Harmonized System Code Classification

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

Specifically, the 90 category includes the following main categories:

• Optical instruments: Including glasses, 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 parameters.
• 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 category 90?

These products share the common characteristics of high precision, high technical content, and reliance on optical, electronic, or mechanical principles, and are mainly used in scientific research, industrial production, medical care, safety inspection, and other fields. Therefore, customs classify them into category 90 for easier management and statistics.

In summary, 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 of the HS code 9012 describe: Other microscopes (excluding optical microscopes); diffraction equipment; parts and accessories.

Specifically, it includes:

• Other microscopes (excluding optical microscopes)
• Diffraction equipment
• Parts and accessories

6-digit explanation: HS code: 9012.10

Classification: Microscopes (other than optical microscopes); diffraction devices; parts and accessories

Meaning: Refers to microscopes other than optical microscopes, diffraction devices, and their parts and accessories.

8-10 digit explanation: HS code: 9012100000

Classification: Microscopes (other than optical microscopes), diffraction devices; parts and accessories

Explanation: This HS code covers other types of microscopes besides optical microscopes, as well as diffraction devices and their parts and accessories.

Examples of products:

• Electron microscope
• Scanning tunneling microscope
• Atomic force microscope
• X-ray diffraction equipment
• Parts and accessories for electron microscopes
• Parts and accessories for scanning tunneling microscopes
• Parts and accessories for atomic force microscopes
• Diffraction gratings
• Diffraction accessories
• Parts of diffraction equipment