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; parts and accessories thereof:
Part of: 90 — Optical, photographic, medical or surgical instruments and apparatus
N364446 · 2026-08-27 — RE: The tariff classification of a continuous glucose monitor smart transmitter from China
Descriptive literature was provided for our review. The item under consideration is described as a smart transmitter, which is a specialized, reusable medical device designed exclusively for use with the Eversense365 Continuous Glucose Monitoring (CGM) system. As an integral component of this system, the transmitter is worn externally over an implanted glucose sensor to provide power and facilitate the wireless transmission of real-time glucose data, alerts, and trends to a compatible mobile application. Engineered for continuous wear, the device features an oval-shaped polycarbonate…
N360516 · 2026-04-29 — The tariff classification of insulin pump patches and continuous glucose monitor patches from China
Additional information was provided via email dated April 28, 2026. The products under consideration include the Tandem Mobi Pocket Patch, Medtronic Guardian/Enlite Patch, Omnipod Patch, Libre 3+ Patch, and Dexcom G6 Patch. These are specially designed adhesive patches used to secure insulin pumps or continuous glucose monitors (CGMs) to the skin. Such devices are widely used by patients with chronic diabetes, a condition in which the body cannot effectively produce or utilize insulin. The patches are tailored for specific models of CGMs and insulin pumps, ensuring firm attachment during…
N355538 · 2025-11-25 — The tariff classification of a continuous glucose monitor from China
Descriptive literature was provided for our review. The item under consideration is described as the KOS Argus Non-Invasive Continuous Glucose Monitor (CGM), which is a prescription, non-invasive device used to continuously measure, record, analyze, and display real-time glucose values using infrared, red, and green sensors. The tri-wavelength optical system interrogates different tissue compartments. The green-light spectrum penetrates the epidermis, capturing superficial capillary bed dynamics. The red-light spectrum reaches the dermis layer, monitoring intermediate vascular networks.…
N351195 · 2025-07-21 — The tariff classification of Balanced Detectors from Germany
Descriptive literature was provided for our review. The items under consideration are described as Balanced Detectors (model numbers BD-HQE-1550 and BD-HQE-1064), which are high-quantum efficiency (HQE) balanced photodetectors designed for operation at a wavelength of 1550 nanometers (nm) and 1064 nm respectively. Balanced Detectors are devices that utilize two precisely matched photodiodes and a differential amplifier to subtract two optical input signals from each other. This subtraction process effectively cancels out common-mode noise (like laser intensity fluctuations) present in both…
N350642 · 2025-07-16 — The tariff classification of sensors from China
Descriptive literature was provided for our review. The first item under consideration is the Senstick SSM40, which is a LoRaWAN-based soil moisture sensor designed to monitor volumetric water content in soil. It operates autonomously for up to 7 years in harsh conditions, making it particularly useful in remote or unattended environments. The SSM40 generates variable electrical signals corresponding to the Volumetric Water Content (VWC) of the soil, ranging from 0% to 100%. These signals are interpreted internally and converted into digital data, which is then transmitted over LoRaWAN. The…
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