Sourcing electronic signal generators from China
Electronic signal generators from China carry 0% UK customs duty under 8543 20 00 00, with no listed trade remedy. Equipment liable to generate electromagnetic disturbance falls within the electromagnetic compatibility rules, subject to exceptions. Cambridge China Bridge sources electronic signal generators.
Duty on electronic signal generators
Read from the UK Trade Tariff on 4 October 2026, signal generators under 8543 20 00 00 carry 0% duty for goods from China. The supplied tariff record lists no anti-dumping or countervailing duty, suspension or import control for this line.
Heading 8543 covers electrical machines and apparatus with individual functions, not specified elsewhere in the chapter. This guide covers electronic signal generators only. The table shows different generator types sharing the same tariff line, rather than separate commodity lines.
Confirm the commodity code against the instrument's actual function and datasheet. For related test instruments, see oscilloscopes and multimeters. Do not select a code merely because the supplier calls the product laboratory equipment.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Electronic function generators | 8543 20 00 00 | 0% | None |
Specify the waveform and its test conditions
Specify waveform types, frequency range, amplitude accuracy, output impedance, offset, distortion, pulse rise time and channel synchronisation. For radio-frequency models, add phase noise, harmonics, modulation functions and reference-clock connections. State the load, warm-up conditions and measurement method for acceptance, so a display reading cannot substitute for a measured output.
Equipment liable to generate electromagnetic disturbance is within the Electromagnetic Compatibility Regulations 2016, subject to exceptions. For mains-powered models, confirm the scope of the Electrical Equipment (Safety) Regulations 2016 and the applicable technical documentation, declaration of conformity, CE or UKCA marking and importer identification requirements with the relevant authority. Request reports for the exact instrument and supplied power arrangement through testing and certification.
For equipment within the hazardous-substance rules, a declaration of conformity is required. Check the applicable scope before ordering. Where your business is an electrical-equipment producer, annual producer registration is required; include this in the purchasing plan.
Worked duty example
Illustrative example, not a quote: 10 radio-frequency signal generators; illustrative order only under 8543 20 00 00, invoiced at £12,000 free on board, with £600 of freight and insurance to the UK. The customs value is £12,600. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £12,600, so it is £2,520. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.
Inspection checklist
Output: measure frequency, amplitude and offset across the agreed operating range with calibrated measuring equipment. Check the specified load and record the instrument settings beside each result.
Waveforms: inspect distortion, pulse edges, sweep behaviour and channel timing. Load a buyer-supplied arbitrary waveform and confirm that the delivered instrument reproduces it.
Connections: check output sockets, reference-clock and trigger connections, remote control, stored settings and supplied leads. Confirm that ordered functions remain available after restarting.
Documents and arrival condition: match serial numbers to calibration records and the approved model. Check casing damage, loose sockets, packaging moisture and supplied accessories at inspection. Equipment covered by the electrical safety rules must have clear, legible instructions in understandable English.
What goes wrong
An amplitude claim can look correct on an unloaded output and fail under the buyer's intended load. Other faults include frequency drift after warm-up, distorted waveforms near the operating limits, pulse overshoot and timing errors between channels. Agree acceptance conditions before approving the sample.
A report for a similar model does not establish the performance of the delivered instrument. Check the model, power supply, firmware and enabled functions against the approved sample, and investigate substitutions before releasing the batch.
Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification.
Frequently asked questions
What is the UK import duty on electronic signal generators from China?
The supplied tariff record shows 0% duty under 8543 20 00 00, read on 4 October 2026. No anti-dumping or countervailing duty is listed for that line.
Do signal generators need CE or UKCA marking?
For mains-powered models, confirm the applicable electrical safety marking and supporting conformity-document requirements with the relevant authority. Check the exact instrument's scope and power arrangement.
What should I ask the Chinese factory to specify?
Ask for waveform types, frequency range, amplitude accuracy, load conditions, output impedance, distortion, pulse behaviour and channel timing, plus the acceptance test method.
Is a calibration certificate enough to approve the order?
Use it alongside measured acceptance results and model-specific conformity documents. Match its serial number to the instrument and check that it covers the functions you will use.