Sourcing pH meters from China

UK duty on pH meters

Heading 9027 covers physical and chemical analysis instruments. Its specific line 9027 89 30 00 covers pH meters, rH meters and conductivity apparatus. The table separates common pH meter formats sharing that code; these are not separate tariff subheadings. See laboratory equipment for UK university labs for the wider heading. For chromatographs, see our guide to sourcing HPLC systems. For electronic component testing, see our LCR meter sourcing guide.

Read from the UK Trade Tariff on 16 October 2026, pH meters under 9027 89 30 00 and parts and accessories under 9027 90 00 00 carried 0% duty for goods from China. Neither line listed anti-dumping or countervailing duties, suspensions or attached controls. Import VAT is normally 20%; see UK import duty and VAT.

Confirm the commodity code against the complete instrument and any separately supplied electrode or accessory. Do not assume every replacement probe belongs in the parts line.

Specify the electrode and calibration method

Describe the samples: clean water, process liquid, food slurry or soil suspension. Agree the electrode body, junction, connector, cable, replaceability and storage method. Specify measurement range, accuracy, repeatability, temperature compensation and calibration buffers in the purchase specification. A display with finer resolution does not establish better accuracy.

Agree whether you need a pen, a portable instrument or a bench unit, and whether readings must be recorded. Ask for the exact model's conformity documents and test reports. Under electromagnetic compatibility guidance, the conformity marking should be visible, legible and indelible. For equipment within the hazardous-substance rules, the importer must ensure manufacturer details and conformity marking are correct and clearly identifiable.

Electrical equipment producers must register annually. Establish who holds that role for your supply arrangement before selling the meters. Use testing and certification to organise checks for the agreed model.

Worked duty example

Illustrative example, not a quote: Illustrative batch of portable pH meters with replacement electrodes, not a quotation under 9027 89 30 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: use fresh agreed buffers, record temperature and readings, and compare against the purchase specification.

Electrode: inspect the glass bulb, junction, connector and storage cap; check for cracks, leakage and a dried-out probe.

Performance: check repeatability after rinsing, stability in the intended sample and operation of temperature compensation.

Delivery: match model identifiers, accessories, markings and instructions to the approved sample and documents. Repeat functional checks on arrival; see quality inspection.

What goes wrong

A meter can calibrate in clean buffers yet perform poorly in a viscous or contaminated sample. An unsuitable junction, damaged bulb or poor storage can cause drift and slow response. Test the proposed electrode with your actual sample before approving the order.

Replacement probes can look identical but have incompatible connectors or different performance. Put the approved electrode model and storage instructions in the order, and check the delivered batch against them. Treat calibration consumables and replacement availability as part of the purchasing decision.

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.