrometers, barometers, hygrometers and psychrometers, recording or not, and any combination of these instruments”.

3.15 Since psychrometer, which is one of the components of Climatic Test Chambers, is specifically classifiable under Chapter 90, the Climatic Test Chambers are also correctly classifiable under Heading 90.27 as they perform the function of complete physical analysis of a given media/specimen.

3.16 Lastly, the Applicant submits that all the Climatic Test Chambers have the feature of controlling the temperature and humidity. However, based on the specific testing requirement for a particular product and to ensure precise environmental simulation, the Climatic Test Chamber may also have additional features like Vibration Testing Solar Simulation Testing, Pressure Variation Testing, etc.

3.17 Since all the Climatic Test Chambers necessarily have the temperature and humidity controlling feature and essentially perform the function of physical analysing products, the Climatic Test Chambers with additional features are also correctly classifiable under Tariff Item 9027 89 90 of the Customs Tariff.

Port of Import and reply from concerned jurisdictional Commissionerate

4.1 The applicant in their CAAR-1 indicated that they intend to import the subject goods i.e. Climatic Test Chamber at the jurisdiction of Office of the Commissioner of Customs, NS-V. JNCH. The application was forwarded to the Office of the concerned Commissionerate for their comments on 17.06.2025, 18.08.2025 & 16.09.2025.

However, this office has not received any comments/response in this matter till now.

Details of Hearing

5.1 A personal hearing in this matter was held on 13.08.2025. Sh T. Vishwanathan sr Advocate appeared for hearing in the matter. He reiterated the contention filed with the application, that the subject import goods are “Climate Test Chambers” to be used in physical analysis or checking a wide range of products on the parameters of – cold, heat, humidity etc. in controlled environmental conditions, and merit classification under CTH 9027; more particularly under CTI 90278990 — Other.

Nobody appeared from department side for hearing in this matter.

Additional submission

6.1 The applicant vide their email dated 14.08.2025 has submitted the additional submissions as follows:

6.2 The HSN Explanatory Notes to Chapter 90 covers instruments and apparatus used inter a/ia for scientific/industrial/technical purposes for measuring, checking or visually observing the behavioural changes on a particular product. The relevant portion is reproduced below:

GENERAL

(1) GENERAL CONTENT AND ARRANGEMENT OF THE CHAPTER

This Chapter covers a wide variety of instruments and apparatus which are, as a rule. characterised M their high finish and high precision. Most of them arc used mainly for scientific purposes (laboratory research work. analysis. astronomy. etc.). for specialise technical or industrial purfsoses (measuring or checking. observation. etc.! or for medical purposes.

6.3 Explanatory Notes to the Combined Nomenclature of the European Union specifically provides that sub Heading 9027 80 99 includes climatic testing cupboards/chambers wherein specimen are exposed to environmental conditions (specific temperature and humidity conditions) to test their service life, insulation, etc. Relevant EU Explanatory Note is provided at page 19 — 21 of the Compilation and snapshot of the relevant portion is reproduced below:

6.4  subject goods in question also perform the identical function of testing and analysing specimen under set temperature and humidity conditions. Therefore, merit classification under Heading 9027 as clear from the above EU Explanatory Notes.

6.5 On a combined reading of the Brussels Tariff Nomenclature for classification of goods in Customs Tariff — 1976 and Compendium of Classification Opinions — Customs Cooperation council — 1976, it clearly appears that cabinets that test the behaviour of materials using rapid variations in temperature, humidity are classifiable as ‘instruments and apparatus for physical analysis’. Brussels Tariff Nomenclature for classification and Compendium of Classification Opinions are provided at page 21A— 21H of the Compilation and snapshot of the relevant portions are reproduced below:

6.6 Lastly, reliance is placed on the BTI Ruling concerning classification of the identical goods in an application filed by Applicant’s parent company, wherein it was held that since the subject goods are used to test the behavior (visually) of a sample under specific climate, the said goods are correctly classifiable under Heading 90.27 as apparatus for physical analysis. The BTI Ruling along with its English translation is provided at page 24 — 28 of the Compilation.

6.7  The above decision and the Advisory Opinion of BTN (predecessor to HSN) and the EU Combined Nomenclature suggest that the testing of physical parameters of the specimen by the climatic chambers for visual observation is a good enough criterion for the purposes of classifying them under Heading 90.27. Globally, the classification of the subject goods is also aligned at the six-digit tariff level. Hence, it is submitted that Climate Test Chambers are correctly classifiable under Tariff Item 9027 89 90 of the Customs Tariff.

Discussion and findings

7.1 I have carefully considered all the materials placed before me in respect of the subject goods. I have
also examined the submissions made by the applicant during the personal hearing as well as the additional written submissions. Accordingly, I proceed to pronounce my ruling on the basis of the information available on record and within the framework of the applicable legal provisions.

7.2 At the outset, I find that the issue raised in the question in the Form CAAR-1 is squarely covered under Section 28H(2) of the Customs Act, 1962, being a matter related to classification of goods under the provisions of this Act.

7.3 Before deciding the issue, let me deliberate on the legal framework prescribed in Customs Tariff Act, 1975, Chapter/ Section notes along with HSN explanatory notes. As per Rule 1 of GM, the titles of Sections, Chapters and sub-Chapters are provided for ease of reference only; for legal purposes, classification shall be determined according to the terms of the headings and any relative Section or Chapter Notes.

7.4 The Applicant has submitted that Climatic Test Chambers are specialized equipment used to simulate various environmental conditions in order to test the durability, performance, and reliability of products. These chambers regulate temperature, humidity, and other environmental parameters to replicate conditions such as extreme heat, cold, and humidity. They are widely used in industries such as automotive, electronics, aerospace, and pharmaceuticals, where products are required to withstand diverse climatic conditions.

In certain models and series, additional features such as intense vibrational force, solar simulation using metal halide lamps, and pressure variation testing are also incorporated. These advanced features are designed to ensure precise simulation for testing specific categories of products. For example, in the automotive and aerospace sectors, where components are exposed to intense vibrational forces, testing based solely on temperature and humidity is insufficient. In such cases, the application of vibrational force is essential to replicate real-world conditions and to assess the stress limits of a product in advance, thereby ensuring safety in driving and flying operations.

Accordingly, while all models and series of Climatic Test Chambers are equipped with temperature and humidity control features, certain models also incorporate additional functionalities to provide more precise and comprehensive environmental simulations.

7.5 Based on the submissions made by the Applicant, it is understood that the goods under consideration— namely, the Climatic Test Chamber is a specialized equipment used to artificially create and control different environmental conditions such as temperature, humidity, light, vibration, or even pressure, so that products, materials, or components can be tested for durability, reliability, and performance under those conditions.

It is noted that physical analysis means examining or testing a substance, material, or product based on its physical properties — that is, properties which can be observed, measured, or tested without changing its chemical composition.

A climatic chamber does not change the chemical composition of the sample, but it exposes the material to controlled environmental stresses (heat, cold, moisture, etc.) to measure physical responses such as expansion, contraction, warping, cracking, or strength loss.

Accordingly, a climatic test chamber is used for the physical analysis of durability, stability, and performance of the product, material or component.

7.6 I note that the Chapter Tariff Heading 9027 covers “instruments and apparatus for physical or chemical analysis (for example, polarimeters, refractometers, spectrometers, gas or smoke analysis apparatus); instruments and apparatus for measuring or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes.”. The relevant portion of CTH 9027 is reproduced below for ease of reference:

7.7 It is noted that the Heading 9027 covers instruments and apparatus for physical or chemical analysis, including:

• Devices that test physical properties (viscosity, porosity, expansion, surface tension, etc.).
• Devices that measure or check quantities of heat, sound, or light.

A key point is that the heading is not limited to small analytical instruments; it also includes apparatus designed to analyse or measure the physical properties of materials or products.

Further the General Note 1 to the HSN Explanatory Note provides the Content and the arrangement of the Chapter 90 which specifies to cover a wide variety of instruments and apparatus. They are used mainly for specific purposes (laboratory research work, analysis, astronomy etc.) for specialised technical or industrial purposes (measuring or checking, observation etc.) or for medical purposes.

7.8 In the present case, the Climatic Test Chamber performs the function of physical analysis by artificially creating and controlling environmental conditions such as temperature, humidity, light, vibration, and pressure, and exposing products, Materials, or components to these stresses. The purpose of such testing is not to alter the chemical composition of the material but to examine its physical behaviour and performance when subjected to extreme or varying climatic conditions. By simulating heat, cold, moisture, or light, the chamber enables observation and measurement of physical responses such as expansion, contraction, warping, cracking, fading, or strength loss. For instance, metals and plastics may expand in heat and contract in cold, electronics may warp or malfunction under high humidity, coatings may peel or fade under UV exposure, and mechanical parts may show fatigue or cracking under combined vibration and temperature cycles. These outcomes represent changes in physical properties that can be observed, measured, and quantified without altering the inherent chemical nature of the material. In this manner, the Climatic Test Chamber provides a reliable means of assessing durability, stability, and performance of products, thereby serving as an apparatus for physical analysis.

7.9 Based on the technical data and supporting documentation submitted by the applicant, it is evident that the Climatic Test Chamber qualifies as an apparatus for physical analysis. Heading 9027 of the First Schedule to the Customs Tariff Act, 1975, specifically covers instruments and apparatus for physical or chemical analysis. Accordingly, in terms of General Interpretative Rule 1 (GIR 1) read with the HSN Explanatory Notes, the subject goods, namely Climatic Test Chambers. merit classification under Heading 9027. Since there is no specific sub-heading for such goods under Heading 9027, they are appropriately classifiable under the residual entry i.e., 9027 89 90 (Other) of the First Schedule to the Customs Tariff Act, 1975.

7.10 I also place reliance on the decision of the Hon’ble CESTAT, Bangalore in VDO India Vs. CC— 2005 (186) ELT 408, wherein it was categorically held that “Climatic Test Cabinet Systems, which are equipment used to test the function of certain products during temperature variations, are correctly classifiable under sub­heading 9027.80.” The Tribunal, while dealing with the classification issue, observed that although instruments or apparatus under Heading 9027 generally measure certain parameters, the scope of the heading is wider, as explained in the HSN Explanatory Notes. It was noted that even items such as electronic smoke detectors and fire damp detectors, which may not directly measure parameters, are classifiable under Heading 9027.

8. In view of the above facts and circumstances of the case, I am of the considered view that the product in question namely, Climatic Test Chamber, merit classification under CTH 9027 (Instruments and apparatus for physical or chemical analysis (for example, polarimeters, refractometers, spectrometers, gas or smoke analysis apparatus); instruments and apparatus for measuring or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes), more specifically under CTI 90278990 (Other) of the First Schedule of the Custom Tariff Act, 1975.

9. I rule accordingly.