Harmonized System Code Classification

The first two digits of the HS code starting with 90 generally represent optical, photographic, cinematographic, measuring, testing, analyzing, and control instruments and their parts and accessories.

Specifically, Chapter 90 includes the following main categories:

• Optical instruments: Including eyeglasses, telescopes, microscopes, prisms, lenses, etc.
• Photographic and cinematographic instruments: Including cameras, video cameras, film, negatives, developing equipment, etc.
• Measuring and testing instruments: Including instruments for measuring length, weight, angle, temperature, pressure, flow, and other properties.
• Analyzing instruments: Including spectrometers, chromatographs, analytical balances, etc.
• Control instruments: Including automatic control systems, industrial automation equipment, etc.
• Medical, surgical, and dental instruments: Including some precision optical and electronic instruments.

Why is it 90?

These goods share the common characteristics of being high-precision, high-technical content, and relying on optical, electronic, or mechanical principles. They are mainly used in scientific research, industrial production, healthcare, and safety inspection fields. Therefore, customs classify them into Chapter 90 for easier management and statistics.

In short, HS codes starting with 90 represent precision instruments and meters, typically used in situations requiring precise measurement, analysis, control, or observation.

The first four digits explanation: 9027: Instruments and devices for physical or chemical analysis (e.g., polarimeters, refractometers, spectrometers, gas or smoke analysis devices); instruments and devices for measuring or checking viscosity, porosity, expansion, surface tension, or similar properties; instruments and devices for measuring or checking heat, sound, or light intensity (including exposure meters); microtomes; their parts and accessories.

6-digit explanation: HS code: 9027.10

Classification: Instruments and devices for physical or chemical analysis (e.g., polarimeters, refractometers, spectrometers, gas or smoke analysis devices); instruments and devices for measuring or checking viscosity, porosity, expansion, surface tension, etc.; instruments and devices for measuring or checking heat, sound, or light intensity, etc. (including exposure meters); microtomes; their parts and accessories: --> Gas or smoke analysis devices: --> Other: --> Other

Meaning: This includes gas or smoke analysis devices, which are a subcategory of instruments and devices for physical or chemical analysis, used to measure or check the composition, concentration, or other related parameters of gas or smoke.

8-10 digit explanation: hscode: 9027104000 Classification: Instruments and devices for physical or chemical analysis (e.g., polarimeters, refractometers, spectrophotometers, gas or smoke analysis devices); instruments and devices for measuring or checking viscosity, porosity, expansion, surface tension, or similar properties; instruments and devices for measuring or checking heat, sound, or light intensity (including exposure meters); microtomes; their parts and accessories --> Gas or smoke analysis devices --> Other --> Optical instruments and devices Explanation: This HS code falls under the category of instruments and devices for physical or chemical analysis, more specifically referring to other optical instruments and devices used for gas or smoke analysis.

Examples of products: - Gas chromatograph - Smoke analyzer - Optical gas detector - Infrared gas analyzer - Laser-based smoke detection system - Spectroscopic gas analysis equipment