Chapter 90 is the core chapter in the HS classification system for optical, photographic, cinematographic, measuring, checking, medical or surgical instruments and apparatus, and precision instruments and apparatus. This chapter covers an extremely broad range, from spectacle lenses, microscopes, and lasers to medical diagnostic equipment and industrial metering instruments. Its core characteristic is that the goods possess precision measurement, detection, analysis, or medical treatment functions, usually involving optical, electronic, or mechanical precision technology. This chapter is clearly distinguished from Chapter 84 for mechanical appliances and Chapter 85 for electrical equipment: if the primary function of the goods is medical diagnosis or treatment, even if they contain electronic components, they are still preferentially classified under Chapter 90. Heading 9018 covers medical, surgical, dental, or veterinary instruments and appliances, including scintigraphic apparatus, other electromedical apparatus, and sight-testing instruments. This heading includes both diagnostic equipment (such as electrocardiographs, ultrasonic diagnostic apparatus, and MRI equipment) and therapeutic equipment (such as laser therapeutic apparatus and dialysis machines), as well as dental and veterinary specialized instruments. The core criterion is that the goods must be exclusively used in the medical, surgical, dental, or veterinary field and possess diagnostic, therapeutic, surgical, or examination functions. If a vehicle-mounted medical testing device has medical testing as its core function, it is classified under this heading. HS code 901820 has 6 digits. The first 2 digits "90" represent Chapter 90, namely the chapter for optical, medical, and other precision instruments, which is the first-level classification of the entire classification system and determines the broad category of the goods. Digits 3-4 "18" represent heading 9018, namely medical, surgical, dental, or veterinary instruments and appliances, which is the second-level classification and limits the goods to the medical and health field. Digits 5-6 "20" are the subheading, further subdivided under heading 9018. 901820 specifically refers to "vehicle-mounted medical testing devices," namely specialized equipment installed on vehicles and used for medical testing. This subheading is parallel to 901811 (electrocardiographs), 901812 (ultrasonic diagnostic apparatus), etc., reflecting the principle of subdivision by specific type of medical equipment. Classification under 901820 means that the device is a medical testing instrument designed specifically for the vehicle environment, rather than ordinary vehicle-mounted electronic equipment. The reason a vehicle-mounted medical testing device is classified under 901820 rather than adjacent codes lies in its "medical testing" function. If it is merely vehicle-mounted electronic equipment (such as tire pressure monitoring or reversing radar), it should be classified under Chapter 85 or Chapter 87; if it is an ordinary medical testing device but not specifically for vehicle mounting, it may be classified under other subheadings of 9018. 901820 explicitly refers to vehicle-mounted medical testing devices, emphasizing that they are combined with vehicles and used for medical testing. Therefore, the goods must simultaneously satisfy both conditions of "vehicle-mounted" and "medical testing" to be classified under this code.

Product Name: The standard name of the declared goods, which should use a standardized Chinese or English name, such as "vehicle-mounted medical testing device." Use: Explain the specific use of the goods, such as "used on vehicles for real-time medical testing of drivers or passengers." Working Principle: Briefly describe the technical principle of the testing device, such as "based on biosensors and microprocessors, collecting physiological signals and analyzing them." Brand: The brand name of the declared goods; if there is no brand, indicate "no brand." Model: The specific model of the declared goods, used to distinguish different specifications under the same brand. Testing Items: List the medical parameters that the device can test, such as heart rate, blood oxygen, blood pressure, body temperature, etc. Installation Method: Explain how the device is installed on the vehicle, such as "embedded installation on the dashboard" or "portable placement." Whether It Has Medical Diagnostic Function: Clarify whether the device is used for medical diagnosis or only for health monitoring. Customs declaration example: Product Name: vehicle-mounted medical testing device; Use: installed in an ambulance for real-time monitoring of patients' heart rate and blood oxygen; Working Principle: collects photoplethysmographic pulse waves through a finger-clip sensor and obtains heart rate and blood oxygen values through microprocessor analysis; Brand: MEDTRONIC; Model: CAR-100; Testing Items: heart rate, blood oxygen saturation; Installation Method: embedded installation in the medical compartment of an ambulance; Whether It Has Medical Diagnostic Function: yes. Mistakenly declaring vehicle-mounted health monitoring equipment (such as smart bracelets) as medical testing devices, when they should actually be classified under other codes. Failure to provide a list of testing items, causing customs to question its medical use and possibly classify it as ordinary electronic equipment. Ignoring the "vehicle-mounted" characteristic and declaring it only as a medical testing device, possibly resulting in classification under other subheadings of 9018 rather than 901820.

The core criteria for classification are: 1) whether the goods are exclusively used in the medical, surgical, dental, or veterinary field; 2) whether they possess medical testing or diagnostic functions; 3) whether they are designed specifically for the vehicle environment or installed on vehicles. According to the Explanatory Notes to the Harmonized Commodity Description and Coding System, heading 9018 includes medical diagnostic equipment, while subheading 901820 explicitly refers to vehicle-mounted medical testing devices. If the device is only for health monitoring and has no medical diagnostic function, it may be classified under 9027 (physical or chemical analysis instruments) or Chapter 85. If the device is vehicle-specific electronic equipment but has no medical function, it is classified under Chapter 87 or Chapter 85. Therefore, both medical use and vehicle-mounted characteristics must be satisfied simultaneously. 901811 Electrocardiographs: 901811 specifically refers to electrocardiographs, including vehicle-mounted types; while 901820 is a broader category of vehicle-mounted medical testing devices, not limited to electrocardiography. If the device only records electrocardiograms, it should be classified under 901811. 901812 Ultrasonic diagnostic apparatus: 901812 is ultrasonic diagnostic apparatus, including vehicle-mounted ultrasound; 901820 covers vehicle-mounted medical equipment using other testing principles. If the device uses ultrasonic principles, it should be classified under 901812. 9027 Physical or chemical analysis instruments: 9027 is used for non-medical physical and chemical analysis, such as blood analyzers (not for medical diagnosis). If the vehicle-mounted testing device is used for non-medical purposes (such as environmental monitoring), it should be classified under 9027. 8708 Motor vehicle parts and accessories: 8708 covers vehicle parts such as sensors and instrument panels. If the vehicle-mounted testing device is only for vehicle operation monitoring (such as tire pressure), it should be classified under 8708; but if it has medical testing functions, it is classified under 9018. 8517 Communication equipment: 8517 covers communication equipment, such as vehicle-mounted communication terminals. If the main function of the testing device is communication rather than medical testing, it should be classified under 8517. Is the device exclusively used for medical diagnosis or treatment? Is the device designed to be vehicle-mounted or installed on vehicles? Does the device have medical testing functions rather than only health monitoring? Is the device excluded from other subheadings of 9018? Is the device not classified under Chapter 85 or Chapter 87?

What is the difference in HS codes between vehicle-mounted medical testing devices and ordinary medical testing devices? Ordinary medical testing devices are classified under different subheadings of 9018 according to function, such as electrocardiographs under 901811 and ultrasound under 901812. Vehicle-mounted medical testing devices specifically refer to medical testing equipment designed for the vehicle environment and installed on vehicles, classified under 901820. If an ordinary testing device can also be used in vehicles but is not specifically designed for that purpose, it is still classified according to its original function. How do you determine whether a vehicle-mounted medical testing device is classified under 901820 or 8708? The key is the core function. If the device is mainly used for medical testing (such as monitoring heart rate and blood oxygen), even if installed on a vehicle, it should be classified under 901820. If the device is only for vehicle operation monitoring (such as tire pressure or engine testing), it is classified under 8708. Medical use is the decisive factor. What special documents are required when declaring 901820? In addition to regular customs declaration documents, it is recommended to provide: 1) medical device registration certificate or filing certificate (if applicable); 2) product manual clearly stating medical use and testing items; 3) vehicle installation certificate or design drawings proving the vehicle-mounted characteristic. These help customs confirm the classification. If a vehicle-mounted medical testing device has communication functions, will that change the classification? No. Classification is based on the primary function. If the primary function is medical testing, even if it has communication functions (such as data transmission), it is still classified under 901820. However, if the communication function is the primary function, it may be classified under 8517. The primary function must be judged based on product design. What is the export tax rebate rate for 901820? How can it be checked? The export tax rebate rate is adjusted with national policies and is not fixed. The latest rebate rate can be obtained through the official website of the State Taxation Administration, the customs tariff query platform of the General Administration of Customs, or by consulting a professional customs broker. It is recommended to use the actual rate at the time of declaration. If a vehicle-mounted medical testing device is imported for research and development, can it be exempt from tax? It may qualify for the tax exemption policy for scientific and educational supplies, but the following conditions must be met: 1) used for scientific research or teaching; 2) complies with the Catalog of Tax-Exempt Imported Scientific and Educational Supplies; 3) relevant certificates are provided. Specific inquiries can be made to the local customs tax reduction and exemption department. For cross-border e-commerce sales of vehicle-mounted medical testing devices, how should the HS code be selected? Cross-border e-commerce should select the code based on the actual function of the goods. If it is medical testing equipment, 901820 should be selected; if it is a health monitoring electronic product, it may be classified under other codes. It is recommended to consult professional classification personnel to avoid customs clearance delays caused by classification errors. What is the difference between 901820 and 901819? 901819 is another subheading under 9018, usually referring to medical instruments not otherwise specified. 901820 specifically refers to vehicle-mounted medical testing devices. If the device is a vehicle-mounted medical testing device, it is preferentially classified under 901820; if it is another non-vehicle-mounted medical testing device, it may be classified under 901819.