Sourcing turbidity meters from China

UK duty on turbidity meters

Heading 9027 covers physical and chemical analysis instruments. Optical turbidity meters are candidates for 9027 50 00 00, covering other instruments using optical radiation. Portable, benchtop and inline versions share this candidate line, so the table repeats it by format. Dedicated parts and accessories may fall under 9027 90 00 00; confirm their classification separately.

Read from the UK Trade Tariff on 18 October 2026, the selected lines carried 0% duty for goods from China, with no listed anti-dumping or countervailing duty, suspension or attached control. The separate residual line 9027 89 90 00 has an export control of mercury attached. If that line is proposed, ask your customs broker to confirm the control's relevance.

Give your broker the operating principle, technical datasheet and description of everything supplied. Confirm the commodity code before shipment; a supplier's description of a water-testing instrument is insufficient to distinguish turbidity measurement from other analytical functions.

Specify the optical method and sample handling

Specify whether the meter measures scattered light or transmitted light, the light source, displayed units, measuring range, resolution and acceptable error across the samples you actually test. Agree calibration materials, their storage conditions and replacement availability. Ask the factory to demonstrate the proposed model with your reference samples rather than sending a generic catalogue.

For portable and benchtop meters, define cell material, dimensions, orientation and cleaning procedure. For inline instruments, define wetted materials, process connections, operating conditions, cleaning access and signal output. Agree how bubbles, coloured samples and fouling will be handled, and whether results can be exported without additional software purchases.

For electrical models intended for Great Britain, review the applicable conformity route with testing and certification. The electromagnetic compatibility guidance recognises CE marking indefinitely. Under the hazardous-substances guidance, individual products must show the importer's name or trademark and contactable address on the product or packaging. Electrical-equipment producers must register annually; confirm how this applies to your importing business.

Worked duty example

Illustrative example, not a quote: Illustrative batch of benchtop turbidity meters, not a quotation under 9027 50 00 00, invoiced at £10,000 free on board, with £900 of freight and insurance to the UK. The customs value is £10,900. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £10,900, so it is £2,180. 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

Calibration: compare readings against agreed reference materials across the intended range, record repeatability and retain the results against each inspected instrument.

Sample path: inspect cells for scratches, contamination and poor fit; check lids, seals and inline connections for leakage and trapped bubbles.

Operation: check zeroing, response stability, cleaning access, display readability and data export using the agreed sample-handling procedure.

Identity: match the model, serial identification, power supply and supplied accessories to the order and conformity documents. Check that the manual explains calibration and maintenance. Use quality inspection to agree the inspection scope.

What goes wrong

A meter can give stable readings while disagreeing with your existing instrument because the optical method, light source or reporting units differ. Scratched cells, fingerprints, bubbles and coloured samples can also distort comparisons. Agree the comparison procedure and acceptance criteria before approving the production sample.

An inline probe may work on the bench but drift after installation because of fouling or unsuitable sample flow. Missing replacement cells, calibration materials or cleaning parts can make routine use difficult. Put the maintenance procedure and replacement accessories in the purchase specification.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For components and parts, see sourcing for manufacturers.