electroscope
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 9031808085 | 35.0% | CN | US | Official Doc |
| 9031499000 | 35.0% | CN | US | Official Doc |
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⚛️ Electroscope (Electrostatic Detectors)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional-Level Strategy
📌 I. Product Definition and Classification: Do You Really Understand an "Electroscope"?
An electroscope is a historical and educational scientific instrument used to detect the presence and relative amount of electric charge. In international trade, it falls under the category of measuring or checking instruments. Because it is a specialized optical/mechanical device not specifically listed in other chapters, it is classified under Chapter 90.
⚠️ Key Distinction Point:
- If the device is a complete, self-contained instrument (gold leaf or metal foil type) used for measuring/checking electrical properties → It is classified as an "Other instrument, appliance, or machine." - It is NOT a component of a larger machine (like a generator) unless sold separately as a spare part, but typically, standalone electroscopes are classified under 9031.80. - It is NOT an optical instrument in the general sense (like a microscope or telescope), so it does not go to 9011, 9013, or 9014. It falls under the residual category of 9031.
📦 II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Applicable Scenario | Reason for Classification |
|---|---|---|---|
9031.80.85.85 |
Measuring or checking instruments, appliances and machines, not specified or included elsewhere in this chapter; profile projectors; parts and accessories thereof: Other instruments, appliances and machines: Other: Other | Standalone electroscopes, static charge detectors, educational physics kits with electroscopes | ✅ Correct: Fits the residual category for measuring instruments not listed elsewhere. |
9031.49.90.00 |
Other optical instruments and appliances: Other: Other | Incorrect for standard electroscopes. Only applies if the device is purely optical (e.g., lens-based charge measurement) which is rare. | ❌ Rare/Incorrect: Standard electroscopes are mechanical/electrical, not optical. |
🔍 Key Reminder:
- The vast majority of commercial and educational electroscopes are classified under 9031.80.85.85.
- The description "Other instruments, appliances and machines" in 9031.80 captures devices like electroscopes, galvanometers (if not in 9030), and other measuring devices.
💰 III. 2026 Latest Tariff Rate Breakdown (Including Surtaxes)
✅ Applicable Country: United States (US)
✅ Country of Origin: China (CN)
✅ Effective Date: Current rates apply (Section 301 + IEEPA)
🎯 1. 9031.80.85.85 —— Electroscope (Other Measuring Instruments)
| Item | Content |
|---|---|
| Base Tariff | 0.0% (Ad valorem) |
| USITC Additional Tariff (Section 301) | +25.0% |
| Total Tariff Rate | 25.0% |
| Tax Calculation | CIF Value × 25% |
| De Minimis Exemption | ❌ Not Eligible (Section 301 goods are generally excluded from de minimis if value exceeds threshold, but specific IEEPA/301 rules apply; typically high risk) |
| Legal Basis Path | USITC:9031.80.85.85 → FOOTNOTE:301.80.85 → 25% Surtax |
📌 Explanation:
- The base tariff for measuring instruments under 9031.80 is often 0%. - However, additional tariffs apply. According to the data provided, the total tax is 25.0%, consisting of 0% Base + 25% Additional. - This 25% is typically due to Section 301 tariffs on Chinese goods. - No IEEPA 10% is listed in the provided data for this specific HS code, so the total is strictly 25%.
🎯 2. 9031.49.90.00 —— Other Optical Instruments (Alternative/Edge Case)
| Item | Content |
|---|---|
| Base Tariff | 0.0% |
| USITC Additional Tariff (Section 301) | +25.0% |
| Total Tariff Rate | 25.0% |
| Tax Calculation | CIF Value × 25% |
| De Minimis Exemption | ❌ Not Eligible |
| Legal Basis Path | USITC:9031.49.90.00 → FOOTNOTE:301.49.90 → 25% Surtax |
📌 Note:
- If for some reason the electroscope is deemed an "optical appliance" (e.g., using light refraction to measure charge), it would fall here. - The tariff rate is identical (25%) to the main category. - Do not assume lower taxes by trying to reclassify; both paths result in 25%.
🛠️ IV. Customs Clearance Practical Advice (实战避坑指南)
✅ 1. Required Documentation Checklist
| Document | Mandatory | Description |
|---|---|---|
| ✅ Product Specification Sheet | ✔️ | Must clearly state: "Electroscope, Static Charge Detector, No Optical Components" |
| ✅ Product Photos | ✔️ | Clear images of the device, including brand, model, and any scales/dials |
| ✅ Commercial Invoice | ✔️ | Description must be precise: "Electroscope for Educational/Measuring Use" |
| ✅ Packing List | ✔️ | List all components (e.g., gold leaves, glass tube, base) |
| ✅ Certificate of Origin | ✔️ | Required to confirm Chinese origin for tariff calculation |
✅ 2. Declaration Tips (Key Mantras)
🔥 "Electroscope is a Measuring Instrument, not Optical. Declare under 9031.80!"
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| Standard Gold-Leaf Electroscope | 9031.80.85.85 |
Misdeclare as "Toy" or "Optical Instrument" |
| Digital Electrostatic Voltmeter | 9031.80.85.85 |
Misdeclare as "Part of Computer" (8543) |
| Optical Charge Detector (Rare) | 9031.49.90.00 |
N/A |
⚠️ Critical Warning:
- Do not declare as "Toy" (9503) or "Part of Machine" to avoid taxes. U.S. Customs and Border Protection (CBP) will verify the function. If it's for measuring charge, it must be 9031. - Misclassification can lead to audits, fines, and delayed shipment.
✅ 3. Special Cases
| Case | Handling Advice |
|---|---|
| Educational Kits | If the electroscope is part of a larger "Physics Kit," declare the main function. If measuring is primary, still 9031. |
| Digital vs. Analog | Both fall under 9031.80. Digital versions with sensors are still "measuring instruments." |
| Parts (Gold Leaves, Glass Tubes) | If sold separately as parts, they may fall under 9031.90 (Parts), which also carries 25% additional tariff. |
🌍 V. Global Market Customs Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff Rate | Certification Requirements | Remarks |
|---|---|---|---|---|
| 🇺🇸 USA | 9031.80.85.85 |
25% (25% Surtax) | None specific for standard electroscopes | High tariff due to Section 301 |
| 🇨🇳 China | 9031.80.85.85 |
0% | None | Import duty is 0% |
| 🇪🇺 EU | 9031.80 |
0% | CE Marking (if electrical) | No additional tariffs |
| 🇯🇵 Japan | 9031.80 |
0%~3% | PSE (if electrical) | Low tariffs |
| 🇬🇧 UK | 9031.80 |
0% | UKCA Marking | Post-Brexit rates similar to EU |
📌 Conclusion:
- USA is the only major market with a significant 25% surtax for Chinese-origin electroscopes.
- Cost Implication: A $1,000 electroscope will incur $250 in additional U.S. tariffs.
- Strategy: Factor this 25% into your pricing model.
📌 VI. Common Errors & Pitfalls (Blood Lessons)
❌ Error 1: Declaring an electroscope as "Optical Instrument" (9013) to try for lower rates.
👉 Consequence: CBP will reject it, classify it correctly under 9031, and charge 25% anyway. Plus, penalties for misdeclaration.
❌ Error 2: Not specifying "Measuring Instrument" in the invoice.
👉 Consequence: Customs may classify it as a "Part" (9031.90) or even "Miscellaneous" (9403), leading to delays while they request more info.
❌ Error 3: Assuming "Toy" classification.
👉 Consequence: If the device has precise measuring scales, it is not a toy. Misdeclaration leads to higher duties (toys can have varying rates, but 9031 is fixed at 25% for China).
✅ Correct Practice:
"Electroscope, Gold Leaf Type, for Measuring Static Electricity, Educational Use, Model XYZ, Made in China"
🎯 VII. Conclusion: Precision Classification Saves Money!
🎯 Remember the Mantra:
🔹 "Electroscope is Measuring, Not Optical. 9031.80 is the Key!"
🔹 "25% Surtax for China, Base 0%. Declare Clearly to Avoid Fines!"
📌 Pro Tip:
If your electroscope is shipped from Vietnam or Mexico, you may qualify for tariff exemptions under USMCA or other FTAs, potentially reducing the 25% surtax to 0%.
Recommendation:
📞 Consult a Professional Customs Broker + Provide Product Photos + Apply for Pre-Ruling if shipping large volumes.
🚀 Avoid Misclassification Penalties, Ensure Smooth Clearance!
✨ Professional Clearance Starts with Accurate Classification!
💼 Your Cost Efficiency Depends on Precision!
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About HS Code Classification
The Harmonized System (HS) is an internationally standardized nomenclature developed by the World Customs Organization (WCO) to classify traded products. Over 200 countries use the HS system as the basis for customs tariffs, trade statistics, and import/export regulations.
Each HS code follows a hierarchical structure:
- Chapter (2 digits) — Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) — More specific grouping within the chapter
- Subheading (6 digits) — Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) — Country-specific extensions for further classification, such as US HTSUS 10-digit codes
Correct HS code classification is essential for smooth customs clearance, accurate duty payment, and compliance with trade regulations. Misclassification can lead to customs delays, overpayment of duties, or penalties.
When importing from CN to US, the applicable tariff rates may include:
- Most-Favored-Nation (MFN) rate — The standard duty rate applied to WTO members
- General rate — Applied to countries without trade agreements
- Trade remedy duties — Additional tariffs such as Section 301 (anti-dumping), Section 232 (national security), or countervailing duties
The information provided on this page is for reference purposes only. For official classification, please consult with your local customs authority or a licensed customs broker.